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CALSCALE:GREGORIAN
UID:0b354221-0378-4d08-9548-5b8b54d16530
X-WR-TIMEZONE:UTC
X-WR-CALNAME:IAS Academic
BEGIN:VEVENT
UID:ac55bb43-3fba-4dd3-b77d-366dad663c83
DTSTAMP:20210308T215704Z
CREATED:20200827T132041Z
DESCRIPTION:Topic: High Dimensional Expanders and Ramanujan Complexes\n\nSp
eakers: Alexander Lubotzky\n\nAffiliation: Hebrew University\n\nExpander g
raphs in general\, and Ramanujan graphs in particular\, have\nplayed an im
portant role in computer science and pure mathematics in\nthe last four de
cades. In recent years the area of high dimensional\nexpanders (i.e. simpl
ical complexes with properties generalizing those\nof expanding graphs) an
d Ramanujan complexes is starting to emerge.\nThe various motivations of t
his subarea will be surveyed: these\ninclude connections and applications
to cohomology and Gromov's\noverlapping problem on the pure math side and
to property testing and\nerror correcting codes on the CS side.\n
DTSTART:20201208T153000Z
DTEND:20201208T173000Z
LAST-MODIFIED:20210106T051456Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-465
END:VEVENT
BEGIN:VEVENT
UID:dcb1fbb1-7491-4359-b01f-d6a1c1ac0fb4
DTSTAMP:20210308T215704Z
CREATED:20201002T172510Z
DESCRIPTION:Topic: Cartesian model structure and marked simplicial sets\n\n
Speakers: Carlos Tschudi Simpson\n\nAffiliation: CNRS\, Université de Nice
Sophia Antipolis\; Visiting Professor\, School of Mathematics\n\n
DTSTART:20201208T183000Z
DTEND:20201208T203000Z
LAST-MODIFIED:20210104T023936Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-8
END:VEVENT
BEGIN:VEVENT
UID:36c38a2b-1a48-4aa3-9a88-4c4f2600ba67
DTSTAMP:20210308T215704Z
CREATED:20201109T192416Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20201208T200000Z
DTEND:20201208T220000Z
LAST-MODIFIED:20210106T233132Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-6
END:VEVENT
BEGIN:VEVENT
UID:0296abd6-9d6b-4816-9939-f724d3ead393
DTSTAMP:20210308T215704Z
CREATED:20201204T162133Z
DESCRIPTION:Topic: Two Decades Plus with NASA’s Chandra X-ray Observatory\n
\nSpeakers: Kimberly Arcand\n\nAffiliation: NASA's Chandra X-ray Observato
ry\n\nIn the past 20 plus years\, NASA’s Chandra X-ray Observatory has mad
e\nprofound discoveries and contributed invaluable information about\nobje
cts in our Universe. Chandra is part of a rich legacy of\ntelescopes with
its X-ray lineage stretching back to the Space Age\nwhen scientists and en
gineers pioneered instruments that were sent\nabove the Earth’s atmosphere
. Each decade has brought new\ninnovations and new capabilities\, culminat
ing in Chandra’s launch\naboard the Space Shuttle Columbia in 1999.\n\nCha
ndra has strong astronomical family ties across the electromagnetic\nspect
rum. As part of NASA’s “Great Observatories” program\,\nChandra was design
ed and built to observe X-rays alongside the Hubble\nSpace Telescope\, the
Spitzer Space Telescope\, and the Compton\nGamma-ray Observatory. The que
st to explore the Universe is both\nmulti-wavelength and multi-messenger i
n nature\, with many significant\ndiscoveries requiring information from d
ifferent types of light as\nwell as gravitational waves and more. Learn mo
re about Chandra\, and\nthe pivotal role it has played in understanding ou
r Universe.\n
DTSTART:20201209T003000Z
DTEND:20201209T023000Z
LAST-MODIFIED:20201204T162448Z
LOCATION:Virtual Event via Zoom
SUMMARY:Amateur Astronomers Association of Princeton (AAAP) Monthly Meeting
URL:https://www.ias.edu/sns/events/amateur-astronomers-association-princeto
n-aaap-monthly-meeting
END:VEVENT
BEGIN:VEVENT
UID:865491a6-1b05-494a-bbd4-e25831eb0f24
DTSTAMP:20210308T215704Z
CREATED:20200901T214658Z
DESCRIPTION:Topic: Vanishing of cohomology for groups acting on buildings\n
\nSpeakers: Izhar Oppenheim\n\nAffiliation: Ben Gurion University\n\nIn hi
s seminal paper from 1973\, Garland introduced a machinery for\nproving va
nishing of group cohomology for groups acting on Bruhat-Tits\nbuildings. T
his machinery\, known today as “Garland’s method”\,\nhad several applicati
ons as a tool for proving rigidity results (e.g.\,\nproving Kazhdan proper
ty (T) or\, more recently\, group stability\nresults). In my talk\, I will
introduce a variation of Garland’s\nmethod\, explain how it yields vanish
ing cohomology and how it can be\ngeneralized to vanishing of cohomology w
ith Banach coefficients. Parts\nof this talk are based on joint works with
Z. Grinbaum-Reizis and A.\nLubotzky.\n
DTSTART:20201209T160000Z
DTEND:20201209T171500Z
LAST-MODIFIED:20210104T024032Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-7
END:VEVENT
BEGIN:VEVENT
UID:15784f69-dfff-4981-aa1c-a7591c293a9d
DTSTAMP:20210308T215704Z
CREATED:20201008T194301Z
DESCRIPTION:Topic: Lefschetz operators\, Hodge-Riemann forms\, and represen
tations\n\nSpeakers: Peter Fiebig\n\nAffiliation: Friedrich-Alexander-Univ
ersität Erlangen-Nürnberg\; Member\, School of Mathematics\n\nMotivated by
a formal similarity between the Hard Lefschetz theorem\nand the geometric
Satake equivalence we study vector spaces that are\ngraded by a weight la
ttice and are endowed with linear operators in\nsimple root directions. We
allow field coefficients in characteristics\ndifferent from 2. In the cas
e that a “Hodge-Riemann form” exists\,\nthe operators (and the grading) yi
eld a semisimple representation of\nthe associated Lie algebra. We then ex
plore the analogous theory with\nthe field replaced by the ring of p-adic
integers. In this setup we\nobtain tilting modules for the associated alge
braic group.\n
DTSTART:20201209T200000Z
DTEND:20201209T220000Z
LAST-MODIFIED:20210104T024130Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-11
END:VEVENT
BEGIN:VEVENT
UID:249f6630-b169-4af9-8159-6af58574b448
DTSTAMP:20210308T215704Z
CREATED:20200806T232156Z
DESCRIPTION:Topic: Determinants\, hyperbolicity\, and interlacing\n\nSpeake
rs: Cynthia Vinzant\n\nAffiliation: North Carolina State University\; von
Neumann Fellow\, School of Mathematics\n\nHyperbolic polynomials are a mul
tivariate generalization of\nreal-rooted polynomials that originated in th
e study of partial\ndifferential equations and have since found applicatio
ns in many other\nfields\, including operator theory\, optimization\, and
combinatorics.\nOne motivating example comes from the determinant of a sym
metric\nmatrix\, and many fundamental properties of eigenvalues can be der
ived\nfrom this more general context. In this talk\, I will survey some of
\nthe beautiful geometry underlying these polynomials and a sampling of\nt
heir applications.\n
DTSTART:20201209T223000Z
DTEND:20201210T000000Z
LAST-MODIFIED:20210104T024227Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-193
END:VEVENT
BEGIN:VEVENT
UID:988cfbcf-048e-436e-bc24-179b576dcad0
DTSTAMP:20210308T215704Z
CREATED:20201009T161556Z
DESCRIPTION:
DTSTART:20201210T150000Z
DTEND:20201210T170000Z
LAST-MODIFIED:20210104T024324Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-9
END:VEVENT
BEGIN:VEVENT
UID:fe990767-3538-4259-9c48-e42ba9532d9c
DTSTAMP:20210308T215704Z
CREATED:20201204T163326Z
DESCRIPTION:Topic: Near-Field Cosmology with Chemical Abundances in Ultra-f
aint Dwarf Galaxies\n\nSpeakers: Alex Ji\n\nAffiliation: Carnegie Observat
ories/University of Chicago\n\nUltra-faint dwarf galaxies (UFDs\, with ste
llar mass below 1e5 Msun)\nare relics of the first galaxies\, providing a
large population of\nlocal objects that can be connected to theoretical pr
edictions of\nhigh-redshift star and galaxy formation. Much of the informa
tion is\nencoded in the chemical abundances of stars in these relic galaxi
es. I\nwill describe the current status of chemical abundance measurements
in\nUFD galaxies\, focusing on how stochastic chemical enrichment can\npr
ovide key insights into the nature of the first stars and the faint\nend o
f galaxy formation. The unique abundance trends observed in UFDs\nalso ena
ble chemical tagging of some Milky Way halo stars as\noriginating from dis
rupted UFDs\, enabling upcoming spectroscopic\nsurveys to constrain the nu
mber of UFDs at high redshift.\n
DTSTART:20201210T183000Z
DTEND:20201210T193000Z
LAST-MODIFIED:20201204T163728Z
LOCATION:Virtual Event via Zoom
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
1
END:VEVENT
BEGIN:VEVENT
UID:0201f18a-013a-4152-a19b-6090d0b11b7e
DTSTAMP:20210308T215704Z
CREATED:20200923T172415Z
DESCRIPTION:Topic: On the Liouville function at polynomial arguments\n\nSpe
akers: Joni Teräväinen\n\nAffiliation: University of Oxford\n\nLet $\lambd
a$ be the Liouville function and $P(x)$ any polynomial that\nis not a squa
re. An open problem formulated by Chowla and others asks\nto show that the
sequence $\lambda(P(n))$ changes sign infinitely\noften. We present a sol
ution to this problem for new classes of\npolynomials $P$\, including any
product of linear factors or any\nproduct of quadratic factors of a certai
n type. The proofs also\nestablish some nontrivial cancellation in Chowla
and Elliott type\ncorrelation averages.\n
DTSTART:20201210T213000Z
DTEND:20201210T223000Z
LAST-MODIFIED:20210108T165006Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-432
END:VEVENT
BEGIN:VEVENT
UID:ea0eedfe-94cb-4052-937e-5dd2f1b46c3c
DTSTAMP:20210308T215704Z
CREATED:20200901T215902Z
DESCRIPTION:Topic: Hierarchies of contact manifolds via rational SFT\n\nSpe
akers: Zhengyi Zhou\n\nAffiliation: Member\, School of Mathematics\n\nI wi
ll explain the construction of a functor from the exact symplectic\ncobord
ism category to a totally ordered set\, which measures the\ncomplexity of
the contact structure. Those invariants are derived from\na bi-Lie infinit
y formalism of the rational SFT and a partial\nconstruction of the rationa
l SFT. In this talk\, I will focus on the\nconstruction and properties of
the functor. Time permitting\, I will\nexplain applications\, computations
\, and relations to the involutive\nbi-Lie infinity formalism of the full
SFT. This is joint work with\nAgustin Moreno.\n
DTSTART:20201211T141500Z
DTEND:20201211T154500Z
LAST-MODIFIED:20210104T024516Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-52
END:VEVENT
BEGIN:VEVENT
UID:021f4bd2-b687-41df-b797-2c0135139630
DTSTAMP:20210308T215704Z
CREATED:20201208T192803Z
DESCRIPTION:
DTSTART:20201211T150000Z
DTEND:20201211T170000Z
LAST-MODIFIED:20210106T041154Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-10
END:VEVENT
BEGIN:VEVENT
UID:170dad24-e5ee-4a0c-9ff4-bb4af6514efb
DTSTAMP:20210308T215704Z
CREATED:20201201T134245Z
DESCRIPTION:Topic: Status of experiments and simulations on scaling problem
s in turbulence\n\nSpeakers: Katepalli Sreenivasan\n\nAffiliation: New Yor
k University\n\nAbstract: We present an elementary summary of known result
s\, and open\nquestions\, on scaling problems in hydrodynamic turbulence i
n three\ndimensions. The goal is to provide some background for the two ta
lks\nto follow\, and summarize Victor Yakhot's theory\, depending on the\n
time available.\n\nReferences: Area rule for circulation and minimal surfa
ces in\nthree-dimensional turbulence\, Kartik P. Iyer\n[https://nam02.safe
links.protection.outlook.com/?url=https%3A%2F%2Furldefense.proofpoint.com%
2Fv2%2Furl%3Fu%3Dhttps-3A__arxiv.org_search_physics-3Fsearchtype-3Dauthor-
26query-3DIyer-252C-2BK-2BP%26d%3DDwMDaQ%26c%3DslrrB7dE8n7gBJbeO0g-IQ%26r%
3DiNCm7lO-9WXa6rTFEuBmBT7aFBJrSm22E5XtOJUImGI%26m%3DIa5zHvandX6fB8PInGuQyQ
VvNjebT9HxXUwyJiLrphI%26s%3DI6rhi-zoTBbruvafwJTzqYwZV8XalgZZscjLW_gr6rw%26
e%3D&data=04%7C01%7Ceyink%40jhu.edu%7C7f7b507dae254240532e08d89558f9eb%7C9
fa4f438b1e6473b803f86f8aedf0dec%7C0%7C0%7C637423556671511075%7CUnknown%7CT
WFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0
%3D%7C1000&sdata=M79vJ0T6G7U7cMXNPfHSy%2FxChb8YeCeuTOXush8hzXE%3D&reserved
=0]\, Sachin\nS. Bharadwaj\n[https://nam02.safelinks.protection.outlook.co
m/?url=https%3A%2F%2Furldefense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__
arxiv.org_search_physics-3Fsearchtype-3Dauthor-26query-3DBharadwaj-252C-2B
S-2BS%26d%3DDwMDaQ%26c%3DslrrB7dE8n7gBJbeO0g-IQ%26r%3DiNCm7lO-9WXa6rTFEuBm
BT7aFBJrSm22E5XtOJUImGI%26m%3DIa5zHvandX6fB8PInGuQyQVvNjebT9HxXUwyJiLrphI%
26s%3DvBfFgbhGGL_v29LpTEAc5Jkm1il_1OQzT9R1cSzy6Es%26e%3D&data=04%7C01%7Cey
ink%40jhu.edu%7C7f7b507dae254240532e08d89558f9eb%7C9fa4f438b1e6473b803f86f
8aedf0dec%7C0%7C0%7C637423556671521066%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4
wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=WrDae
rVelqHuEs0CCM2pRRf6cRzwD4YUPtvs2fxHOs8%3D&reserved=0]\, Katepalli\nR. Sree
nivasan\n[https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%
2Furldefense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__arxiv.org_search_ph
ysics-3Fsearchtype-3Dauthor-26query-3DSreenivasan-252C-2BK-2BR%26d%3DDwMDa
Q%26c%3DslrrB7dE8n7gBJbeO0g-IQ%26r%3DiNCm7lO-9WXa6rTFEuBmBT7aFBJrSm22E5XtO
JUImGI%26m%3DIa5zHvandX6fB8PInGuQyQVvNjebT9HxXUwyJiLrphI%26s%3DDkBOL3HQeoD
K2-n186vh_bY9BKEhZ4h6RpuesvwwArM%26e%3D&data=04%7C01%7Ceyink%40jhu.edu%7C7
f7b507dae254240532e08d89558f9eb%7C9fa4f438b1e6473b803f86f8aedf0dec%7C0%7C0
%7C637423556671521066%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoi
V2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=wvNrikYmjJhBSWts%2FkQs
ECRmVc4YFec2W2sqZM6yg6g%3D&reserved=0]\, arXiv:2007.06723\; Scaling\nexpon
ents saturate in three-dimensional isotropic turbulence\, K. P.\nIyer\, K.
Sreenivasan\, P. K. Yeung\, Phys. Rev. Fluids.5.054605\n[https://nam02.sa
felinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.proofpoint.co
m%2Fv2%2Furl%3Fu%3Dhttps-3A__doi.org_10.1103_PhysRevFluids.5.054605%26d%3D
DwMDaQ%26c%3DslrrB7dE8n7gBJbeO0g-IQ%26r%3DiNCm7lO-9WXa6rTFEuBmBT7aFBJrSm22
E5XtOJUImGI%26m%3DIa5zHvandX6fB8PInGuQyQVvNjebT9HxXUwyJiLrphI%26s%3DDZ8Ac5
XRiqg_3GW9uPHA6AKiJmJUzOSWqjUBJGERL5w%26e%3D&data=04%7C01%7Ceyink%40jhu.ed
u%7C7f7b507dae254240532e08d89558f9eb%7C9fa4f438b1e6473b803f86f8aedf0dec%7C
0%7C0%7C637423556671531068%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJ
QIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=mYpbfSUznna9kOazb
IPrmoBnFecbUHedrwguxVUCvwU%3D&reserved=0]\;\nV. Yakhot\, preprint\n
DTSTART:20201211T183000Z
DTEND:20201211T191500Z
LAST-MODIFIED:20201204T212111Z
LOCATION:Virtual Event via Zoom
SUMMARY:Workshop on Turbulence
URL:https://www.ias.edu/math/events/workshop-turbulence
END:VEVENT
BEGIN:VEVENT
UID:16b585cc-063d-4ac5-b68c-f122cd87e37b
DTSTAMP:20210308T215704Z
CREATED:20201201T175027Z
DESCRIPTION:Topic: Fluid Turbulence\, Thermal Noise and Spontaneous Stochas
ticity\n\nSpeakers: Gregory Eyink\n\nAffiliation: Johns Hopkins University
\n\nAbstract: I will explain that incompressible Navier-Stokes is the\nwro
ng equation to describe turbulence in low Mach number molecular\nfluids be
cause it neglects the effects of thermal noise. There\nshould\, in fact\,
be strong effects of thermal noise throughout the\ndissipation range. Ther
mal noise will manifest itself also in the\ninertial-range dynamics\, with
the detailed large-scale flow depending\nupon the particular realization
of the molecular noise in just a few\nlarge-eddy turnover times. This is d
ue to the phenomenon of\n'spontaneous stochasticity'. We will discuss a re
normalization group\napproach to calculate the spontaneous statistics\, th
eir universality\ndomains and the finite Reynolds-number corrections. \n
\nG. L. Eyink & D. Bandak\, “A Renormalization Group Approach to\nSpontane
ous Stochasticity”\, Physical Review Research\, 2\, 043161\n(2020)\, http
s://arxiv.org/abs/2007.01333\n[https://urldefense.proofpoint.com/v2/url?u=
https-3A__arxiv.org_abs_2007.01333&d=DwMGaQ&c=slrrB7dE8n7gBJbeO0g-IQ&r=iNC
m7lO-9WXa6rTFEuBmBT7aFBJrSm22E5XtOJUImGI&m=8MBGQQ0JId9xlihTG1eRmk5rZjKGZvu
vtGUG2qC3mOE&s=5shJ66xIlZSDDIMpAhByHFV_GYmIpqsCoBfccVn3k2s&e=]\n
DTSTART:20201211T193000Z
DTEND:20201211T201500Z
LAST-MODIFIED:20201207T131524Z
LOCATION:Virtual Event via Zoom
SUMMARY:Workshop on Turbulence
URL:https://www.ias.edu/math/events/workshop-turbulence-1
END:VEVENT
BEGIN:VEVENT
UID:a7b1a3db-4267-4ce1-8c85-32be99494ae5
DTSTAMP:20210308T215704Z
CREATED:20201204T161320Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20201211T200000Z
DTEND:20201211T210000Z
LAST-MODIFIED:20201204T161359Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-0
END:VEVENT
BEGIN:VEVENT
UID:54c4120e-78a2-4a33-82f8-322480c7bc1b
DTSTAMP:20210308T215704Z
CREATED:20201201T174324Z
DESCRIPTION:Topic: Turbulence as Gibbs Statistics of Vortex Sheets\n\nSpeak
ers: Alexander Migdal\n\nAffiliation: New York University\n\nAbstract: We
study the vortex sheet solutions of the Euler equation\,\nwhich correspond
to the tangent discontinuity of the velocity field.\n\nWe observe that st
ationary flows correspond to the Hamiltonian's\nminimization by the tangen
t discontinuity density Γ. This\nobservation means that the stationary flo
w represents the\nlow-temperature limit of Gibbs distribution of the vorte
x dynamics. An\ninfinite number of Euler conservation laws leads to a dege
nerate\nvacuum of this system\, which degeneracy explains the complexity o
f the\nturbulent statistics and provides the relevant degrees of freedom\n
(random surfaces).\n\nWe find an exact analytic solution with a spherical
surface. This\nsolution provides an example of the instanton advocated in
our recent\nwork\, which is supposed to be responsible for the dissipation
in the\nNavier-Stokes equation in the turbulent limit of vanishing viscos
ity\nat fixed energy flow. We further conclude that one can obtain the\ntu
rbulent statistics from the Gibbs statistics of vortex sheets by\nadding L
agrange multipliers for the conserved volume inside closed\nsurfaces\, ene
rgy pumping\, and energy dissipation via viscosity anomaly\nin the enstrop
hy. The effective temperature in our Gibbs distribution\ngoes to zero as $
\nu^{\frac{2}{5}}$ in the turbulent limit\, which\nopens the way for the q
uantitative theory of turbulence as\nlow-temperature expansion in this Gib
bs ensemble around minimal\nsurfaces.\n\nThe instantons correspond to doma
in walls bounded by strings\, studied\nin cosmology\, and observed in liqu
id Helium. They are known to be\ntopologically stable.\n\n \n
DTSTART:20201211T203000Z
DTEND:20201211T211500Z
LAST-MODIFIED:20201207T131444Z
LOCATION:Virtual Event via Zoom
SUMMARY:Workshop on Turbulence
URL:https://www.ias.edu/math/events/workshop-turbulence-0
END:VEVENT
BEGIN:VEVENT
UID:57ab4dd2-093b-4dea-a99f-c29f0c4d4274
DTSTAMP:20210308T215704Z
CREATED:20201009T172733Z
DESCRIPTION:Topic: Application of Convolutional Neural Networks to Identify
Protostellar Outflows in CO Emission\n\nSpeakers: Duo Xu\n\nAffiliation:
University of Texas\, Austin\n\nEach week\, we hold a relatively informal
seminar/discussion series\nwith an emphasis on extra-galactic and large-sc
ale structure\nastrophysics.\n\nDuring Galread a leader/visitor presents a
recent paper to the\ndiscussion group. The PDF of the paper is projected
onto a large\nscreen\, and a guest explains the paper\, section by section
\, in greater\ndetail than may be explained within the text of the article
. To aid\nwith discussion\, only the article PDF is presented -- no\npower
point-style slides. Galread discussions are very friendly and\ninteractive
.\n
DTSTART:20201214T160000Z
DTEND:20201214T170000Z
LAST-MODIFIED:20201211T140213Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-42
END:VEVENT
BEGIN:VEVENT
UID:64dd36f6-4b96-4af7-91b4-2bd67b059634
DTSTAMP:20210308T215704Z
CREATED:20201211T142315Z
DESCRIPTION:Topic: Observable Signatures of Interstellar Objects\n\nSpeaker
s: Amir Siraj\n\nAffiliation: Harvard University\n\n`Oumuamua and Borisov
are the first two confirmed interstellar objects\ndetected in the solar sy
stem. The study of interstellar objects could\nserve as a novel lens throu
gh which exoplanets and planetary system\nformation can be studied. Given
the scarcity of interstellar objects\ndiscovered as of yet\, it is importa
nt to explore a broad range of\nobservational methods that could enhance t
he rate of interstellar\nobject detection and provide insight into poorly
understood physical\nprocesses. Exotic sub-classes of interstellar objects
identifiable by\ntheir size\, composition\, or kinematics\, could shed li
ght on specific\nproduction routes\, in turn revealing properties of their
host systems.\nI will present work on observational methods for the disco
very and\ncharacterization of interstellar objects\, and discuss implicati
ons for\nunderstanding their origins.\n
DTSTART:20201214T171500Z
DTEND:20201214T181500Z
LAST-MODIFIED:20201211T142522Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-exoplanet-discussio
n-group-5
END:VEVENT
BEGIN:VEVENT
UID:3f416101-38fd-4b62-8bc1-abf7ac7c1186
DTSTAMP:20210308T215704Z
CREATED:20200922T193604Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20201214T173000Z
DTEND:20201214T190000Z
LAST-MODIFIED:20201211T190346Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-28
END:VEVENT
BEGIN:VEVENT
UID:083b7182-686e-4f6a-af54-f3afcd1b3119
DTSTAMP:20210308T215704Z
CREATED:20200924T162048Z
DESCRIPTION:Topic: A Feynman Approach to Dynamic Rate Markov Processes\n\nS
peakers: William A. Massey\n\nAffiliation: Princeton University\; Member\,
School of Mathematics\n\nPhysics inspired mathematics helps us understand
the random evolution\nof Markov processes. For example\, the Kolmogorov f
orward and backward\ndifferential equations that govern the dynamics of Ma
rkov transition\nprobabilities are analogous to the Schrodinger and Heisen
berg pictures\nof quantum mechanics.\n\nRichard Feynman introduced a time-
ordered operator calculus that\ncreated a third framework for quantum mech
anics and incorporates the\ntwo older quantum pictures. Applying these tec
hniques to\ntime-inhomogeneous Markov processes creates a transition proba
bility\nanalysis that reveals their fundamental sample path structure.\nMo
reover\, this interpretation can motivate a time-inhomogeneous\,\nasymptot
ic generalization of steady state analysis.\n
DTSTART:20201214T190000Z
DTEND:20201214T200000Z
LAST-MODIFIED:20210105T113903Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-347
END:VEVENT
BEGIN:VEVENT
UID:8d9d6530-f28d-4cdb-a8ca-1f584596498c
DTSTAMP:20210308T215704Z
CREATED:20200925T221742Z
DESCRIPTION:Topic: The singular set in the Stefan problem\n\nSpeakers: Joaq
uim Serra\n\nAffiliation: Eidgenössische Technische Hochschule Zürich\n\nT
he Stefan problem\, dating back to the XIX century\, aims to describe\nthe
evolution of a solid-liquid interface\, typically a block of ice\nmelting
in water. A celebrated work of Luis Caffarelli from the 1970's\nestablish
ed that the ice-water interface must be an analytic surface\noutside of a
certain closed set: the so-called singular set. This\nsingular set was onl
y known to be contained in a surface of class\n$C^1$ and it could be\, a p
riori\, as large as the regular set. I will\npresent a recent joint work w
ith A. Figalli and X. Ros-Oton in which\nwe obtain new delicate bounds on
the size (Hausdorff dimension) of the\nsingular set in the Stefan problem.
\n
DTSTART:20201214T213000Z
DTEND:20201214T223000Z
LAST-MODIFIED:20210105T113955Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-130
END:VEVENT
BEGIN:VEVENT
UID:2234ede8-d861-4986-a95b-63dae9952082
DTSTAMP:20210308T215704Z
CREATED:20201002T172517Z
DESCRIPTION:Topic: (Homotopy) limits and colimits\n\nSpeakers: Tony Feng\n
\nAffiliation: Member\, School of Mathematics\n\n
DTSTART:20201215T183000Z
DTEND:20201215T203000Z
LAST-MODIFIED:20210104T024613Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-9
END:VEVENT
BEGIN:VEVENT
UID:ccdd9169-c25c-46b2-8e99-5064aa71de9f
DTSTAMP:20210308T215704Z
CREATED:20201109T192435Z
DESCRIPTION:Topic: Cohomology: qualitative and stable results\n\nSpeakers:
Eric M. Friedlander\n\nAffiliation: University of Southern California\; Me
mber\, School of Mathematics\n\nWe survey work over the last 50 years adva
ncing our understandingof\ncohomology of groups. We begin with results of
Daniel Quillen which\nhave influenced all that follows. We mention stabili
ty results of\nCline\, Parshall\, Scott\, and van der Kallen relating the
rational\ncohomology of a simple algebraic group $G$ defined over a finite
field\nk and the cohomology of associated finite groups $G(K)$ of $K$-poi
nts\nof $G$ for $K/k$ finite. We proceed to discuss cohomology in the\ncat
egory of (strict polynomial) functors\, especially joint work with\nAndrei
Suslin\, leading to many stable computations of cohomology. Time\npermitt
ing\, we shall mention various basic properties which remain to\nbe proved
. For example\, unanswered questions abound about the rational\ncohomology
of the Heisenberg group $U_3$ and its associated finite\ngroups $U_3(k)$.
\n
DTSTART:20201215T200000Z
DTEND:20201215T220000Z
LAST-MODIFIED:20210106T233152Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-7
END:VEVENT
BEGIN:VEVENT
UID:a934526e-ffc6-4fbf-9299-06f97261c51d
DTSTAMP:20210308T215704Z
CREATED:20200901T214718Z
DESCRIPTION:Topic: Hilbert-Schmidt stability of groups via C*-algebras\n\nS
peakers: Tatiana Shulman\n\nAffiliation: Polish Academy of Science\n\nThe
aim of this talk is to show that C*-algebras are useful for\nstudying stab
ility of groups. In particular we will discuss some\nobstructions for Hilb
ert-Schmidt stability of groups\, obtain a\ncomplete characterization of H
ilbert-Schmidt stability for amenable\ngroups in terms of characters\, and
discuss some examples of amenable\nand non-amenable Hilbert-Schmidt stabl
e groups. If time permits we\nalso will consider certain modifications of
Hilbert-Schmidt stability\nwhen matrices are replaced by elements of von N
eumann factors\, as well\nas a relation between Hilbert-Schmidt stability
and operator\nnorm-stability. All necessary information on C*-algebras wil
l be given\nduring the talk. The talk is mostly based on joint works with
Don\nHadwin.\n
DTSTART:20201216T160000Z
DTEND:20201216T171500Z
LAST-MODIFIED:20210104T024709Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-8
END:VEVENT
BEGIN:VEVENT
UID:bd56851b-8d64-4955-8dcc-e05a6cca4653
DTSTAMP:20210308T215704Z
CREATED:20201008T194309Z
DESCRIPTION:Topic: Hecke category via derived convolution formalism\n\nSpea
kers: Dima Arinkin\n\nAffiliation: University of Wisconsin–Madison\n\nThe
talk is about convolution in the setting of geometric\nrepresentation theo
ry. What are its formal properties? As a starting\npoint\, let $G$ be a gr
oup and let $D(G)$ be the derived category of\nconstructible sheaves on it
. Convolution turns $D(G)$ into a monoidal\ncategory\, which is rigid (eve
ry object is dualizable) if and only if\n$G$ is proper (this statement is
due to Boyarchenko and Drinfeld).\n\nIn this talk\, I develop the formalis
m of convolution using the\nlanguage of derived algebraic geometry\, and t
hen apply these\ntechniques to the (spherical) Hecke category and related
objects.\n
DTSTART:20201216T200000Z
DTEND:20201216T220000Z
LAST-MODIFIED:20210104T024805Z
LOCATION:Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-12
END:VEVENT
BEGIN:VEVENT
UID:af1a2901-cfa2-4a6e-8a28-423bdf996a59
DTSTAMP:20210308T215704Z
CREATED:20200806T232220Z
DESCRIPTION:Topic: The perceptron problem\n\nSpeakers: Nike Sun\n\nAffiliat
ion: Massachusetts Institute of Technology\n\nIn high dimensions\, what do
es it look like when we take the\nintersection of a set of random half-spa
ces with either the sphere or\nthe Hamming cube? This is one phrasing of t
he so-called perceptron\nproblem\, whose study originated with a toy model
of a very simple\nneural network. In this talk I will survey the (non-rig
orous) physics\nsolution from the 70s and 80s\, and some more recent mathe
matical\nprogress.\n
DTSTART:20201216T223000Z
DTEND:20201217T000000Z
LAST-MODIFIED:20210104T024901Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-194
END:VEVENT
BEGIN:VEVENT
UID:ddab4a55-62c3-43da-8c29-289fe90a7c4a
DTSTAMP:20210308T215704Z
CREATED:20201009T161603Z
DESCRIPTION:
DTSTART:20201217T150000Z
DTEND:20201217T170000Z
LAST-MODIFIED:20210106T041236Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-11
END:VEVENT
BEGIN:VEVENT
UID:9a02c2c0-9ed0-4bd3-818e-8ac2d33bf765
DTSTAMP:20210308T215704Z
CREATED:20200923T172421Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20201217T213000Z
DTEND:20201217T223000Z
LAST-MODIFIED:20210108T165047Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-433
END:VEVENT
BEGIN:VEVENT
UID:6695a140-6d38-43ec-ba53-7ba656d1c177
DTSTAMP:20210308T215704Z
CREATED:20201209T213321Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20201218T141500Z
DTEND:20201218T154500Z
LAST-MODIFIED:20210106T020606Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-53
END:VEVENT
BEGIN:VEVENT
UID:ed000962-f0ec-4beb-a0b4-5eee9ff66051
DTSTAMP:20210308T215704Z
CREATED:20201217T135552Z
DESCRIPTION:Topic: Axions and DM Radio at Princeton\n\nSpeakers: Saptarshi
Chaudhuri\n\nAffiliation: Princeton University\n\n I introduce DM Radio\,
a lumped-LC oscillator search for axion dark\nmatter. I review the detecti
on scheme and design\, current experimental\nstatus\, and future prospects
\, including the use of electromagnetic\nquantum metrology in previously-u
nexplored kHz and MHz frequency\nranges. Experimental efforts at Princeton
\, in particular probes of\nloss mechanisms in high-quality-factor lumped-
LC resonators\, are\ndiscussed.\n\n
DTSTART:20201218T170000Z
DTEND:20201218T180000Z
LAST-MODIFIED:20201217T135826Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Lunch Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-group-lunch
-seminar-2
END:VEVENT
BEGIN:VEVENT
UID:46932f48-73c4-40ec-a79d-0bd86274ce40
DTSTAMP:20210308T215704Z
CREATED:20200110T165522Z
DESCRIPTION:
DTSTART:20201218T230000Z
DTEND:20201218T230000Z
LAST-MODIFIED:20210104T025150Z
LOCATION:
SUMMARY:IAS School of Mathematics Term I Ends
URL:https://www.ias.edu/math/events/ias-school-mathematics-term-i-ends
END:VEVENT
BEGIN:VEVENT
UID:1f2d2913-dc48-4f21-8d78-15b974a34a66
DTSTAMP:20210308T215704Z
CREATED:20210106T155427Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210108T200000Z
DTEND:20210108T210000Z
LAST-MODIFIED:20210106T155506Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-1
END:VEVENT
BEGIN:VEVENT
UID:65453cb3-369f-4cf5-8a20-c054b485c3cb
DTSTAMP:20210308T215704Z
CREATED:20200110T165737Z
DESCRIPTION:
DTSTART:20210111T140000Z
DTEND:20210111T140000Z
LAST-MODIFIED:20210104T025344Z
LOCATION:
SUMMARY:IAS School of Mathematics Term II Begins
URL:https://www.ias.edu/math/events/ias-school-mathematics-term-ii-begins
END:VEVENT
BEGIN:VEVENT
UID:864d7e0d-a6db-4a88-a889-cac1036708d3
DTSTAMP:20210308T215704Z
CREATED:20210108T172437Z
DESCRIPTION:Topic: Spatially Resolved Stellar Spectroscopy of the Ultra-dif
fuse Galaxy Dragonfly 44. III. Evidence for an Unexpected Star-Formation H
istory\n\nSpeakers: Alexa Villaume\n\nAffiliation: University of Waterloo
\n\nEach week\, we hold a relatively informal seminar/discussion series\nw
ith an emphasis on extra-galactic and large-scale structure\nastrophysics.
\n\nDuring Galread a leader/visitor presents a recent paper to the\ndiscus
sion group. The PDF of the paper is projected onto a large\nscreen\, and a
guest explains the paper\, section by section\, in greater\ndetail than m
ay be explained within the text of the article. To aid\nwith discussion\,
only the article PDF is presented -- no\npowerpoint-style slides. Galread
discussions are very friendly and\ninteractive.\n
DTSTART:20210111T160000Z
DTEND:20210111T170000Z
LAST-MODIFIED:20210108T190409Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group
END:VEVENT
BEGIN:VEVENT
UID:6d7addbe-6b4a-4b02-b304-9211d82561ad
DTSTAMP:20210308T215704Z
CREATED:20210108T143636Z
DESCRIPTION:Topic: Formation and evolution of protostellar accretion discs
\n\nSpeakers: Wenrui Xu\n\nAffiliation: Princeton University\n\nWe investi
gate the formation and early evolution of a protostellar\ndisc from a magn
etized pre-stellar core using non-ideal\nmagnetohydrodynamic (MHD) simulat
ions including ambipolar diffusion\nand Ohmic dissipation. The dynamical c
ontraction of the pre-stellar\ncore ultimately leads to the formation of a
first hydrostatic core\,\nafter ambipolar diffusion decouples the magneti
c field from the\npredominantly neutral gas. The hydrostatic core accumula
tes angular\nmomentum from the infalling material\, evolving into a rotati
onally\nsupported torus\; this `first hydrostatic torus' then forms an\nac
creting protostar and a rotationally supported disc. The disc\nspreads out
by gravitational instability\, reaching ∼30 au in\ndiameter at ∼3 kyr aft
er protostar formation. The total mass and\nangular momentum of the protos
tar-disc system are determined mainly by\naccretion of gas from an infalli
ng pseudo-disc\, which has low specific\nangular momentum because of magne
tic braking\; their removal from the\nprotostar-disc system by outflow and
disc magnetic braking are\nnegligible\, in part because the magnetic fiel
d is poorly coupled\nthere. The redistribution of angular momentum within
the\nprotostar-disc system is facilitated mainly by gravitational\ninstabi
lity\; this allows formation of relatively large discs even when\nthe spec
ific angular momentum of infalling material is low. We argue\nthat such di
scs should remain marginally unstable as they grow (with\nToomre Q∼1-2)\,
an idea that is broadly consistent with recent\nobservational estimates fo
r Class 0/I discs. We discuss the numerical\nconvergence of our results\,
and show that properly treating the inner\nboundary condition is crucial f
or achieving convergence at an\nacceptable computational cost.\n
DTSTART:20210111T171500Z
DTEND:20210111T181500Z
LAST-MODIFIED:20210205T141923Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-9
END:VEVENT
BEGIN:VEVENT
UID:feecb791-7588-4090-993c-a1c2629a7f40
DTSTAMP:20210308T215704Z
CREATED:20200924T162052Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210111T190000Z
DTEND:20210111T200000Z
LAST-MODIFIED:20210105T200113Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-348
END:VEVENT
BEGIN:VEVENT
UID:4c1e4956-52c7-4b52-a608-5760e81ccfe2
DTSTAMP:20210308T215704Z
CREATED:20210105T210127Z
DESCRIPTION:Topic: The ground state energy of dilute Bose gases\n\nSpeakers
: Soeren Fournais\n\nAffiliation: Aarhus University\; Member\, School of M
athematics\n\nThe rigorous calculation of the ground state energy of dilut
e Bose\ngases has been a challenging problem since the 1950s. In particula
r\,\nit is of interest to understand the extent to which the Bogoliubov\np
airing theory correctly describes the ground state of this physical\nsyste
m. In this talk I will report on a recent proof of the second\nterm in the
energy expansion for dilute gases\, the so-called\nLee-Huang-Yang term\,
and its relation to Bogoliubov theory.\n
DTSTART:20210111T213000Z
DTEND:20210111T223000Z
LAST-MODIFIED:20210111T151308Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-131
END:VEVENT
BEGIN:VEVENT
UID:a1505324-3e29-4587-b119-b7913a20f6ff
DTSTAMP:20210308T215704Z
CREATED:20210105T220654Z
DESCRIPTION:Topic: Presheaves and the Yoneda lemma\n\nSpeakers: Robin Carli
er\n\nAffiliation: École normale supérieure de Lyon\n\n
DTSTART:20210112T183000Z
DTEND:20210112T203000Z
LAST-MODIFIED:20210105T230611Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-10
END:VEVENT
BEGIN:VEVENT
UID:805fea60-b477-4671-af21-9168f75be85c
DTSTAMP:20210308T215704Z
CREATED:20210106T220848Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210112T200000Z
DTEND:20210112T220000Z
LAST-MODIFIED:20210107T173704Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-8
END:VEVENT
BEGIN:VEVENT
UID:a0a6cbc5-83d1-45bb-8ab5-3db491d0f6b9
DTSTAMP:20210308T215704Z
CREATED:20210108T150720Z
DESCRIPTION:Topic: The Fourth Condition: A Spyglass Drama\n\nSpeakers: John
Church\, Bob Vanderbei\, Bill Murray\n\nOur guest speaker will be member
John Church\, whose talk is entitled\,\n“The Fourth Condition: A Spyglass
Drama.” John’s presentation\nwill summarize the steps leading up to the de
sign of well-corrected\ndoublet achromatic refractor objectives. Also spea
king will be AAAP\nmember and Princeton University faculty member Bob Vand
erbei\, who will\nshow some of his excellent and timely astrophotos and ex
plain how he\naccomplished them. In addition\, AAAP member Bill Murray wil
l tell the\nstory of Project Diana\, in which a small local team of radar
experts\nfirst probed a celestial body by bouncing radar pulses off the Mo
on.\n
DTSTART:20210113T003000Z
DTEND:20210113T023000Z
LAST-MODIFIED:20210108T151108Z
LOCATION:Virtual Meeting
SUMMARY:Amateur Astronomers Association of Princeton (AAAP) Monthly Meeting
URL:https://www.ias.edu/sns/events/amateur-astronomers-association-princeto
n-aaap-monthly-meeting-0
END:VEVENT
BEGIN:VEVENT
UID:1f019fa8-9209-46af-9c9a-0b3824789bb8
DTSTAMP:20210308T215704Z
CREATED:20200901T214744Z
DESCRIPTION:Topic: The PCP theorem\, locally testable codes\, and property
testing\n\nSpeakers: Irit Dinur\n\nAffiliation: Weizmann Institute of Scie
nce\n\nIn this lecture I will describe the three concepts appearing in the
\ntitle and how they connect with each other.
DTSTART:20210113T160000Z
DTEND:20210113T171500Z
LAST-MODIFIED:20210113T140916Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-9
END:VEVENT
BEGIN:VEVENT
UID:86903b7b-1e12-4d48-a97b-812bf11c7dc7
DTSTAMP:20210308T215704Z
CREATED:20210106T001607Z
DESCRIPTION:Topic: Introduction to Smith theory\n\nSpeakers: Tony Feng\n\nA
ffiliation: Member\, School of Mathematics\n\nSmith theory is a type of eq
uivariant localization with respect to a\ncyclic group of prime order $p$\
, with coefficients in a field of the\nsame characteristic $p$. It has bee
n the source of various recent\nadvances in modular representation theory
and mod $p$ Langlands\nfunctoriality\, some of which will be discussed lat
er in the seminar. I\nwill give an introduction to the basic formalism.\n
DTSTART:20210113T200000Z
DTEND:20210113T220000Z
LAST-MODIFIED:20210108T010218Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-13
END:VEVENT
BEGIN:VEVENT
UID:883238c0-6c06-4998-bc82-84f384da71ae
DTSTAMP:20210308T215704Z
CREATED:20200806T232258Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210113T223000Z
DTEND:20210114T000000Z
LAST-MODIFIED:20210108T190203Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-195
END:VEVENT
BEGIN:VEVENT
UID:9566a4c7-37e8-4bc3-9255-fc19aa02509d
DTSTAMP:20210308T215704Z
CREATED:20201210T012943Z
DESCRIPTION:
DTSTART:20210114T150000Z
DTEND:20210114T170000Z
LAST-MODIFIED:20210106T041336Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-12
END:VEVENT
BEGIN:VEVENT
UID:8b8d4d7b-8f4a-4d96-aa58-8010fb43e9a5
DTSTAMP:20210308T215704Z
CREATED:20210106T005948Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210114T213000Z
DTEND:20210114T223000Z
LAST-MODIFIED:20210108T165126Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-434
END:VEVENT
BEGIN:VEVENT
UID:664ce11d-0769-4624-a379-032ce82432e5
DTSTAMP:20210308T215704Z
CREATED:20210106T020827Z
DESCRIPTION:Topic: Symplectic implosion\n\nSpeakers: Lisa Jeffrey\n\nAffili
ation: University of Toronto\n\nSymplectic implosion was developed to solv
e the problem that the\nsymplectic cross-section of a Hamiltonian $K$-spac
e is usually not\nsymplectic\, when $K$ is a compact Lie group. The symple
ctic implosion\nis a stratified symplectic space\, introduced in a 2002 pa
per of the\nspeaker with Guillemin and Sjamaar. I survey some examples sho
wing how\nsymplectic implosion has been used. I describe the universal imp
loded\ncross-section\, which is the imploded cross-section of the cotangen
t\nbundle of a compact Lie group. Imploded cross-sections are normally\nno
t smooth manifolds. We describe some invariants (for example\nintersection
homology) which replace homology for singular stratified\nspaces. (Joint
work with Sina Zabanfahm)
DTSTART:20210115T141500Z
DTEND:20210115T154500Z
LAST-MODIFIED:20210115T145201Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-54
END:VEVENT
BEGIN:VEVENT
UID:f3ed0763-fb62-4156-aa92-f603bc088e92
DTSTAMP:20210308T215704Z
CREATED:20210114T150953Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210118T171500Z
DTEND:20210118T181500Z
LAST-MODIFIED:20210205T141943Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-10
END:VEVENT
BEGIN:VEVENT
UID:4a4fec5d-9320-4883-a254-13117fa4f72f
DTSTAMP:20210308T215704Z
CREATED:20200924T162057Z
DESCRIPTION:Topic: No seminar: MLK Jr. Day\n\n
DTSTART:20210118T190000Z
DTEND:20210118T200000Z
LAST-MODIFIED:20210105T200133Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-349
END:VEVENT
BEGIN:VEVENT
UID:ca6df07e-320f-4d0c-9595-261d4b53a58d
DTSTAMP:20210308T215704Z
CREATED:20210105T211830Z
DESCRIPTION:Topic: No seminar: MLK Jr. Day\n\n
DTSTART:20210118T213000Z
DTEND:20210118T223000Z
LAST-MODIFIED:20210106T192826Z
LOCATION:
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-132
END:VEVENT
BEGIN:VEVENT
UID:ed5ee4a2-700c-4b2f-9b6a-37ea325708ec
DTSTAMP:20210308T215704Z
CREATED:20210105T221531Z
DESCRIPTION:Topic: Adjoint functors\n\nSpeakers: Emanuel Reinecke\n\nAffili
ation: Member\, School of Mathematics\n\n
DTSTART:20210119T183000Z
DTEND:20210119T203000Z
LAST-MODIFIED:20210105T224957Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-11
END:VEVENT
BEGIN:VEVENT
UID:d533266d-7d46-444b-a281-9cf96d2dabb1
DTSTAMP:20210308T215704Z
CREATED:20210106T221901Z
DESCRIPTION:Topic: A categorical approach to representations in defining ch
aracteristic\n\nSpeakers: Nate Harman\n\nAffiliation: Member\, School of M
athematics\n\nLet $G$ be an algebraic group defined over a finite field $F
_q$.\nThrough the lens of Tannakian formalism I will give a categorical\nd
escription of the relationship between the representation theory of\nthe a
lgebraic group $G$ and the representation theory of the finite\ngroup $G(F
_q)$ in defining characteristic.\n
DTSTART:20210119T200000Z
DTEND:20210119T220000Z
LAST-MODIFIED:20210120T001800Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-9
END:VEVENT
BEGIN:VEVENT
UID:d149afaf-5187-4399-85d0-82d2dc5f70e1
DTSTAMP:20210308T215704Z
CREATED:20210105T232236Z
DESCRIPTION:Topic: Stability and Invariant Random Subgroups\n\nSpeakers: He
nry Bradford\n\nAffiliation: Cambridge University\n\nDetermining whether o
r not a given finitely generated group is\npermutation stable is in genera
l a difficult problem. In this talk we\ndiscuss work of Becker\, Lubotzky
and Thom which gives\, in the case of\namenable groups\, a necessary and s
ufficient condition for permutation\nstability in terms of the invariant r
andom subgroups (IRSs) of the\ngroup. We outline some ideas from the proof
of this criterion\, give an\nintroduction to IRSs in general\, and show h
ow they yield new families\nof examples of stable and unstable groups.
DTSTART:20210120T160000Z
DTEND:20210120T171500Z
LAST-MODIFIED:20210120T133546Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-10
END:VEVENT
BEGIN:VEVENT
UID:3e166e9b-db63-4cdf-99c2-54db67801f42
DTSTAMP:20210308T215704Z
CREATED:20210106T002831Z
DESCRIPTION:Topic: The linkage principle and the tilting character formula
via Smith-Treumann theory\n\nSpeakers: Daniel Juteau\n\nAffiliation: CNRS\
, Université Paris Diderot\; Member\, School of Mathematics\n\nThe linkage
principle says that the category of representations of a\nreductive group
$G$ in positive characteristic decomposes into\n'blocks' controlled by th
e affine Weyl group. We will discuss the\nbeautiful geometric proof of thi
s result that Simon Riche and Geordie\nWilliamson obtained by applying Smi
th-Treumann theory to the\nIwahori-Whittaker model of the Satake category.
.. and\, as a bonus\, a\ntilting character formula valid for all dominant
weights and all\ncharacteristics!\n\n \n\nVideo\nLink: https://www.ias.edu
/video/linkage-principle-and-tilting-character-formula-smith-treumann-theo
ry\n
DTSTART:20210120T200000Z
DTEND:20210120T220000Z
LAST-MODIFIED:20210120T134742Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-14
END:VEVENT
BEGIN:VEVENT
UID:1632bf88-3672-4d78-bf7a-fcaecd1cff16
DTSTAMP:20210308T215704Z
CREATED:20210106T004649Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210120T223000Z
DTEND:20210121T000000Z
LAST-MODIFIED:20210108T190256Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-196
END:VEVENT
BEGIN:VEVENT
UID:352f816a-6094-477f-b3bb-1ccf94309b3f
DTSTAMP:20210308T215704Z
CREATED:20201210T012957Z
DESCRIPTION:
DTSTART:20210121T150000Z
DTEND:20210121T170000Z
LAST-MODIFIED:20210106T041435Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-13
END:VEVENT
BEGIN:VEVENT
UID:ef78a423-9891-400f-9afc-8a12b319480a
DTSTAMP:20210308T215704Z
CREATED:20210107T003220Z
DESCRIPTION:Topic: Introduction to quantized enveloping algebras\n\nSpeaker
s: Leonardo Maltoni\n\nAffiliation: Sorbonne University\n\nThis talk cover
s Chapters 4 and 5 in Jantzen's book.\n
DTSTART:20210121T210000Z
DTEND:20210121T230000Z
LAST-MODIFIED:20210121T183547Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar
END:VEVENT
BEGIN:VEVENT
UID:aa52036a-0650-4213-a445-71f00507bdbc
DTSTAMP:20210308T215704Z
CREATED:20210106T010644Z
DESCRIPTION:Topic: Ax-Lindemann-Weierstrass Theorem (ALW) for Fuchsian auto
morphic functions\n\nSpeakers: Joel Nagloo\n\nAffiliation: City University
of New York\n\nOver the last decades\, following works around the Pila-Wi
lkie counting\ntheorem in the context of o-minimality\, there has been a s
urge in\ninterest around functional transcendence results\, in part due to
their\nconnection with special points conjectures. A prime example is Pil
a's\nmodular ALW Theorem and its role in his proof of the André-Oort\nconj
ecture.\n\nIn this talk we will discuss how an entirely new approach\, usi
ng the\nmodel theory of differential fields\, can be used to prove the\nAx
-Lindemann-Weierstrass (ALW) Theorem with derivatives for Fuchsian\nautomo
rphic functions - a direct generalization of Pila’s ALW\ntheorem. We will
also explain how new cases of the André-Pink\nconjecture can be obtained u
sing this new approach. This is joint work\nwith G. Casale and J. Freitag.
\n
DTSTART:20210121T213000Z
DTEND:20210121T223000Z
LAST-MODIFIED:20210121T174127Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-435
END:VEVENT
BEGIN:VEVENT
UID:7cec84b6-9793-4553-b078-8527831947d1
DTSTAMP:20210308T215704Z
CREATED:20210106T021753Z
DESCRIPTION:Topic: Pseudo-rotations vs. rotations\n\nSpeakers: Başak Gürel
\n\nAffiliation: University of Central Florida\n\nThe talk will focus on t
he question of whether existing symplectic\nmethods can distinguish pseudo
-rotations from rotations (i.e.\,\nelements of Hamiltonian circle actions)
. For the projective plane\, in\nmany instances\, but not always\, the ans
wer is negative. Namely\, for\nvirtually every pseudo-rotation there exist
s a unique rotation with\nprecisely the same fixed-point data. However\, t
he hypothetical\nexceptions—ghost pseudo-rotations—suggest that the relati
on\nbetween the two classes of maps might be much weaker than previously\n
thought\, possibly leading to some unexpected consequences. This is\nbased
on joint work with Viktor Ginzburg.\n
DTSTART:20210122T141500Z
DTEND:20210122T154500Z
LAST-MODIFIED:20210122T144510Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-55
END:VEVENT
BEGIN:VEVENT
UID:79910e7b-52dc-453b-b625-a0ea00b67737
DTSTAMP:20210308T215704Z
CREATED:20210114T175620Z
DESCRIPTION:Topic: Violation of the zeroth law of turbulence in space plasm
as.\n\nSpeakers: Romain Meyrand\n\nAffiliation: University of Otago\n\nThe
movement and thermalization of turbulent energy between scales in\nplasma
s is both fundamentally interesting and important for a wide\nrange of mod
elling applications. In strongly magnetized space plasmas\,\nenergy in ele
ctromagnetic fluctuations is usually assumed to flow to\nthe smallest scal
es\, eventually heating electrons. During this talk I\nwill show that when
turbulence is dominated by outward-propagating\nperturbations\, as occurs
in the solar wind\, the energy hits a\n“barrier” near the iongyroradius s
cale. The effect violates the\n“zeroth law of turbulence\,” which states t
hat large-scale\nturbulent statistics are independent of microphysical dis
sipation\,\nsuggesting interesting implications for plasma thermodynamics.
It also\nprovides a testable explanation for the long-standing puzzle of
what\ndetermines the scale and slope of the “ion-kinetic transition” in\no
bserved magnetic- energy spectra.\n
DTSTART:20210122T173000Z
DTEND:20210122T190000Z
LAST-MODIFIED:20210205T163845Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-1
END:VEVENT
BEGIN:VEVENT
UID:2f5111e2-bf83-410a-a782-be9600079677
DTSTAMP:20210308T215704Z
CREATED:20210115T162103Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210122T200000Z
DTEND:20210122T210000Z
LAST-MODIFIED:20210115T162211Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-2
END:VEVENT
BEGIN:VEVENT
UID:b18abfce-c01a-4289-86f0-4491edec7a84
DTSTAMP:20210308T215704Z
CREATED:20210114T141007Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Ben Horowitz\n\nAffiliation: Princeton
University\n\nEach week\, we hold a relatively informal seminar/discussion
series\nwith an emphasis on extra-galactic and large-scale structure\nast
rophysics.\n\nDuring Galread a leader/visitor presents a recent paper to t
he\ndiscussion group. The PDF of the paper is projected onto a large\nscre
en\, and a guest explains the paper\, section by section\, in greater\ndet
ail than may be explained within the text of the article. To aid\nwith dis
cussion\, only the article PDF is presented -- no\npowerpoint-style slides
. Galread discussions are very friendly and\ninteractive.\n
DTSTART:20210125T160000Z
DTEND:20210125T170000Z
LAST-MODIFIED:20210114T143229Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-0
END:VEVENT
BEGIN:VEVENT
UID:2871cb56-ee64-4d93-bacb-3e8aa82cbefa
DTSTAMP:20210308T215704Z
CREATED:20201102T125150Z
DESCRIPTION:Topic: An Improved Exponential-Time Approximation Algorithm for
Fully-Alternating Games Against Nature\n\nSpeakers: Andrew Drucker\n\nAff
iliation: University of Chicago\n\n'Games against Nature' [Papadimitriou '
85] are two-player games of\nperfect information\, in which one player's m
oves are made randomly.\nEstimating the value of such games (i.e.\, winnin
g probability under\noptimal play by the strategic player) is an important
goal in the\nstudy of decision-making under uncertainty. The problem's\n
PSPACE-completeness does not rule out non-trivial algorithms\, a goal\nful
filled in certain cases by Littman\, Majercik\, and Pitassi [LMP\n'01]. \n
\nWe study the case in which the players strictly alternate with binary\nm
oves\, for which [LMP '01] does not give a general speedup. We give a\nran
domized algorithm to approximate the value of such games (and to\nproduce
near-optimal play) . Our algorithm achieves exponential\nsavings over brut
e-force\, making 2^{(1-delta)n} queries to the input\ngame's lookup table
for some absolute constant delta > 0\, and\ncertifies a lower bound on the
game value with exponentially-small\nexpected additive error. (On the dow
nside\, delta is tiny and the\nalgorithm uses exponential space.)\n\nOur a
lgorithm is recursive\, and bootstraps a 'base-case' algorithm for\nfixed-
size inputs. The base-case algorithm and the form of recursive\ncompositio
n used are interesting and\, we feel\, likely to find uses\nbeyond the pre
sent work.\n
DTSTART:20210125T161500Z
DTEND:20210125T171500Z
LAST-MODIFIED:20210125T154319Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-471
END:VEVENT
BEGIN:VEVENT
UID:eb8ae73b-f909-44c6-a6ed-01bf61e7ec3d
DTSTAMP:20210308T215704Z
CREATED:20210114T151101Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210125T171500Z
DTEND:20210125T181500Z
LAST-MODIFIED:20210205T142201Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-17
END:VEVENT
BEGIN:VEVENT
UID:d9ba6d16-8150-4bb6-ab9a-b0434379c532
DTSTAMP:20210308T215704Z
CREATED:20210114T143953Z
DESCRIPTION:Topic: Measurements of the kinetic Sunyaev Zel'dovich effect wi
thout bias from velocity reconstruction: a forward modeling approach\n\nSp
eakers: Minh Nguyen\n\nAffiliation: Max-Planck-Institut für Astrophysik\n
\nAbstract: Upcoming CMB experiments with ever-increasing sensivities\npro
mise to turn the kinematic Sunyaev-Zel'dovich (kSZ) effect into a\npowerfu
l probes for not only astrophysics but also cosmology. The\ncatch is that
our measurements and inferences will demand a much finer\nmodeling of syst
ematics. One source of systematics that has been\nignored so far is that c
oming from the velocity reconstruction in\nkSZ--galaxy cross analyses. In
this talk\, I show that the forward\nmodeling approach to galaxy clusterin
g routinely allows for that\, and\nintroduce a velocity-marginalized likel
ihood for kSZ in this type of\nanalysis. I then demonstrate how this likel
ihood yields an optimal and\nunbiased inference from kSZ measurements (arX
iv:2007.13721). Finally\,\nI address how robust such an analysis is to the
details of the\nphysical data model in the forward modeling (arXiv:2011.0
6587).\n\nReference:\n\n1/ https://iopscience.iop.org/article/10.1088/1475
-7516/2020/12/011\n\n2/ https://arxiv.org/abs/2011.06587\n
DTSTART:20210125T173000Z
DTEND:20210125T190000Z
LAST-MODIFIED:20210120T164047Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion
END:VEVENT
BEGIN:VEVENT
UID:b9f9bdcd-0ad4-4f58-a4e7-538ba3d55e52
DTSTAMP:20210308T215704Z
CREATED:20201209T231542Z
DESCRIPTION:Topic: A nonabelian Brunn-Minkowski inequality\n\nSpeakers: Rui
xiang Zhang\n\nAffiliation: University of Wisconsin-Madison\; Member\, Sch
ool of Mathematics\n\nThe celebrated Brunn-Minkowski inequality states tha
t for compact\nsubsets $X$ and $Y$ of $\Bbb{R}^d$\, $m(X+Y)^{1/d} \geq\nm(
X)^{1/d}+m(Y)^{1/d}$ where $m(\cdot)$ is the Lebesgue measure. We\nwill in
troduce a conjecture generalizing this inequality to every\nlocally compac
t group where the exponent is believed to be sharp. In a\njoint work with
Yifan Jing and Chieu-Minh Tran\, we prove this\nconjecture for a large cla
ss of groups (including e.g. all real linear\nalgebraic groups). We also p
rove that the general conjecture will\nfollow from the simple Lie group ca
se. For those groups where we do\nnot know the conjecture yet (one typical
example being the universal\ncovering of $SL_2(\Bbb{R})$)\, we also obtai
n partial results. In this\ntalk I will discuss this inequality and explai
n important ingredients\,\nold and new\, in our proof.\n
DTSTART:20210125T190000Z
DTEND:20210125T200000Z
LAST-MODIFIED:20210125T193835Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-212
END:VEVENT
BEGIN:VEVENT
UID:5f7f9130-5d9c-4085-8ad5-4d68dad4e234
DTSTAMP:20210308T215704Z
CREATED:20210105T211845Z
DESCRIPTION:Topic: Bogoliubov theory for trapped Bose-Einstein condensates
\n\nSpeakers: Benjamin Schlein\n\nAffiliation: University of Zurich\n\nWe
consider systems of $N$ particles interacting through a repulsive\npotenti
al in the Gross-Pitaevskii regime. We prove complete\nBose-Einstein conden
sation and we determine the form of the low-energy\nspectrum\, in the limi
t of large $N$. Our results confirm the\npredictions of Bogoliubov theory.
This talk is based on joint works\nwith C. Boccato\, C. Brennecke and S.
Cenatiempo.\n
DTSTART:20210125T213000Z
DTEND:20210125T223000Z
LAST-MODIFIED:20210125T194106Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-133
END:VEVENT
BEGIN:VEVENT
UID:740ca6ef-c67f-435b-b2a0-17902c82d9e3
DTSTAMP:20210308T215704Z
CREATED:20201105T141350Z
DESCRIPTION:Topic: Log-concave polynomials in theory and applications\n\nSp
eakers: Cynthia Vinzant\n\nAffiliation: Member\, School of Mathematics\n\n
A polynomial with nonnegative coefficients is strongly log-concave if\nit
and all of its derivatives are log-concave as functions on the\npositive o
rthant. This rich class of polynomials includes many\ninteresting examples
\, such as homogeneous real stable polynomials and\nmixed volume polynomia
ls of convex bodies. Its structure is intimately\nrelated to combinatorial
objects called matroids and generalized\npermutahedra. This theory gives
powerful tools for showing discrete\nlog-concavity of finite sequences. Di
stributions coming from the\ncoefficients of such polynomials can also be
approximately sampled. In\nthis talk I will go over the structural propert
ies of this rich class\nof real polynomials and discuss applications in co
mbinatorics and\ncomputer science.\n\nThis talk is based on joint work wit
h Nima Anari\, Kuikui Liu and\nShayan Oveis Gharan.\n
DTSTART:20210126T153000Z
DTEND:20210126T173000Z
LAST-MODIFIED:20210126T145659Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-466
END:VEVENT
BEGIN:VEVENT
UID:044beb11-453e-4866-b654-9fc085eb9588
DTSTAMP:20210308T215704Z
CREATED:20210105T221548Z
DESCRIPTION:Topic: Accessible and presentable ∞-categories\n\nSpeakers: Sop
hie Morel\n\nAffiliation: École normale supérieure de Lyon\n\n
DTSTART:20210126T183000Z
DTEND:20210126T203000Z
LAST-MODIFIED:20210105T225018Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-12
END:VEVENT
BEGIN:VEVENT
UID:58cb3649-a9d4-46c5-b8d0-51e66335be27
DTSTAMP:20210308T215704Z
CREATED:20210106T221918Z
DESCRIPTION:Topic: Why do we care about characters of tilting modules?\n\nS
peakers: Shotaro Makisumi\n\nAffiliation: Columbia University\; Member\, S
chool of Mathematics\n\nI will explain the basics of tilting modules for r
eductive algebraic\ngroups and why we should care about their characters.
In particular\, I\nwill discuss Donkin's tensor product theorem and the re
lation to\nmodular representations of symmetric groups. The latter will pr
ovide\nmotivation for our focus on tilting characters for $SL_3$ in future
\ntalks of this seminar.\n
DTSTART:20210126T200000Z
DTEND:20210126T220000Z
LAST-MODIFIED:20210120T155228Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-10
END:VEVENT
BEGIN:VEVENT
UID:97c1c7fc-5011-4eef-8103-102653c5451d
DTSTAMP:20210308T215705Z
CREATED:20210105T233015Z
DESCRIPTION:Topic: Stability of amenable groups via ergodic theory\n\nSpeak
ers: Arie Levit \n\nAffiliation: Yale University\n\nI will describe how ba
sic ergodic theory can be used to prove that\ncertain amenable groups are
stable. I will demonstrate our method by\nshowing that lamplighter groups
are stable. Another uncountably\ninfinite family to which our method appli
es are the so-called B.H.\nNeumann groups. This is the first construction
of an uncountable\nfamily of stable groups. The talk is based on joint wor
k with Alex\nLubotzky\, relying on the Invariant-Random-Subgroup criterion
for\nstability developed by Becker-Lubotzky-Thom.
DTSTART:20210127T160000Z
DTEND:20210127T171500Z
LAST-MODIFIED:20210127T142451Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-11
END:VEVENT
BEGIN:VEVENT
UID:38c8965f-288a-459c-8328-d6d637e8e6aa
DTSTAMP:20210308T215705Z
CREATED:20210106T002850Z
DESCRIPTION:Topic: The Hecke category action on the principal block via Smi
th theory\n\nSpeakers: Geordie Williamson\n\nAffiliation: University of Sy
dney\; Distinguished Visiting Professor\, School of Mathematics\n\nWall-cr
ossing functors on the principal block of category $O$ give an\naction of
the (finite) Hecke category. If one knows enough about the\nHecke category
\, one can deduce the Kazhdan-Lusztig conjectures from\nthe existence of t
his action. This is a simple example of the power of\ncategorification. In
2013\, Riche and I conjectured that something\nsimilar is true for the pr
incipal block of reductive algebraic groups:\nnamely that wall-crossing fu
nctors give an action of the (affine)\nHecke category. We showed that the
conjecture implies several rather\ndeep statements in representation theor
y (mod $p$ analogues of the\nKazhdan-Lusztig conjectures). Recently\, this
conjecture has been\nproved in two different ways: the first (by Bezrukav
nikov and Riche)\nvia mod $p$ localization and the second (by my student J
osh Ciappara)\nvia Smith theory. I will give an outline of Josh's proof.\n
Bezrukavnikov and Riche's proof will be discussed later in the\nseminar.\n
DTSTART:20210127T200000Z
DTEND:20210127T220000Z
LAST-MODIFIED:20210122T153830Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-15
END:VEVENT
BEGIN:VEVENT
UID:dc2233d0-9c08-4c74-823f-64e7577e7a8a
DTSTAMP:20210308T215705Z
CREATED:20210106T004707Z
DESCRIPTION:Topic: Möbius Disjointness\n\nSpeakers: Peter Sarnak\n\nAffilia
tion: Professor\, School of Mathematics\n\nThe Möbius function $\mu(n)$ me
asures the parity of number of prime\nfactors of $n$ (if $n$ is square fre
e). Understanding the randomness\nin this function (often referred to as t
he Möbius randomness\nprinciple) is a fundamental and very difficult probl
em. A basic\nconjecture concerns the disjointness of this sequence from ob
servables\nin zero entropy dynamical systems. We review the formulation\,
\nintuition\, and a few of the many recent advances around the\nconjecture
.\n
DTSTART:20210127T223000Z
DTEND:20210128T000000Z
LAST-MODIFIED:20210125T190433Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-197
END:VEVENT
BEGIN:VEVENT
UID:8b4c13a5-01df-4dcc-acd2-38b2d16a86bc
DTSTAMP:20210308T215705Z
CREATED:20201210T013011Z
DESCRIPTION:
DTSTART:20210128T150000Z
DTEND:20210128T170000Z
LAST-MODIFIED:20210106T041533Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-14
END:VEVENT
BEGIN:VEVENT
UID:cf76f5b0-dd99-4144-9f7b-d87bece4e31f
DTSTAMP:20210308T215705Z
CREATED:20210114T170759Z
DESCRIPTION:Topic: What regulates the star formation process in galaxies?\n
\nSpeakers: Shmuel Bialy\n\nAffiliation: Harvard ITC\n\nI will discuss the
multiphase structure of the ISM\, heating-cooling\nprocesses\, and turbul
ence\, all of which may play an important role in\nregulating star formati
on. I will focus on a particularly appealing\ntheory in which far-UV radia
tion from massive stars introduces a\nnatural self-regulation process for
star-formation\, and will present\nrecent results (Bialy 2020) for the int
imate link between\nstar-formation rate and the far-UV radiation intensity
in the ISM. I\nwill conclude by discussing promising future directions\,
charting new\nways for constraining poorly known interstellar properties:
\nturbulence\, 3D ISM structure\, and the nature of low energy\ncosmic-ray
s.\n
DTSTART:20210128T183000Z
DTEND:20210128T193000Z
LAST-MODIFIED:20210120T164544Z
LOCATION:Virtual Meeting
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
4
END:VEVENT
BEGIN:VEVENT
UID:22d9bc86-c8d1-4fc2-b1ac-80893e3d8c7c
DTSTAMP:20210308T215705Z
CREATED:20201208T195814Z
DESCRIPTION:Topic: Exponential Exact Algorithms for NP Complete Problems\n
\nSpeakers: Or Zamir\n\nAffiliation: Member\, School of Mathematics\n\n
DTSTART:20210128T200000Z
DTEND:20210128T201500Z
LAST-MODIFIED:20210128T154522Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-532
END:VEVENT
BEGIN:VEVENT
UID:5046331b-d48a-4e8a-b93e-3ebcba5c4d15
DTSTAMP:20210308T215705Z
CREATED:20201208T195549Z
DESCRIPTION:Topic: Distribution properties of Hodge and Tate loci.\n\nSpeak
ers: Salim Tayou\n\nAffiliation: Member\, School of Mathematics\n\n
DTSTART:20210128T202000Z
DTEND:20210128T203500Z
LAST-MODIFIED:20210128T154701Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-531
END:VEVENT
BEGIN:VEVENT
UID:45a1acbe-eca2-4dde-9dfa-5b1d183148de
DTSTAMP:20210308T215705Z
CREATED:20201208T194912Z
DESCRIPTION:Topic: Cohomology of Arithmetic Groups and Endoscopy\n\nSpeaker
s: Mathlide Gerbelli-Gauthier\n\nAffiliation: Member\, School of Mathemati
cs\n\n
DTSTART:20210128T204000Z
DTEND:20210128T205500Z
LAST-MODIFIED:20210128T154845Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-530
END:VEVENT
BEGIN:VEVENT
UID:a53045e0-42b6-4676-b327-870d2f0cae62
DTSTAMP:20210308T215705Z
CREATED:20210107T004824Z
DESCRIPTION:Topic: Introduction to quantized enveloping algebras\n\nSpeaker
s: Leonardo Maltoni\n\nAffiliation: Sorbonne University\n\nContinuation of
the talk from last time.\n
DTSTART:20210128T210000Z
DTEND:20210128T230000Z
LAST-MODIFIED:20210129T143006Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-0
END:VEVENT
BEGIN:VEVENT
UID:2eb3e548-8371-4606-937a-7fb81fc06ee3
DTSTAMP:20210308T215705Z
CREATED:20210106T010706Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210128T213000Z
DTEND:20210128T223000Z
LAST-MODIFIED:20210120T002233Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-436
END:VEVENT
BEGIN:VEVENT
UID:35f784e9-be98-4572-a8f6-f874acab77af
DTSTAMP:20210308T215705Z
CREATED:20210106T021810Z
DESCRIPTION:Topic: Three 20 minute research talks\n\nSpeakers: Alexandre Ja
nnaud\, Tim Large\, Oliver Edtmair\n\nAffiliation: Sorbonne University\; M
assachusetts Institute of Technology\; University of California\, Berkeley
\n\nALEXANDRE JANNAUD (SORBONNE)\, _Dehn-Seidel twist\, $C^0$ symplectic\n
geometry and barcodes_\n_Abstract: _In this talk I will present my work in
itiating the study\nof the $C^0$ symplectic mapping class group\, i.e. the
group of isotopy\nclasses of symplectic homeomorphisms\, and briefly pres
ent the proofs\nof the first results regarding the topology of the group o
f symplectic\nhomeomorphisms. For that purpose\, we will introduce a metho
d coming\nfrom Floer theory and barcodes theory. Applying this strategy to
the\nDehn-Seidel twist\, a symplectomorphism of particular interest when
\nstudying the symplectic mapping class group\, we will generalize to\n$C^
0$ settings a result of Seidel concerning the non-triviality of the\nmappi
ng class of this symplectomorphism. We will indeed prove that the\ngeneral
ized Dehn twist is not in the connected component of the\nidentity in the
group of symplectic homeomorphisms. Doing so\, we prove\nthe non-trivialit
y of the $C^0$ symplectic mapping class group of some\nLiouville domains.
\n\nTIM LARGE (MIT)\, Floer K-theory and exotic Liouville manifolds\n\nOLI
VER EDTMAIR (BERKELEY)\, _3D convex contact forms and the Ruelle\ninvarian
t\nAbstract: _Is every dynamically convex contact form on the three\nspher
e convex? In this talk I will explain why the answer to this\nquestion is
no. The strategy is to derive a lower bound on the Ruelle\ninvariant of co
nvex contact forms and construct dynamically convex\ncontact forms violati
ng this lower bound. This is based on joint work\nwith Julian Chaidez.\n
DTSTART:20210129T141500Z
DTEND:20210129T154500Z
LAST-MODIFIED:20210129T145111Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-56
END:VEVENT
BEGIN:VEVENT
UID:7effc517-c088-4863-a023-e3cab760d86e
DTSTAMP:20210308T215705Z
CREATED:20210114T141232Z
DESCRIPTION:Topic: Stellar Wind Bubbles in Turbulent Clouds: A Fractal Theo
ry Validated with Hydrodynamic Simulations\n\nSpeakers: Lachlan Lancaster
\n\nAffiliation: Princeton University\n\nEach week\, we hold a relatively
informal seminar/discussion series\nwith an emphasis on extra-galactic and
large-scale structure\nastrophysics.\n\nDuring Galread a leader/visitor p
resents a recent paper to the\ndiscussion group. The PDF of the paper is p
rojected onto a large\nscreen\, and a guest explains the paper\, section b
y section\, in greater\ndetail than may be explained within the text of th
e article. To aid\nwith discussion\, only the article PDF is presented --
no\npowerpoint-style slides. Galread discussions are very friendly and\nin
teractive.\n
DTSTART:20210201T160000Z
DTEND:20210201T170000Z
LAST-MODIFIED:20210129T141211Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-1
END:VEVENT
BEGIN:VEVENT
UID:3cabd90e-0250-4f7a-b6eb-801b29e93a70
DTSTAMP:20210308T215705Z
CREATED:20201102T131735Z
DESCRIPTION:Topic: Graph Density Inequalities\, Sums of Squares and Tropica
lization\n\nSpeakers: Annie Raymond\n\nAffiliation: University of Massachu
setts Amherst\n\nEstablishing inequalities among graph densities is a cent
ral pursuit\nin extremal graph theory. One way to certify the nonnegativit
y of a\ngraph density expression is to write it as a sum of squares or as
a\nrational sum of squares. In this talk\, we will explore how one does so
\nand we will then identify simple conditions under which a graph\ndensity
expression cannot be a sum of squares or a rational sum of\nsquares. Trop
icalization will play a key role for the latter.\n\nThis is joint work wit
h Greg Blekherman\, Mohit Singh\, and Rekha\nThomas.\n
DTSTART:20210201T161500Z
DTEND:20210201T171500Z
LAST-MODIFIED:20210201T143745Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-472
END:VEVENT
BEGIN:VEVENT
UID:43475a55-9f1a-4485-aa4d-dc195c274ee1
DTSTAMP:20210308T215705Z
CREATED:20210114T151852Z
DESCRIPTION:Topic: Metastable Helium Absorptions with 3D Hydrodynamics and
Self-Consistent Photochemistry\n\nSpeakers: Lile Wang\, Fei Dai\n\nAffilia
tion: CCA --> Tsinghua University\; Caltech\n\nThe metastable Helium (He*)
lines near 10830 A are ideal probes of\natmospheric erosion--a common phe
nomenon of close-in exoplanet\nevolution. A handful of exoplanet observati
ons yielded well-resolved\nHe* absorption features in transits\, yet they
were mostly analyzed\nwith 1D isothermal models prescribing mass-loss rate
s. In this talk\,\nwe will present our recent works that examine the He* t
ransmission\nlines by 3D hydrodynamics\, co-evolved with ray-tracing radia
tive\ntransfer and non-equilibrium thermochemsitry. Starting from the\nobs
erved stellar/planetary properties with reasonable assumptions\nabout the
host's high energy irradiation\, we predict from first\nprinciple the outf
low kinematics and planet transmission spectra\,\nwhich are quantitatively
consistent with observations. We will also\ndiscuss the microscopic facto
rs and dynamic processes that may affect\nthe appearance of He* lines\, es
pecially the high-energy irradiation\nand the stellar winds coming from th
e host star.\n
DTSTART:20210201T171500Z
DTEND:20210201T181500Z
LAST-MODIFIED:20210205T142252Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-19
END:VEVENT
BEGIN:VEVENT
UID:0de39f0d-d28b-4ed4-abba-593a0c417c2b
DTSTAMP:20210308T215705Z
CREATED:20210114T145658Z
DESCRIPTION:Topic: KSZ velocity reconstruction: Properties from N-body simu
lations and the halo model\n\nSpeakers: Utkarsh Giri\n\nAffiliation: Perim
eter Institute\n\nKSZ velocity reconstruction is a recently proposed metho
d for mapping\nthe largest-scale modes of the universe\, by applying a qua
dratic\nestimator v̂ to the small-scale CMB and a galaxy catalog. We\nimpl
ement kSZ velocity reconstruction in an N-body simulation pipeline\nand ex
plore its properties. We find that the reconstruction noise can\nbe larger
than the analytic prediction which is usually assumed. We\nrevisit the an
alytic prediction and find additional noise terms that\nexplain the discre
pancy. The new terms are obtained from a six-point\nhalo model calculation
and are analogous to the N(1) and N(3/2) biases\nin CMB lensing. We imple
ment an MCMC pipeline that estimates fNL from\nN-body kSZ simulations and
show that it recovers unbiased estimates of\nfNL\, with statistical errors
consistent with a Fisher matrix forecast.\nOverall\, these results confir
m that kSZ velocity reconstruction will\nbe a powerful probe of cosmology
in the near future\, but new terms\nshould be included in the noise power
spectrum.\n
DTSTART:20210201T173000Z
DTEND:20210201T190000Z
LAST-MODIFIED:20210129T142116Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-0
END:VEVENT
BEGIN:VEVENT
UID:36690955-3d13-4e5f-9d60-9dc3fe64ce8b
DTSTAMP:20210308T215705Z
CREATED:20201209T231555Z
DESCRIPTION:Topic: no seminar: snow\n\n
DTSTART:20210201T190000Z
DTEND:20210201T200000Z
LAST-MODIFIED:20210201T153036Z
LOCATION:
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-351
END:VEVENT
BEGIN:VEVENT
UID:752485d5-592f-4157-bd10-757e499ad7ed
DTSTAMP:20210308T215705Z
CREATED:20210105T211902Z
DESCRIPTION:Topic: Index theorems for nodal count and a lateral variation p
rinciple\n\nSpeakers: Gregory Berkolaiko\n\nAffiliation: Texas A&M Univers
ity\n\nOur study is motivated by earlier results about nodal count of\nLap
lacian eigenfunctions on manifolds and graphs that share the same\nflavor:
a normalized nodal count is equal to the Morse index of a\ncertain energy
functional at the critical point given by the\neigenfunction in question
(the precise meaning of the 'normalized\ncount' and the 'energy functional
' depends on the setting of the\nproblem). In the hindsight\, in all these
results\, the nodal count can\nbe understood as the spectral shift obtain
ed by perturbing the\noperator in an appropriate way. This brings us to th
e following\ngeneral result: the spectral shift can be recovered as the st
ability\nindex of the eigenvalue with respect to small 'lateral' variation
s of\nthe perturbation. Based on joint work with Y. Canzani\, G. Cox\, P.
\nKuchment and J. Marzuola\, as well as earlier work with R. Band\, Y.\nCo
lin de Verdiere\, H. Raz\, U. Smilansky and T. Weyand.\n
DTSTART:20210201T213000Z
DTEND:20210201T223000Z
LAST-MODIFIED:20210201T144822Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-134
END:VEVENT
BEGIN:VEVENT
UID:2fc98318-1dad-4368-855a-dede47cb2a27
DTSTAMP:20210308T215705Z
CREATED:20201105T141632Z
DESCRIPTION:Topic: Log-concave polynomials in theory and applications - Par
t 2\n\nSpeakers: Cynthia Vinzant\n\nAffiliation: Member\, School of Mathem
atics\n\nA polynomial with nonnegative coefficients is strongly log-concav
e if\nit and all of its derivatives are log-concave as functions on the\np
ositive orthant. This rich class of polynomials includes many\ninteresting
examples\, such as homogeneous real stable polynomials and\nmixed volume
polynomials of convex bodies. Its structure is intimately\nrelated to comb
inatorial objects called matroids and generalized\npermutahedra. This theo
ry gives powerful tools for showing discrete\nlog-concavity of finite sequ
ences. Distributions coming from the\ncoefficients of such polynomials can
also be approximately sampled. In\nthis talk I will go over the structura
l properties of this rich class\nof real polynomials and discuss applicati
ons in combinatorics and\ncomputer science.\n\nThis talk is based on joint
work with Nima Anari\, Kuikui Liu and\nShayan Oveis Gharan.\n
DTSTART:20210202T153000Z
DTEND:20210202T173000Z
LAST-MODIFIED:20210202T210509Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-467
END:VEVENT
BEGIN:VEVENT
UID:5ea11a46-5c31-4f0a-88b6-8e0f0ebc6c74
DTSTAMP:20210308T215705Z
CREATED:20201223T135316Z
DESCRIPTION:
DTSTART:20210202T173000Z
DTEND:20210202T183000Z
LAST-MODIFIED:20201223T135453Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch
END:VEVENT
BEGIN:VEVENT
UID:ea45d00a-9aed-4d8a-ad09-b870f3fa38a0
DTSTAMP:20210308T215705Z
CREATED:20210105T221607Z
DESCRIPTION:Topic: ∞-topoi\n\nSpeakers: Ian Coley\n\nAffiliation: Rutgers U
niversity\n\n
DTSTART:20210202T183000Z
DTEND:20210202T203000Z
LAST-MODIFIED:20210202T021559Z
LOCATION:Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-13
END:VEVENT
BEGIN:VEVENT
UID:89d12dd1-5959-4a86-bc05-e885309819b9
DTSTAMP:20210308T215705Z
CREATED:20210106T221933Z
DESCRIPTION:Topic: User's guide to computing with tilting modules\n\nSpeake
rs: Benjamin Elias\n\nAffiliation: University of Oregon\; von Neumann Fell
ow\, School of Mathematics\n\nA basic technique in algebra\, when describi
ng a difficult-to-approach\ncategory like Tilt\, is to choose a projective
generator and study its\nendomorphism ring. The modern twist on this tech
nique is to choose the\nprojective generator with great naivety: rather th
an attempting the\ndifficult task of studying the minimal projective gener
ator\, one\nstudies a combinatorial and highly redundant projective genera
tor. For\nexample\, indecomposable tilting modules over an algebraic group
can be\nhard to access\, but iterated tensor products of fundamental\nrep
resentations (which form a subcategory Fund) are fairly\nstraightforward.
Morphisms in Fund can be described by generators and\nrelations using so-c
alled web algebras (in some types). Since every\nindecomposable tilting mo
dule is a direct summand of an object of\nFund\, one can recover the categ
ory of tilting modules by taking the\nKaroubi envelope of the web category
\, which formally adds all images\nof idempotents as new objects.This appr
oach makes the study of tilting\nmodules tractable\, by separating the com
plexity of tilting modules\nfrom the process of finding a presentation\, a
nd instead putting this\ncomplexity in the formal process of taking the Ka
roubi envelope (i.e.\nfinding idempotents). Thankfully\, most of the numer
ical behavior of\ntilting modules can be computed within Fund\, using basi
c techniques\nlike the cellular filtration and the local intersection pair
ing. The\npurpose of this talk is to introduce web algebras\, local inters
ection\npairings\, and techniques of idempotent computation. These computa
tions\nare what helped me most to internalize why tilting modules exhibit
\nfractal\, generational behavior. Since most of the techniques are basic
\nalgebra\, it should be accessible to all\, and I expect the discussion\n
to be either yawningly familiar or fairly novel depending on the\naudience
member. With the Riche-Williamson theorem in place\, there is\na more eff
icient way to compute multiplicities in the trivial block\nTilt$_0$ than c
omputing within Tilt itself: one computes instead with\nthe antispherical
module $M$ over the affine Hecke category. Though\nthe setting is differen
t ($M$ rather than Tilt) the techniques are the\nsame. One finds a combina
torial subcategory (iterated wall-bouncing\nfunctors applied to the trivia
l representation)\, describes it by\ngenerators and relations (Soergel dia
grammatics)\, and uses local\nintersection pairings to compute idempotents
and multiplicities. Time\npermitting\, I will begin to describe this sett
ing.\n
DTSTART:20210202T200000Z
DTEND:20210202T220000Z
LAST-MODIFIED:20210201T215555Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-11
END:VEVENT
BEGIN:VEVENT
UID:dae418f6-9e58-486c-b435-9a67465ab988
DTSTAMP:20210308T215705Z
CREATED:20210105T233030Z
DESCRIPTION:Topic: Permutation stability of Grigorchuk groups\n\nSpeakers:
Tianyi Zheng\n\nAffiliation: University of California\, San Diego\n\nA rec
ent result of Becker\, Lubotzky and Thom characterizes\, for\namenable gro
ups\, permutation stability in terms of co-soficity of\ninvariant random s
ubgroups (IRS). We will explain that for a class of\namenable groups actin
g on rooted trees\, including the Grigorchuk\ngroup\, the IRS co-soficity
condition is verified. One key ingredient\nin the proof is the so called “
double commutator” lemma for IRS\,\nwhich is an analogue of the classical
lemma known for normal\nsubgroups. All notions will be defined and explain
ed.
DTSTART:20210203T160000Z
DTEND:20210203T171500Z
LAST-MODIFIED:20210203T141152Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-12
END:VEVENT
BEGIN:VEVENT
UID:1790f2ad-00ed-446e-bd20-4da04416fa99
DTSTAMP:20210308T215705Z
CREATED:20210115T145526Z
DESCRIPTION:Topic: Probing Feedback from Super Star Clusters in the Central
Starburst of NGC253\n\nSpeakers: Rebecca Levy\n\nAffiliation: University
of Maryland\n\nYoung massive clusters play an important role in the evolut
ion of\ntheir host galaxies. A significant fraction of stars in starbursts
are\nbelieved to form in a massive cluster environment\, and feedback fro
m\nthe high-mass stars in these clusters can have profound effects on the
\nsurrounding interstellar medium. Characterizing the immediate\nenvironme
nt of these clusters is difficult because resolving these\ncompact (r~1 pc
) structures in external galaxies requires very high\nangular and spectral
resolution observations. The nuclear starburst in\nthe nearby galaxy NGC2
53 at a distance of 3.5 Mpc is a key laboratory\nin which to study star fo
rmation in an extreme environment. We present\nALMA data at 350 GHz with 2
8 milliarcsecond (0.5 pc) resolution. We\ndetect blue-shifted absorption a
nd red-shifted emission (P-Cygni\nprofiles) towards three of these SSCs in
multiple lines\, which\nrepresents direct evidence for previously unobser
ved outflows likely\ncaused by the gas-clearing phase of the growth of the
se clusters. The\nmass contained in these outflows is a significant fracti
on of the\ncluster gas masses\, which suggests we are witnessing a short b
ut\nimportant phase that limits the final masses of these objects. We\nmod
el the P-Cygni line profiles to constrain the outflow opening\nangles and
inclinations\, finding that the outflows must be nearly\nspherical. Throug
h a comparison of the outflow properties with\npredictions from simulation
s and analytic models\, we find that none of\nthe available mechanisms com
pletely explains the observations\,\nalthough the ones that come closest a
re dust-reprocessed radiation\npressure and O star stellar winds or possib
ly a combination of both.\nAt the current mass outflow rates\, the observe
d outflows will have a\nvery substantial effect on the clusters' evolution
and star formation\nefficiency.\n
DTSTART:20210203T160000Z
DTEND:20210203T170000Z
LAST-MODIFIED:20210129T174313Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Star Formation/ISM Rendezvous (SFIR)
URL:https://www.ias.edu/sns/events/princeton-university-star-formationism-r
endezvous-sfir-0
END:VEVENT
BEGIN:VEVENT
UID:8a6bf891-a3f3-4a72-b346-1d90fd332f31
DTSTAMP:20210308T215705Z
CREATED:20200921T191517Z
DESCRIPTION:Topic: The History of the Arabic Book: A New Chapter\n\nIt is a
n exciting time to be thinking about Arabic book history\, as\nmany questi
ons are now being re-framed and addressed in ways that\nspeak to a wider f
ield of scholarly investigation. These questions\nconcern\, for example\,
the arguably scant material evidence for books\nup until roughly the eleve
nth century C.E.\, the non-survival of books\ntreating important topics\,
the great variability of witnesses to\nindividual works\, and the ways tha
t recycling of parts of prior books\noperated across time and place. Such
questions\, which query the very\nnature of ‘the book’\, are relevant for
the first four Islamic\ncenturies\, but also for later periods. This joint
ly delivered lecture\nwill present the KITAB project – a collaboration bet
ween historians\nand computer scientists that addresses these major questi
ons. We have\nassembled a corpus of 1.7 billion words of Arabic texts\, an
d are\nseeking specifically to understand transmission practices (ca.\n700
-1500)\, with a special focus on how authors recycled earlier works\nand h
ow they cited their predecessors. Through this lecture\, we hope\nto descr
ibe the frontiers of knowledge\, the challenges and promises of\nour data\
, and what listeners themselves might now do with it. \n\nSpeakers:\nMathe
w Barber (The Aga Khan University\, KITAB)\nLORENZ NIGST (The Aga Khan Uni
versity\, KITAB)\nSARAH BOWEN SAVANT (The Aga Khan University-ISMC)\nPETER
VERKINDEREN (The Aga Khan University\, KITAB)\n\n(KITAB is a European Res
earch Council Consolidator Grant project\nfunded under Horizon 2020 and al
so has received funding from the\nAndrew W. Mellon Foundation.)\n\nRegiste
r in advance for this webinar here\n[https://theias.zoom.us/webinar/regist
er/WN_RSCOK4wzTG2jtkvcwn3LNQ].\nAfter registering\, you will receive a con
firmation email containing\ninformation about joining the webinar.\n
DTSTART:20210203T170000Z
DTEND:20210203T170000Z
LAST-MODIFIED:20210202T194935Z
LOCATION:Webinar
SUMMARY:Near Eastern Studies and Digital Scholarship @IAS Joint Lecture
URL:https://www.ias.edu/events/near-eastern-studies-lecture-0
END:VEVENT
BEGIN:VEVENT
UID:780ee270-b910-4cde-a4d3-ac1bfd142435
DTSTAMP:20210308T215705Z
CREATED:20210106T002906Z
DESCRIPTION:Topic: The K-ring of Steinberg varieties\n\nSpeakers: Pablo Boi
xeda Alvarez\n\nAffiliation: Member\, School of Mathematics\n\nIn the upco
ming series of talks we discuss some equivalences by\nBezrukavnikov betwee
n categories of coherent sheaves on Steinberg\nvarieties and of perverse s
heaves on the affine flag variety. In this\ntalk I discuss the decategorif
ied isomorphism preceeding\nBezrukavnikov’s equivalence of categories. Thi
s is a ring\nisomorphism of the $K$-ring of the Steinberg variety under co
nvolution\nand the affine Hecke algebra originally due to Kazhdan\, Luszti
g and\nGinzburg.\n
DTSTART:20210203T200000Z
DTEND:20210203T220000Z
LAST-MODIFIED:20210203T141758Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-16
END:VEVENT
BEGIN:VEVENT
UID:e04943be-f790-4dad-bfea-a74cb80d90cd
DTSTAMP:20210308T215705Z
CREATED:20210106T004725Z
DESCRIPTION:Topic: How hard is it to tell two knots apart?\n\nSpeakers: Ana
stasiia Tsvietkova\n\nAffiliation: Rutgers University\; von Neumann Fellow
\, School of Mathematics\n\nMany problems in classical topology can be for
mulated as decision\nproblems\, with yes/no answer and an algorithm as a s
olution. While\nsuch problems often appear to be intuitively hard\, we sti
ll know\nlittle about lower bounds on their algorithmic complexity. For\ne
xample\, distinguishing knots started as a knot tabulation effort in\nVict
orian England\, and is still ongoing. A number of intricate\nalgorithms no
w exist. While this makes the problem decidable\, none of\nthe algorithms
are polynomial\, and there are no known lower bounds on\nthe complexity of
this problem. We will review recent advances\nconcerning complexity of re
lated problems: recognizing an unknot\,\ndetecting various sublinks\, gett
ing from one link diagram to another\nby Reidemesiter moves\, and homeomor
phism of 3-manifolds. Aside from\nlong term interest of topologists in the
se problems\, they provide new\nexamples of problems that are NP-hard\, NP
-complete\, or lie in the\nintersection of NP and co-NP classes\, but do n
ot have a known\npolynomial algorithm.\n
DTSTART:20210203T223000Z
DTEND:20210204T000000Z
LAST-MODIFIED:20210201T161230Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-198
END:VEVENT
BEGIN:VEVENT
UID:d24acf9c-da21-49ce-b57f-cb6a6ed891c8
DTSTAMP:20210308T215705Z
CREATED:20201210T013023Z
DESCRIPTION:
DTSTART:20210204T150000Z
DTEND:20210204T170000Z
LAST-MODIFIED:20210106T041631Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-15
END:VEVENT
BEGIN:VEVENT
UID:e312c275-3d24-4af6-94eb-766c7cdb1952
DTSTAMP:20210308T215705Z
CREATED:20210113T163325Z
DESCRIPTION:Topic: Constraining the Neutron Star Equation of State with Gra
vitational Wave Events\n\nSpeakers: Carolyn Raithel\n\nAffiliation: The In
stitute for Advanced Study\n\nBinary neutron star mergers provide a unique
probe of the neutron star\nequation of state (EOS) across a wide range of
parameter space\, from\nthe zero-temperature EOS during the inspiral to t
he finite-temperature\nEOS following the merger. In this talk\, I will sta
rt with an overview\nof what we have learned about the cold EOS from the f
irst binary\nneutron star mergers\, focusing in particular on the tidal\nd
eformability constraints from event GW170817\, what these constraints\nimp
ly for the neutron star radius\, and how such constraints compare to\nprev
ious X-ray measurements. In the second part of my talk\, I will\ndiscuss w
hat additional EOS information can be extracted by studying\nthe late-stag
es of a binary neutron star merger\, during which time the\nmatter is heat
ed to significant temperatures. I will present a new set\nof binary neutro
n star merger simulations\, which use a parametrized\nframework for calcul
ating the finite-temperature EOS. This new EOS\nframework is based on a tw
o-parameter approximation of the particle\neffective mass and includes the
leading-order effects of degeneracy in\nthe finite-temperature part of th
e EOS\, providing a significant\nimprovement over the ideal-fluid based ap
proximations that are\ncommonly used in simulations today. I will show tha
t including the\neffects of degeneracy can significantly affect the post-m
erger\ngravitational wave signal and the amount of ejected merger\, compar
ed\nto the canonical approach.\n
DTSTART:20210204T160000Z
DTEND:20210204T170000Z
LAST-MODIFIED:20210201T152522Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-1
END:VEVENT
BEGIN:VEVENT
UID:01340a39-aacd-4627-9163-7b44ca730d27
DTSTAMP:20210308T215705Z
CREATED:20210107T004841Z
DESCRIPTION:Topic: Center of quantum group\n\nSpeakers: Arun Kannan\n\nAffi
liation: Massachusetts Institute of Technology\n\nThe talk covers Chapter
6 in Jantzen's book.\n
DTSTART:20210204T210000Z
DTEND:20210204T230000Z
LAST-MODIFIED:20210205T011622Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-1
END:VEVENT
BEGIN:VEVENT
UID:5bbc8a12-a710-4a6d-8139-a9697045c7ae
DTSTAMP:20210308T215705Z
CREATED:20210106T010723Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210204T213000Z
DTEND:20210204T223000Z
LAST-MODIFIED:20210204T172402Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-437
END:VEVENT
BEGIN:VEVENT
UID:05348365-6730-488b-ac57-ca5aba252011
DTSTAMP:20210308T215705Z
CREATED:20210106T021826Z
DESCRIPTION:Topic: Algebraic torus actions on Fukaya categories and tamenes
s of change in Floer homology under symplectic isotopies\n\nSpeakers: Yusu
f Barış Kartal\n\nAffiliation: Princeton University\n\nThe purpose of this
talk is to explore how Lagrangian Floer homology\ngroups change under (no
n-Hamiltonian) symplectic isotopies on a\n(negatively) monotone symplectic
manifold $(M\,\omega)$ satisfying a\nstrong non-degeneracy condition. Mor
e precisely\, given two Lagrangian\nbranes $L\,L'$\, consider family of Fl
oer homology groups\n$HF(\phi_v(L)\,L')$\, where $v\in H^1(M\,\mathbb R)$
and $\phi_v$ is the\ntime-1 map of a symplectic isotopy with flux $v$. We
show how to fit\nthis collection into an algebraic sheaf over the algebrai
c torus\n$H^1(M\,\mathbb G_m)$. The main tool is the construction of an\n'
algebraic action' of $H^1(M\,\mathbb G_m)$ on the Fukaya category. As\nan
application\, we deduce the change in Floer homology groups satisfy\nvario
us tameness properties\, for instance\, the dimension is constant\noutside
an algebraic subset of $H^1(M\,\mathbb G_m)$. Similarly\, given\nclosed $
1$-form $\alpha$\, which generates a symplectic isotopy denoted\nby $\phi_
\alpha^t$\, the Floer homology groups\n$HF(\phi_\alpha^t(L)\,L')$ have ran
k that is constant in $t$\, with\nfinitely many possible exceptions.\n
DTSTART:20210205T141500Z
DTEND:20210205T154500Z
LAST-MODIFIED:20210205T205623Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-57
END:VEVENT
BEGIN:VEVENT
UID:acacd814-1818-4a57-bf3b-473db5fae086
DTSTAMP:20210308T215705Z
CREATED:20210115T162328Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210205T200000Z
DTEND:20210205T210000Z
LAST-MODIFIED:20210201T192505Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-3
END:VEVENT
BEGIN:VEVENT
UID:ef5fb345-9d72-47a7-8673-1ea54e1c39db
DTSTAMP:20210308T215705Z
CREATED:20210114T141430Z
DESCRIPTION:Topic: CANDELS Meets GSWLC: Evolution of the Relationship Betwe
en Morphology and Star Formation Since z = 2TBA\n\nSpeakers: Chandler Osbo
urne\n\nAffiliation: Indiana University Bloomington\n\nEach week\, we hold
a relatively informal seminar/discussion series\nwith an emphasis on extr
a-galactic and large-scale structure\nastrophysics.\n\nDuring Galread a le
ader/visitor presents a recent paper to the\ndiscussion group. The PDF of
the paper is projected onto a large\nscreen\, and a guest explains the pap
er\, section by section\, in greater\ndetail than may be explained within
the text of the article. To aid\nwith discussion\, only the article PDF is
presented -- no\npowerpoint-style slides. Galread discussions are very fr
iendly and\ninteractive.\n
DTSTART:20210208T160000Z
DTEND:20210208T170000Z
LAST-MODIFIED:20210205T140629Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-4
END:VEVENT
BEGIN:VEVENT
UID:dfe5a4ef-f318-4847-9424-50c6367df76d
DTSTAMP:20210308T215705Z
CREATED:20201102T134103Z
DESCRIPTION:Topic: Total Functions in the Polynomial Hierarchy\n\nSpeakers:
Robert Kleinberg\n\nAffiliation: Cornell University\n\nNon-constructive e
xistence proofs\, which establish the existence of\nobjects without furnis
hing an efficient algorithm to produce examples\,\nabound in mathematics.
How hard is it\, computationally\, to find\nobjects whose existence is gua
ranteed non-constructively? Since the\n1980's complexity theorists have be
en classifying these search\nproblems into broad classes of computationall
y equivalent problems\,\neach corresponding to a different non-constructiv
e proof principle\,\nsuch as the pigeonhole principle\, the local search p
rinciple (that any\nfunction on a finite graph has a local minimum)\, and
the parity\nprinciple (that a finite set of odd cardinality cannot be empt
y). All\nof these problems are contained in the complexity class TFNP\,\nc
onsisting of search problems for which a solution is guaranteed to\nexist
and the validity of a solution can be efficiently verified. \n\nOne of the
most successful non-constructive methods for proving\nexistence of combin
atorial objects\, the probabilistic method\, does not\nseem to be captured
by TFNP because the applications of the\nprobabilistic method often yield
existence of objects whose properties\nare hard to verify computationally
. For example\, Erdos famously used\nthe probabilistic method to prove the
existence of 'Ramsey graphs'\nhaving no large cliques or independent sets
\; however\, it is hard to\nverify that a given graph is a Ramsey graph. T
his motivates exploring\nthe complexity of search problems for which exist
ence of solutions is\nstill guaranteed but efficient verification of solut
ions is no longer\npossible. Many such problems can be organized into a hi
erarchy\ndepending on the number of alternating quantifiers in the logical
\nformula that solutions must satisfy. At the second level of the\nhierarc
hy we encounter a class that seems especially rich in such\nproblems: PEPP
(for “polynomial empty pigeonhole principle”)\,\nwhich includes problems
related to probabilistic-method proofs based\non the union bound. Examples
include finding a bit string that is far\nfrom all codewords\, finding an
explicit rigid matrix\, as well as a\nproblem we call Complexity\, captur
ing Complexity Theory’s quest to\nfind functions that cannot be computed b
y small circuits. When the\nunion bound is generous\, in that solutions co
nstitute at least a\npolynomial fraction of the domain\, we have a family
of seemingly\nweaker classes α-PEPP. Higher in the hierarchy\, we identify
the\nconstructive version of the Sauer-Shelah lemma and the appropriate\n
generalization of PPP that contains it\, as well as the problem of\nfindin
g a king in a tournament (a vertex k such that all other\nvertices are def
eated by k\, or by somebody k defeated).\n\nJoint work with Oliver Korten\
, Dan Mitropolsky\, and Christos\nPapadimitriou.\n
DTSTART:20210208T161500Z
DTEND:20210208T171500Z
LAST-MODIFIED:20210208T151550Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-473
END:VEVENT
BEGIN:VEVENT
UID:95268bbf-dfe9-4173-a124-f4552c9a95f4
DTSTAMP:20210308T215705Z
CREATED:20210114T151957Z
DESCRIPTION:Topic: No Talk\n\nTo avoid a conflict with David Spergel's talk
\, there will be no\nexoplanet discussion group meeting on Monday. We'll
resume on the\n15th.\n
DTSTART:20210208T171500Z
DTEND:20210208T181500Z
LAST-MODIFIED:20210208T092707Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-11
END:VEVENT
BEGIN:VEVENT
UID:b306ad67-e3c4-466a-9497-2bcbff0d7cd1
DTSTAMP:20210308T215705Z
CREATED:20210114T145910Z
DESCRIPTION:Topic: What is the Price of Abandoning Dark Matter? Cosmologica
l Constraints on Alternative Gravity Theories\n\nSpeakers: David Spergel\n
\nAffiliation: Princeton University\n\nAny successful alternative gravity
theory that obviates the need for\ndark matter must fit our cosmological o
bservations. Measurements of\nmicrowave background polarization trace the
large-scale baryon\nvelocity field at recombination and show very strong O
(1 ) baryon\nacoustic oscillations and anti-correlations between temperat
ure and\npolarization on large angular scales. This constraint rules out m
ost\nmodified gravity theories and the modified theories that attempt to\n
fit the data are far more complex and have more parameters than cold\ndark
matter models. Observations of weak lensing of the cosmic\nmicrowave bac
kground are well fit by lambda-CDM and deviate from\npredictions of MOND-l
ike theories. Measurements of the kSZ effect\nshows a correlation between
galaxies and large-scale flows consistent\nwith gravity falling as 1/r^2
rather than following a MOND-like law on\nlarge-scales.\n
DTSTART:20210208T173000Z
DTEND:20210208T190000Z
LAST-MODIFIED:20210205T175640Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-1
END:VEVENT
BEGIN:VEVENT
UID:4b8145d2-d665-4427-b2d0-44f415520d39
DTSTAMP:20210308T215705Z
CREATED:20201209T231610Z
DESCRIPTION:Topic: The top-heavy conjecture for vectors and matroids\n\nSpe
akers: Tom Braden\n\nAffiliation: University of Massachusetts\, Amherst\;
Member\, School of Mathematics\n\nA 1948 theorem of de Bruijn and Erdős sa
ys that if $n$ points in a\nprojective plane do not lie all on a line\, th
en they determine at\nleast n lines. More generally\, Dowling and Wilson c
onjectured in 1974\nthat for any finite set of vectors spanning a $d$-dime
nsional vector\nspace\, the number of $k$-dimensional spaces that they spa
n is at most\nthe number of $(d-k)$-dimensional spaces they span\, for all
$k$\nsmaller than $d/2$. In fact\, Dowling and Wilson conjectured this mo
re\ngenerally for matroids\, a combinatorial abstraction of incidence\ngeo
metries which do not have to arise from actual vector\nconfigurations. The
conjecture for vector configurations was proved in\n2017 by Huh and Wang\
, using the hard Lefschetz Theorem for\nintersection cohomology applied to
a singular algebraic variety\nassociated to the vector configuration. I w
ill discuss their proof\,\nand also more recent joint work with Huh\, Math
erne\, Proudfoot and Wang\nwhich proves the conjecture for all matroids\,
by constructing a\ncombinatorial replacement for intersection cohomology w
hich makes\nsense even for matroids which do not arise from a vector\nconf
iguration.\n
DTSTART:20210208T190000Z
DTEND:20210208T200000Z
LAST-MODIFIED:20210208T151854Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-352
END:VEVENT
BEGIN:VEVENT
UID:2f9ff8d9-f6ba-4d07-80bb-e9c513b7c4c0
DTSTAMP:20210308T215705Z
CREATED:20210105T211919Z
DESCRIPTION:Topic: Planarity in Higher Codimension Mean Curvature Flow\n\nS
peakers: Keaton Naff\n\nAffiliation: Columbia University\n\nWe will discus
s the mean curvature flow of $n$-dimensional\nsubmanifolds in $\mathbb{R}^
{n+k}$ satisfying a pinching condition\n$|A|^2 < c|H|^2$ introduced by And
rews and Baker (2010). For suitable\nconstants $c$\, these flows resemble
flows of convex hypersurfaces and\ntwo-convex hypersurfaces\, studied in H
uisken (1984) and\nHuisken-Sinestrari (2009). After observing that singula
rity formation\nalways appears to be codimension one\, we will discuss a q
uantitative\nestimate for this behavior. Then we will discuss several appl
ications.\n
DTSTART:20210208T213000Z
DTEND:20210208T223000Z
LAST-MODIFIED:20210208T152146Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-135
END:VEVENT
BEGIN:VEVENT
UID:9d0df42c-ddb0-425b-8057-5b08c816ffac
DTSTAMP:20210308T215705Z
CREATED:20201105T141703Z
DESCRIPTION:Topic: High dimensional expanders\n\nSpeakers: Shai Evra\n\nAff
iliation: Princeton University\n\nExpander graphs are graphs which simulta
neously are both sparse and\nhighly connected. The theory of expander grap
hs received a lot of\nattention in the past half a century\, from both com
puter science and\nmathematics. In recent years\, a new theory of high dim
ensional\nexpanders have emerged. In his seminal work\, Gromov raised the
\nfollowing main question: Do (bounded degree) high dimensional\nexpanders
exist? A culmination of several works by experts in the\nfield resulted
in a positive answer to Gromov's question (according to\nhis definition).
\n\nIn this talk\, I will give a quick introduction to the theory of high
\ndimensional expanders\, describe the challenges this theory\noffers\, an
d explain the known techniques to construct such (bounded\ndegree) high di
mensional expanders. \n\nThis talk is based on a joint work with Tali Kauf
man.\n
DTSTART:20210209T153000Z
DTEND:20210209T173000Z
LAST-MODIFIED:20210209T132833Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-468
END:VEVENT
BEGIN:VEVENT
UID:35c4fa0a-092c-4737-a919-50fcdf8b57b1
DTSTAMP:20210308T215705Z
CREATED:20210201T192728Z
DESCRIPTION:
DTSTART:20210209T173000Z
DTEND:20210209T183000Z
LAST-MODIFIED:20210201T192757Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-0
END:VEVENT
BEGIN:VEVENT
UID:511f5b25-5fb6-45ff-864f-c4685a698aa2
DTSTAMP:20210308T215705Z
CREATED:20210105T221623Z
DESCRIPTION:Topic: Overview and homotopy theory of stratified spaces\n\nSpe
akers: Remy van Dobben de Bruyn\n\nAffiliation: Institute for Advanced Stu
dy and Princeton University\; Veblen Research Instructor\, School of Mathe
matics\n\n
DTSTART:20210209T183000Z
DTEND:20210209T203000Z
LAST-MODIFIED:20210209T152647Z
LOCATION:Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-14
END:VEVENT
BEGIN:VEVENT
UID:e104ac71-61c0-4242-8b05-df78998c0ba8
DTSTAMP:20210308T215705Z
CREATED:20210106T221949Z
DESCRIPTION:Topic: Tilting character computations\n\nSpeakers: Geordie Will
iamson\n\nAffiliation: University of Sydney\; Distinguished Visiting Profe
ssor\, School of Mathematics\n\nLast week\, Ben explained how diagrammatic
algebra helps understand\ntilting characters. In Ben's talk the diagramma
tic algebra was that of\nTemperley-Lieb flavour and its higher rank cousin
s (webs etc.) I will\nbriefly recall the diagrammatics for the Hecke categ
ory ('Soergel\ncalculus') and then explain why it gives a much more effici
ent means\nof calculating tilting characters. Then I will try to explain h
ow one\ncan implement this on computer. This allows us to compute many mor
e\ntilting characters than were previously known. This discussion will be
\nreasonably high level. Thorge will go into more detail next week.\n
DTSTART:20210209T200000Z
DTEND:20210209T220000Z
LAST-MODIFIED:20210208T151932Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-12
END:VEVENT
BEGIN:VEVENT
UID:f0f4cb72-953d-4603-a777-3b73854cb406
DTSTAMP:20210308T215705Z
CREATED:20210114T162758Z
DESCRIPTION:Topic: Detecting and Characterizing Exoplanets\n\nSpeakers: Guö
mundur Kári Stefánsson\n\nAffiliation: Princeton University\n\n \n\nDr. St
efánsson is the Henry Norris Russell Fellow in Princeton’s\nDepartment of
Astrophysical Sciences. He will speak on innovative\ntechniques he has hel
ped develop for Detecting and Characterizing\nExoplanets.\n
DTSTART:20210210T003000Z
DTEND:20210210T023000Z
LAST-MODIFIED:20210114T163036Z
LOCATION:Virtual Meeting
SUMMARY:Amateur Astronomers Association of Princeton (AAAP) Monthly Meeting
URL:https://www.ias.edu/sns/events/amateur-astronomers-association-princeto
n-aaap-monthly-meeting-2
END:VEVENT
BEGIN:VEVENT
UID:8cbedeeb-36ea-49e2-9b81-741fdbf957f7
DTSTAMP:20210308T215705Z
CREATED:20210115T152514Z
DESCRIPTION:Topic: How winds and radiation shape star formation\n\nSpeakers
: Sam Green\n\nAffiliation: University of Amsterdam\n\nFeedback from massi
ve stars has a dramatic influence on everything\nfrom protostars to cosmic
voids. In this talk I focus on how they\nshape star-forming clouds\, in p
articular the interaction between\nradiation and winds. I will discuss the
role of simulations and\nanalytic theory in understanding observations of
Galactic and\nextragalactic HII regions\, and challenges in building a mu
ltiscale\npicture of how stars shape the universe.\n
DTSTART:20210210T160000Z
DTEND:20210210T170000Z
LAST-MODIFIED:20210205T143628Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Star Formation/ISM Rendezvous (SFIR)
URL:https://www.ias.edu/sns/events/princeton-university-star-formationism-r
endezvous-sfir-1
END:VEVENT
BEGIN:VEVENT
UID:241c1f04-debf-4c75-9d64-5c527de3f1b2
DTSTAMP:20210308T215705Z
CREATED:20210105T233045Z
DESCRIPTION:Topic: Non-amenable groups admitting no sofic approximation by
expander graphs\n\nSpeakers: Gabor Kun\n\nAffiliation: Alfréd Rényi Instit
ute of Mathematics\n\nWe show that the direct product of an infinite\, fin
itely generated\nKazhdan Property (T) group and a finitely presented\, not
residually\nfinite amenable group admits no sofic approximation by expand
er\ngraphs. Joint work with Andreas Thom.
DTSTART:20210210T160000Z
DTEND:20210210T171500Z
LAST-MODIFIED:20210210T134529Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-13
END:VEVENT
BEGIN:VEVENT
UID:a6f6ffae-5bee-4db1-a92d-26c5d1dc6a4c
DTSTAMP:20210308T215705Z
CREATED:20200922T210340Z
DESCRIPTION:Topic: The European Qur’an: The Qur’ān in European Religious an
d Cultural History\n\nSpeakers:\nMERCEDES GARCÍA-ARENAL (Consejo Superior
de Investigaciones\nCientíficas [CCHS-CSIC]\, Madrid)\nJAN LOOP (København
s Universitet)\nJOHN TOLAN (Université de Nantes)\nROBERTO TOTTOLI (Univer
sita degli Studi di Napoli L'Orientale)\n\n“The European Qur’ān” (EuQu: ht
tps://euqu.eu/) is an ongoing\nproject funded by a Synergy Grant of the Eu
ropean Research Council\n(ERC)\, dedicated to the important place of the M
uslim holy book in\nEuropean cultural and religious history. From the 12th
century to the\n19th\, European Christians read the Qur’ān in Arabic\, tr
anslated\nit into Latin\, Greek and various vernacular languages\, refuted
it in\npolemical treatises\, and mined it for information about Islam and
Arab\nhistory. The “European Qur’ān”\, in its various manifestations\n(Ar
abic editions\, Latin and vernacular translations) should be\nconceived as
scholarly efforts to understand Islam\; as weapons in\npolemical exchange
s between divergent versions of Christianity\; as\nfinancial ventures on t
he part of printers and publishers\; and as\ntools for the understanding o
f Semitic languages\, Arab history and\nculture\, and the history of monot
heism.\n\nThe team that leads the project —Mercedes García-Arenal\, John\n
Tolan\, Roberto Tottoli\, Jan Loop— with their respective units in\nMadrid
\, Nantes\, Naples and Copenhagen\, will be dealing with various\naspects
of the transmission\, translation\, uses and study of\nthe Qur’ān in Euro
pe\, on the role the Qur’ān played in\ndebates about European cultural and
religious identities\, and more\nbroadly about the place of the Qur’ān in
European culture. \n\nRegister in advance for this webinar here\n[https:/
/theias.zoom.us/webinar/register/WN_b87bCUngQnK4ZPk0JZRLKw].\nAfter regist
ering\, you will receive a confirmation email containing\ninformation abou
t joining the webinar.\n
DTSTART:20210210T170000Z
DTEND:20210210T170000Z
LAST-MODIFIED:20210127T135702Z
LOCATION:Webinar
SUMMARY:Near Eastern Studies Lecture
URL:https://www.ias.edu/events/near-eastern-studies-lecture-3
END:VEVENT
BEGIN:VEVENT
UID:0453ef79-11a0-44e2-9ef0-3aecb34c2582
DTSTAMP:20210308T215705Z
CREATED:20210106T002924Z
DESCRIPTION:Topic: Equivariantization and de-equivariantization\n\nSpeakers
: Shotaro Makisumi\n\nAffiliation: Columbia University\; Member\, School o
f Mathematics\n\nThis is the second in a series of talks on 'two realizati
ons.' We\ndiscuss equivariantization and de-equivariantization for a group
$G$\,\nwhich relate categories with $G$-actions and categories with\nRepG
-actions\, and how this relates to the notion of category over a\nstack. W
e will deduce a 'deequivariantization principle' will be\nhelpful in under
standing the proof strategy of Arkhipov-Bezrukavnikov\nand the full 'two r
ealizations\,' to be explained in future talks.\n
DTSTART:20210210T200000Z
DTEND:20210210T220000Z
LAST-MODIFIED:20210205T220959Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-17
END:VEVENT
BEGIN:VEVENT
UID:e3c635a0-f0de-4335-adc9-101e5d2c8231
DTSTAMP:20210308T215705Z
CREATED:20210106T004743Z
DESCRIPTION:Topic: Quantum Integer Valued Polynomials\n\nSpeakers: Nate Har
man\n\nAffiliation: Member\, School of Mathematics\n\nIn algebraic combina
torics there well known objects called q-integers\,\nq-binomial coefficien
ts\, and q-factorials which for lack of a better\nword 'q-ify' the usual i
ntegers\, binomial coefficients\, and\nfactorials. I will explain these no
tions (and say a bit about why they\nare interesting) and then tell the st
ory of how and why Sam Hopkins\nand I q-ified the ring of integer valued p
olynomials.\n
DTSTART:20210210T223000Z
DTEND:20210211T000000Z
LAST-MODIFIED:20210208T190826Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-199
END:VEVENT
BEGIN:VEVENT
UID:ced7683c-4b18-46bd-a53c-ee81435d9308
DTSTAMP:20210308T215705Z
CREATED:20201210T013038Z
DESCRIPTION:
DTSTART:20210211T150000Z
DTEND:20210211T170000Z
LAST-MODIFIED:20210106T041727Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-16
END:VEVENT
BEGIN:VEVENT
UID:3668a95f-3b27-41fe-875c-56f41350df75
DTSTAMP:20210308T215705Z
CREATED:20210113T163732Z
DESCRIPTION:Topic: Structure and dynamics of the Galactic stellar halo\n\nS
peakers: Helmer Herman Koppelman\n\nAffiliation: The Institute for Advance
d Study\n\nThe Milky Way is a unique testbed for theories of galaxy format
ion and\nevolution. Especially the stellar halo is amenable to studies int
o our\ngalaxy’s past both because it contains some of the oldest stars and
\nbecause the dynamical timescales are long. The most recent development\n
in the field is the realization of the level of interconnectedness of\nall
the components of the Milky Way — and the interactions with\nneighboring
satellite galaxies. In this talk\, I will discuss some of\nmy latest resul
ts on the structure of the Milky Way’s halo and place\nthese in the contex
t of these recent developments. One of these\nresults is the selection met
hod of a large sample of halo stars from\nthe Gaia 5D data set (without li
ne-of-sight velocities). I used this\nsample to determine the escape veloc
ity of the Milky Way at the\nlocation of the Sun\, which is a direct measu
rement of the galactic\npotential. Furthermore\, I will discuss a method t
o calculate the\nevolution of gaps in cold stellar streams that are create
d by\ninteractions with dark matter subhalos. And\, finally\, I will show
a\nresult that not all structures in dynamical spaces (e.g. orbital\nfrequ
ency space) are related to interactions and or to the merger\nhistory of t
he Milky Way.\n
DTSTART:20210211T160000Z
DTEND:20210211T170000Z
LAST-MODIFIED:20210209T194813Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-2
END:VEVENT
BEGIN:VEVENT
UID:f8b15549-34f6-48fb-87a7-d361f47f7a65
DTSTAMP:20210308T215705Z
CREATED:20210114T170330Z
DESCRIPTION:Topic: Betelgeuse Is Pretty Cool: Cosmic Questions for our Nake
d-Eye Neighbor\n\nSpeakers: Emily Levesque\n\nAffiliation: University of W
ashington\n\nBetelgeuse's 'Great Dimming' in the winter of 2020 quickly be
came a\nsource of fascination for both professional and amateur astronomer
s.\nDrastic enough to be easily detected with the naked eye\, the star's\n
drop in brightness was unprecedented in observational memory and\nrevealed
the extent to which the workings of red supergiants (RSGs)\nare still a m
ystery. RSGs are the coldest and physically-largest\nmembers of the massiv
e star population\, making them ideal sources for\nstudying the extremes o
f stellar physics and a key turning point in\nthe evolution of post-main-s
equence massive stars. They are also the\nprogenitors of Type II-P superno
vae\, an intermediate evolutionary\nphase in the lifetimes of some strippe
d-envelope supernova\nprogenitors\, and a crucial step in the formation of
massive binary\nsystems (including those that will ultimately produce com
pact object\nbinaries and gravitational waves). However\, our recent studi
es of\nBetelgeuse have forced us to confront the many unanswered questions
\nthat still surround RSGs\, including their binary fraction and\nevolutio
n\, their place in the larger picture of massive star\nevolution\, and the
numerous physical phenomena that drive their\nvariability. Using Betelgeu
se and its recent behavior as an archetype\,\nthis talk will provide an ov
erview of our current knowledge of RSGs\,\nidentify some of the most press
ing open questions about these stars\,\nand consider the importance of stu
dying RSGs in the coming decade as\nthe next generation of observatories c
omes online.\n
DTSTART:20210211T183000Z
DTEND:20210211T193000Z
LAST-MODIFIED:20210205T154632Z
LOCATION:Virtual Meeting
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
3
END:VEVENT
BEGIN:VEVENT
UID:81a580a9-ce6f-4c7f-8015-6a36f9a22b3b
DTSTAMP:20210308T215705Z
CREATED:20210107T004859Z
DESCRIPTION:Topic: Center of quantum group\n\nSpeakers: Arun Kannan\n\nAffi
liation: Massachusetts Institute of Technology\n\nContinuation of the talk
from Feb 4.\n
DTSTART:20210211T210000Z
DTEND:20210211T230000Z
LAST-MODIFIED:20210211T142041Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-2
END:VEVENT
BEGIN:VEVENT
UID:acd822d6-cce0-4c11-934b-24ab42869638
DTSTAMP:20210308T215705Z
CREATED:20210106T011013Z
DESCRIPTION:Topic: Cohomology of Arithmetic Groups and Endoscopy\n\nSpeaker
s: Mathilde Gerbelli-Gauthier\n\nAffiliation: Member\, School of Mathemati
cs\n\nHow fast do Betti numbers grow in a congruence tower of compact\nari
thmetic manifolds? The dimension of the middle degree of cohomology\nis pr
oportional to the volume of the manifold\, but away from the\nmiddle the g
rowth is known to be sub-linear in the volume. I will\nexplain how automor
phic representations and the phenomenon of\nendoscopy provide a framework
to understand and quantify this slow\ngrowth. Specifically\, I will discus
s how to obtain some explicit\nbounds in the case of unitary groups using
Arthur’s stable trace\nformula.\n
DTSTART:20210211T213000Z
DTEND:20210211T223000Z
LAST-MODIFIED:20210204T171244Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-438
END:VEVENT
BEGIN:VEVENT
UID:09819fcd-74b1-4aad-8a56-1ba36d3cdbd8
DTSTAMP:20210308T215705Z
CREATED:20210106T021843Z
DESCRIPTION:Topic: Non-displaceable Lagrangian links in four-manifolds\n\nS
peakers: Cheuk Yu Mak\n\nAffiliation: University of Edinburgh\n\nOne of th
e earliest fundamental applications of Lagrangian Floer\ntheory is detecti
ng the non-displaceablity of a Lagrangian\nsubmanifold. Many progress and
generalisations have been made since\nthen but little is known when the La
grangian submanifold is\ndisconnected. In this talk\, we describe a new id
ea to address this\nproblem. Subsequently\, we explain how to use Fukaya-O
h-Ohta-Ono and\nCho-Poddar theory to show that for every $S^2 \times S^2$
with a\nnon-monotone product symplectic form\, there is a continuum of\ndi
sconnected\, non-displaceable Lagrangian submanifolds such that each\nconn
ected component is displaceable. This is a joint work with Ivan\nSmith.\n
DTSTART:20210212T141500Z
DTEND:20210212T154500Z
LAST-MODIFIED:20210208T183331Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-58
END:VEVENT
BEGIN:VEVENT
UID:c35ce7ff-6bcf-4c6c-affe-41f85b855731
DTSTAMP:20210308T215705Z
CREATED:20201111T155153Z
DESCRIPTION:Topic: Monotone Arithmetic Circuit Lower Bounds Via Communicati
on Complexity\n\nSpeakers: Arkadev Chattopadhyay\n\nAffiliation: Tata Inst
itute of Fundamental Research\n\nValiant (1980) showed that general arithm
etic circuits with negation\ncan be exponentially more powerful than monot
one ones. We give the\nfirst qualitative improvement to this classical res
ult: we construct a\nfamily of polynomials P-n in n variables\, each of it
s monomials has\npositive coefficient\, such that P-n can be computed by a
\npolynomial-size *depth-three* formula but every monotone circuit\ncomput
ing it has size exp(n^{1/4}/log(n)).\n\nThe polynomial P-n embeds the SINK
o XOR function devised recently by\nChattopadhyay\, Mande and Sherif (201
9) to refute the\nLog-Approximate-Rank Conjecture in communication complex
ity. To prove\nour lower bound for P-n\, we develop a general connection b
etween\ncorruption of combinatorial rectangles by any function f o XOR and
\ncorruption of product polynomials by a certain polynomial P-f that is\na
n arithmetic embedding of f. This connection should be of independent\nint
erest.\n\nUsing further ideas from communication complexity\, we construct
\nanother family of set-multilinear polynomials f(n\,m) such that both\nF(
n\,m) − eps. f(n\,m) and F(n\,m) + eps.f(n\,m) have monotone circuit\ncomp
lexity exp(n/log(n)) if eps >= exp−(Omega(m)) and F(n\,m) is\nthe full se
t-multilinear polynomial over n blocks each of size m\, with\nm=O(nlogn).
The polynomials f(n\,m) have 0/1 coefficients and are in\nVNP. Proving su
ch lower bounds for monotone circuits has been\nadvocated recently by Hrub
eš (2020) as a first step towards proving\nlower bounds against general ci
rcuits via his new approach.\n\n(This is joint work with Rajit Datta and P
artha Mukhopadhyay and is\naccessible at: https://eccc.weizmann.ac.il/repo
rt/2020/166/)\n
DTSTART:20210215T161500Z
DTEND:20210215T171500Z
LAST-MODIFIED:20210216T152245Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-474
END:VEVENT
BEGIN:VEVENT
UID:c9c005f3-6047-4279-80c4-9441c70065ff
DTSTAMP:20210308T215705Z
CREATED:20210114T152024Z
DESCRIPTION:Topic: Imaging low-mass planets within the habitable zones of A
lpha Centauri\n\nSpeakers: Kevin Wagner\n\nAffiliation: University of Ariz
ona\n\nGiant exoplanets on wide orbits have been directly imaged around yo
ung\nstars. If the thermal background in the mid-infrared can be mitigated
\,\nthen exoplanets with lower masses can also be imaged. Here we present
\na ground-based mid-infrared observing approach that enables imaging\nlow
-mass temperate exoplanets around nearby stars\, and in particular\nwithin
the closest stellar system\, Alpha Centauri. Based on 75-80% of\nthe best
quality images from 100 hours of cumulative observations\, we\ndemonstrat
e sensitivity to warm sub-Neptune-sized planets throughout\nmuch of the ha
bitable zone of Alpha Centauri A. This is an order of\nmagnitude more sens
itive than state-of-the-art exoplanet imaging mass\ndetection limits. We a
lso discuss a possible exoplanet or exozodiacal\ndisk detection around Alp
ha Centauri A. However\, an instrumental\nartifact of unknown origin canno
t be ruled out. These results\ndemonstrate the feasibility of imaging rock
y habitable-zone exoplanets\nwith current and upcoming telescopes.\n
DTSTART:20210215T171500Z
DTEND:20210215T181500Z
LAST-MODIFIED:20210212T140536Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-16
END:VEVENT
BEGIN:VEVENT
UID:b6533f54-6c4c-4b08-9059-250dfc830b13
DTSTAMP:20210308T215705Z
CREATED:20201209T231623Z
DESCRIPTION:Topic: No seminar: Presidents' Day\n\n
DTSTART:20210215T190000Z
DTEND:20210215T200000Z
LAST-MODIFIED:20210105T200958Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-353
END:VEVENT
BEGIN:VEVENT
UID:96e9ab25-53d8-46ad-9878-819946bc3284
DTSTAMP:20210308T215705Z
CREATED:20210105T211935Z
DESCRIPTION:Topic: No seminar: Presidents' Day\n\n
DTSTART:20210215T213000Z
DTEND:20210215T223000Z
LAST-MODIFIED:20210106T192911Z
LOCATION:
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-136
END:VEVENT
BEGIN:VEVENT
UID:4b50e811-6f24-4b28-a7d8-f6c22a63f99a
DTSTAMP:20210308T215705Z
CREATED:20201105T141752Z
DESCRIPTION:Topic: High dimensional expanders - Part 2\n\nSpeakers: Shai Ev
ra\n\nAffiliation: Princeton University\n\nExpander graphs are graphs whic
h simultaneously are both sparse and\nhighly connected. The theory of expa
nder graphs received a lot of\nattention in the past half a century\, from
both computer science and\nmathematics. In recent years\, a new theory of
high dimensional\nexpanders have emerged. In his seminal work\, Gromov ra
ised the\nfollowing main question: Do (bounded degree) high dimensional\ne
xpanders exist? A culmination of several works by experts in the\nfield r
esulted in a positive answer to Gromov's question (according to\nhis defin
ition).\n\nIn this talk\, I will give a quick introduction to the theory o
f high\ndimensional expanders\, describe the challenges this theory\noffer
s\, and explain the known techniques to construct such (bounded\ndegree) h
igh dimensional expanders. \n\nThis talk is based on a joint work with Tal
i Kaufman.\n
DTSTART:20210216T153000Z
DTEND:20210216T173000Z
LAST-MODIFIED:20210216T152923Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-469
END:VEVENT
BEGIN:VEVENT
UID:10b89de9-0d00-4bc6-92fc-357a59dc3755
DTSTAMP:20210308T215705Z
CREATED:20210201T192832Z
DESCRIPTION:
DTSTART:20210216T173000Z
DTEND:20210216T183000Z
LAST-MODIFIED:20210201T192901Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-1
END:VEVENT
BEGIN:VEVENT
UID:ff3d3cdb-4972-4d7a-a32b-0619ba62834b
DTSTAMP:20210308T215705Z
CREATED:20210105T221643Z
DESCRIPTION:Topic: Complete Segal spaces and spatial décollage\n\nSpeakers:
Ian Coley\n\nAffiliation: Rutgers University\n\n
DTSTART:20210216T183000Z
DTEND:20210216T203000Z
LAST-MODIFIED:20210212T184146Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-15
END:VEVENT
BEGIN:VEVENT
UID:dbc3e073-4eee-4156-852b-94123498aadb
DTSTAMP:20210308T215705Z
CREATED:20210106T222007Z
DESCRIPTION:Topic: Tilting Character Computations II\n\nSpeakers: Lars Thor
ge Jensen\n\nAffiliation: Member\, School of Mathematics\n\nIn this talk\,
we will put together all ingredients we have seen in the\nlast couple of
talks to describe the algorithm to calculate tilting\ncharacters for reduc
tive algebraic groups in the anti-spherical\nmodule. We will try to illust
rate the most important steps of the\nalgorithm by an example calculation
for $SL_3$ (using Soergel\ncalculus). In the end\, we will mention current
obstacles limiting our\ncalculations and show some results.\n
DTSTART:20210216T200000Z
DTEND:20210216T220000Z
LAST-MODIFIED:20210216T153500Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-13
END:VEVENT
BEGIN:VEVENT
UID:cd7adb62-165d-4027-a406-6932357602fa
DTSTAMP:20210308T215705Z
CREATED:20210115T152722Z
DESCRIPTION:Topic: Evolution of Stellar Feedback in H II Regions\n\nSpeaker
s: Grace Olivier\n\nAffiliation: Ohio State University\n\nStellar feedback
is a necessary component for producing realistic\ngalaxies in simulations
\, but it is often implemented through subgrid\nmodels due to the limited
numerical resolution available. \nObservations are a key to anchor these s
imulations in reality\, but\nthere has been limited work on this front\, e
specially for the\nyoungest\, embedded H II regions. This talk will cover
my recent\nstudy of direct radiation pressure\, dust-processed radiation
pressure\,\nphotoionization heating and shock-heating from stellar winds i
n a\nsample of young H II regions (sources with radii < 0.5 pc). It will
\ncover the most important feedback modes at young ages\, the evolution\no
f these feedback modes\, and the way these results can be implemented\nin
simulations.\n
DTSTART:20210217T160000Z
DTEND:20210217T170000Z
LAST-MODIFIED:20210217T140328Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Star Formation/ISM Rendezvous (SFIR)
URL:https://www.ias.edu/sns/events/princeton-university-star-formationism-r
endezvous-sfir-2
END:VEVENT
BEGIN:VEVENT
UID:27987a59-ebcf-4f0b-9c38-627b48fa7eff
DTSTAMP:20210308T215705Z
CREATED:20210105T233102Z
DESCRIPTION:Topic: Matrix stability of crystallographic groups\n\nSpeakers:
Soren Eilers\n\nAffiliation: University of Copenhagen\n\nSome years ago\,
I proved with Shulman and Sørensen that precisely 12\nof the 17 wallpaper
groups are matricially stable in the operator\nnorm. We did so as part of
a general investigation of when group\n$C^*$-algebras have the semiprojec
tivity and weak matricial\nsemiprojectivity properties — notions which are
standard tools in\nthe classification theory for $C^*$-algebras.\n\nOur r
esults were largely negative\, and recently Dadarlat has provided\na frame
work for understanding the obstructions to matricial stability\nfor discre
te groups. With this perspective\, our results may be seen\nas showing th
at\, at least in this case\, stability ensues when the\nobstructions allow
it.\n\nI intend to go through the proof of this positive result in a form
\naimed at non-$C^*$-algebraists. It must be admitted that the proof is\nv
ery $C^*$-algebraic in nature\, but it goes through a natural\ndimension r
eduction technique (invented by Friis and Rørdam in the\nmid-90’s) which I
can definitely explain and expect could be useful\nin other settings as w
ell.\n
DTSTART:20210217T160000Z
DTEND:20210217T171500Z
LAST-MODIFIED:20210217T142404Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-14
END:VEVENT
BEGIN:VEVENT
UID:35826d38-ec41-4aba-b2a3-39852cdec56c
DTSTAMP:20210308T215705Z
CREATED:20210106T002940Z
DESCRIPTION:Topic: Gaitsgory's central sheaves\n\nSpeakers: Tom Braden\n\nA
ffiliation: University of Massachusetts\, Amherst\; Member\, School of Mat
hematics\n\nA theorem of Bernstein identifies the center of the affine Hec
ke\nalgebra of a reductive group $G$ with the Grothendieck ring of the\nte
nsor category of representations of the dual group $G^\vee$.\nGaitsgory co
nstructed a functor which categrorifies this result. This\nfunctor sends S
atake sheaves on the affine Grassmannian of $G$ to\nIwahori-equivariant pe
rverse sheaves on the affine flag variety\, and\nthe sheaves in the image
lie in the center of this category. The\nfunctor is given as nearby cycles
for a family over a curve whose\ngeneral fiber is the affine Grassmannian
times the finite flag variety\nand whose special fiber is the affine flag
variety. As a result\, the\nfunctor carries an important additional struc
ture\, an endomorphism\ncoming from monodromy of nearby cycles.\n
DTSTART:20210217T200000Z
DTEND:20210217T220000Z
LAST-MODIFIED:20210212T193802Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-18
END:VEVENT
BEGIN:VEVENT
UID:73b10464-7f15-4d64-b994-78ecaaf1ada3
DTSTAMP:20210308T215705Z
CREATED:20210106T004801Z
DESCRIPTION:Topic: Why is $N_{\Gamma_0(12)}^{\mathrm{new}}(\lambda)$ of coc
ompact type?\n\nSpeakers: Terrence Blackman\n\nAffiliation: Medgar Evers C
ollege\, The City University of New York\; Visitor\, School of Mathematics
\n\nI will speak\, broadly\, on\, the arithmetic and geometry of quaternio
n\nalgebras and aspects of the spectral theory of automorphic laplacians.
\nI will describe spectral correspondences between spaces of Maass\nwavefo
rms on the unit group of a quaternion algebra and spaces of mass\nforms on
a nicely related congruence subgroup of the modular group.\nThese corresp
ondences are predicted by the Jacquet-Langlands\ncorrespondence.\n
DTSTART:20210217T223000Z
DTEND:20210218T000000Z
LAST-MODIFIED:20210211T154329Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-200
END:VEVENT
BEGIN:VEVENT
UID:9d42ce1c-0a02-44bd-9d1a-c99d68168cca
DTSTAMP:20210308T215705Z
CREATED:20201210T013050Z
DESCRIPTION:
DTSTART:20210218T150000Z
DTEND:20210218T170000Z
LAST-MODIFIED:20210106T041826Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-17
END:VEVENT
BEGIN:VEVENT
UID:e3128467-1318-478d-8a08-88e575ea0e99
DTSTAMP:20210308T215705Z
CREATED:20210113T163825Z
DESCRIPTION:Topic: Zoology of graviton non-Gaussianities during inflation\n
\nSpeakers: Giovanni Cabass\n\nAffiliation: The Institute for Advanced Stu
dy\n\nI discuss graviton non-Gaussianities in models of inflation where de
\nSitter isometries are spontaneously broken. First\, I review the\ndiffer
ent symmetry breaking patterns following Nicolis\, Penco\, Piazza\,\nRatta
zzi (2015)\, and discuss which of them can sustain a period of\nquasi de S
itter expansion. I then show that the symmetry breaking\npattern of Solid
Inflation captures all the allowed graviton\ninteractions. I conclude by l
ooking at the phenomenological\nconsequences of some of these interactions
\, and briefly comment on the\nrelation with recently-developed variants o
f the cosmological\nbootstrap approach that do not assume linear realizati
on of de Sitter\nisometries.\n
DTSTART:20210218T160000Z
DTEND:20210218T170000Z
LAST-MODIFIED:20210212T142730Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-3
END:VEVENT
BEGIN:VEVENT
UID:7414b0c2-df6a-431d-ade5-87293cbecc3d
DTSTAMP:20210308T215705Z
CREATED:20210107T004916Z
DESCRIPTION:Topic: R-matrices\n\nSpeakers: Elijah Bodish\n\nAffiliation: Un
iversity of Oregon\n\n
DTSTART:20210218T210000Z
DTEND:20210218T230000Z
LAST-MODIFIED:20210218T143828Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-3
END:VEVENT
BEGIN:VEVENT
UID:fe266c81-bb9d-4182-8d08-dac8203848e8
DTSTAMP:20210308T215705Z
CREATED:20210106T011031Z
DESCRIPTION:Topic: Exceptional jumps of Picard rank of K3 surfaces over num
ber fields\n\nSpeakers: Salim Tayou\n\nAffiliation: Member\, School of Mat
hematics\n\nGiven a K3 surface $X$ over a number field $K$\, we prove that
the set\nof primes of $K$ where the geometric Picard rank jumps is infini
te\,\nassuming that $X$ has everywhere potentially good reduction. This\nr
esult is formulated in the general framework of GSpin Shimura\nvarieties a
nd I will explain other applications to abelian surfaces. I\nwill also dis
cuss applications to the existence of rational curves on\nK3 surfaces. The
results in this talk are joint work with Ananth\nShankar\, Arul Shankar a
nd Yunqing Tang.\n
DTSTART:20210218T213000Z
DTEND:20210218T223000Z
LAST-MODIFIED:20210218T144126Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-439
END:VEVENT
BEGIN:VEVENT
UID:07a9e02e-ee87-4a5d-832d-75d550f46e62
DTSTAMP:20210308T215705Z
CREATED:20210216T143409Z
DESCRIPTION:Topic: Collisional transport in large aspect ratio stellarators
\n\nSpeakers: Felix I. Parra\n\nAffiliation: University of Oxford\n\nColli
sional transport at the small collision frequencies\ncharacteristic of fus
ion reactors can be enormous in stellarators. In\norder to reduce this tra
nsport and the associated energy loss\, the\nposition and strength of the
external magnets that produce the\nmagnetic field in stellarators must be
optimized. In this talk\, I will\nrevisit collisional transport in the par
ticularly interesting limit of\nlarge aspect ratio stellarators. I will de
rive a new formulation to\ncalculate collisional transport in the small co
llision frequency\nregime relevant to stellarator reactors. This new formu
lation has been\nimplemented in KNOSOS (KiNetic Orbit-averaging SOlver for
\nStellarators)\, a very efficient\, fast code that calculates collisional
\ntransport in a variety of regimes and can hence be used in stellarator\n
optimization exercises. I will show both numerical and analytical\nresults
obtained using the new model that illustrate the nature of\nstellarator c
ollisional transport at small collision frequencies.\n
DTSTART:20210219T140000Z
DTEND:20210219T150000Z
LAST-MODIFIED:20210217T144630Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astrophysical Sciences Special Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astrophysical-scien
ces-special-seminar
END:VEVENT
BEGIN:VEVENT
UID:0c3770fc-5c6c-4054-894c-522984043405
DTSTAMP:20210308T215705Z
CREATED:20210106T021859Z
DESCRIPTION:Topic: Intrinsic mirror symmetry and categorical crepant resolu
tions\n\nSpeakers: Daniel Pomerleano\n\nAffiliation: University of Massach
usetts\, Boston\n\nGross and Siebert have recently proposed an 'intrinsic'
programme for\nstudying mirror symmetry. In this talk\, we will discuss a
symplectic\ninterpretation of some of their ideas in the setting of affin
e log\nCalabi-Yau varieties. Namely\, we describe work in progress which s
hows\nthat\, under suitable assumptions\, the wrapped Fukaya category of s
uch\na variety $X$ gives an intrinsic 'categorical crepant resolution' of
\n$Spec(SH^0(X))$. No background in mirror symmetry will be assumed for\nt
he talk.\n
DTSTART:20210219T141500Z
DTEND:20210219T154500Z
LAST-MODIFIED:20210211T190406Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-59
END:VEVENT
BEGIN:VEVENT
UID:ecd9f8b4-e0bc-4336-bf21-4b8bd5b148b7
DTSTAMP:20210308T215705Z
CREATED:20201217T164200Z
DESCRIPTION:Topic: The Turn to the Medieval in Ethiopian Studies – The Turn
to Ethiopia in Medieval Studies I\n\nThis is the second event of the webi
nar series IAS Ethiopian Studies\n\nCONVENORS: Suzanne Akbari (IAS)\, Aaro
n Butts (CUA / IAS)\, Samantha L.\nKelly (Rutgers U / IAS)\, Sabine Schmid
tke (IAS)\n\nWe are eager to think together about the rich and often chall
enging\ncomplexities that have arisen as a result of the intersection of\n
Medieval Studies and Ethiopian Studies over the past several years.\nThese
fields developed along very different lines\, but have begun to\nmutually
enrich – and interrogate – one another. In terms of\nregional networks\,
the two fields overlap in their concern with\npolitical\, commercial\, and
cultural connections in the eastern\nMediterranean: while Ethiopia repres
ents for Medieval Studies an\noutgrowth of Mediterranean Studies\, extendi
ng investigation for such\nexchanges down the Red Sea\, Europe similarly r
epresents for Ethiopian\nStudies a secondary ring of this zone of contact.
Additional\ninformation here\n[https://www.ias.edu/hs/ias-ethiopian-studi
es-series]. REGISTER IN\nADVANCE FOR THIS MEETING HERE\n[https://theias.z
oom.us/meeting/register/tZwtdOyrqzsvGdfaV1gU6afG5y_YLe1foY9A%C2%A0].\n\nPa
nelists:\nANDREA ACHI (Department of Medieval Art and The Cloisters at the
\nMetropolitan Museum)\nMARIE-LAURE DERAT (Centre National de la Recherche
Scientifique)\nKRISTEN WINDMULLER-LUNA (Cleveland Museum of Art)\nFELEGE-
SELAM YIRGA (The University of Tennessee Knoxville)\n
DTSTART:20210219T170000Z
DTEND:20210219T183000Z
LAST-MODIFIED:20210113T210610Z
LOCATION:ZOOM Meeting
SUMMARY:IAS Ethiopian Studies Series
URL:https://www.ias.edu/hs/events/ias-ethiopian-studies-series
END:VEVENT
BEGIN:VEVENT
UID:c29a3195-0354-4711-9858-2db8109c731d
DTSTAMP:20210308T215705Z
CREATED:20210205T160406Z
DESCRIPTION:Topic: Primordial vs astrophysical models for the emergence of
cosmic magnetism: an observational and theoretical challenge\n\nSpeakers:
Franco Vazza\n\nAffiliation: University of Bologna\n\nGalaxy clusters and
filaments of the cosmic web are giant and perfect\nplasma laboratories in
the Universe\, which can tell us about the\ngrowth of cosmic magnetism fro
m either primordial or astrophysical\nseed field\, as well as about the ac
celeration of cosmic rays by\nviolent accretion processes.\n\nI will revie
w recent results in the numerical modelling of such\nobjects\, with the fi
nal goal of understanding the mysterious origin of\ncosmic magnetism\, and
use existing or future radio observations to\ntest and kill competing the
oretical models\, spanning from the range of\nradio jets from AGN to that
of giant cosmic filaments.\n
DTSTART:20210219T173000Z
DTEND:20210219T190000Z
LAST-MODIFIED:20210212T144241Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-2
END:VEVENT
BEGIN:VEVENT
UID:bbbe007b-320a-4d7e-b7e8-8d67dd7a89fb
DTSTAMP:20210308T215705Z
CREATED:20210115T162553Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210219T200000Z
DTEND:20210219T210000Z
LAST-MODIFIED:20210212T145214Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-4
END:VEVENT
BEGIN:VEVENT
UID:5834db38-0105-4745-91da-1c072546abf3
DTSTAMP:20210308T215705Z
CREATED:20210114T141535Z
DESCRIPTION:Topic: How many elements matter?\n\nSpeakers: Yuan-Sen Ting\n\n
Affiliation: The Institute for Advanced Study\n\nEach week\, we hold a rel
atively informal seminar/discussion series\nwith an emphasis on extra-gala
ctic and large-scale structure\nastrophysics.\n\nDuring Galread a leader/v
isitor presents a recent paper to the\ndiscussion group. The PDF of the pa
per is projected onto a large\nscreen\, and a guest explains the paper\, s
ection by section\, in greater\ndetail than may be explained within the te
xt of the article. To aid\nwith discussion\, only the article PDF is prese
nted -- no\npowerpoint-style slides. Galread discussions are very friendly
and\ninteractive.\n
DTSTART:20210222T160000Z
DTEND:20210222T170000Z
LAST-MODIFIED:20210219T135213Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-3
END:VEVENT
BEGIN:VEVENT
UID:23566780-4e16-44d0-bec2-1853fd2dcd19
DTSTAMP:20210308T215705Z
CREATED:20201105T141054Z
DESCRIPTION:Topic: Optimal Mixing of Glauber Dynamics: Entropy Factorizatio
n via High-Dimensional Expansion\n\nSpeakers: Zongchen Chen\n\nAffiliation
: Georgia Institute of Technology\n\nWe consider the Glauber dynamics (als
o called Gibbs sampling) for\nsampling from a discrete distribution in hig
h-dimensional space (e.g.\,\nselecting a uniformly random legal coloring o
r independent set in a\ngiven graph\, or selecting a 'typical' state in a
given statistical\nphysics model\, like spin systems). In these probabilis
tic\nalgorithms\, each step picks uniformly at random a single variable\,
\nand updates it conditional on all other variables. Note that\, if the\nn
umber of variables (= the dimension) is n\, such MCMC (Monte Carlo\nMarkov
Chain) algorithms perform a random walk on an exponential (in\nn) size sp
ace.\n\nWe show an optimal mixing time bound for the Glauber dynamics in a
\nvariety of settings. Our work presents an improved version of the\nspect
ral independence approach of Anari et al. (2020) and shows\nO(nlogn) mixin
g time for graphical models/spin systems on any n-vertex\ngraph of bounded
degree\, when the maximum eigenvalue of an associated\ninfluence matrix i
s bounded. Our proof approach combines classic tools\nof entropy tensoriza
tion/factorization and recent developments of\nhigh-dimensional expanders.
\n\nBased on joint work with Kuikui Liu and Eric Vigoda. \n
DTSTART:20210222T161500Z
DTEND:20210222T171500Z
LAST-MODIFIED:20210222T160126Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-475
END:VEVENT
BEGIN:VEVENT
UID:0fce77a9-8ce1-480d-9834-f1c02c4d2c95
DTSTAMP:20210308T215705Z
CREATED:20210114T152102Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210222T170000Z
DTEND:20210222T180000Z
LAST-MODIFIED:20210219T153231Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group
END:VEVENT
BEGIN:VEVENT
UID:2e9810c4-0ccc-4e0d-a145-86838573c8d0
DTSTAMP:20210308T215705Z
CREATED:20210216T143649Z
DESCRIPTION:Topic: Physics of the Tokamak Pedestal\, and Implications for M
agnetic Fusion Energy\n\nSpeakers: Philip Snyder\n\nAffiliation: General A
tomics\n\nFusion\, the process that powers the stars\, offers the potentia
l to\nprovide plentiful clean energy here on earth. Magnetic confinement o
f\nhigh temperature plasmas in toroidal devices known as tokamaks is a\npr
omising approach to fusion\, one that has successfully produced\nmillions
of watts of fusion power. High performance in tokamaks is\nachieved via th
e spontaneous formation of a transport barrier in the\nouter few percent o
f the confined plasma. This narrow insulating\nlayer\, referred to as a “p
edestal\,” typically results in a >30x\nincrease in pressure across a 0.4-
5cm layer. The overlap of drift\norbit\, turbulence\, and equilibrium scal
es across this narrow layer\nleads to rich and complex physics\, and chall
enges traditional analytic\nand computational approaches. Development of h
igh resolution\ndiagnostics\, and coordinated experiments on several tokam
aks\, have\nvalidated understanding of important aspects of the physics\,
while\nhighlighting open issues. A predictive model (EPED) has proven capa
ble\nof predicting the pedestal height and width to ~20-25% accuracy in\nl
arge statistical studies. This model was used to predict a new\, high\nped
estal “Super H-Mode” regime\, which was subsequently discovered\non DIII-D
\, leading to high fusion performance\, and motivated\nexperiments on Alca
tor C-Mod which achieved world record\, reactor\nrelevant pedestal pressur
e. Coupling this new understanding of\npedestal physics to models of the c
ore plasma enables extensive\noptimization of global fusion performance\,
including development of\nattractive scenarios for a fusion pilot plant.\n
DTSTART:20210222T170000Z
DTEND:20210222T180000Z
LAST-MODIFIED:20210219T154236Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astrophysical Sciences Special Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astrophysical-scien
ces-special-seminar-0
END:VEVENT
BEGIN:VEVENT
UID:dad96cb7-0778-461d-ad76-1f484e8d8abc
DTSTAMP:20210308T215705Z
CREATED:20210114T150157Z
DESCRIPTION:Topic: General Discussion\n\nSpeakers: Giovanni Cabass\n\nAffil
iation: The Institute for Advanced Study\n\n
DTSTART:20210222T173000Z
DTEND:20210222T190000Z
LAST-MODIFIED:20210219T172527Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-2
END:VEVENT
BEGIN:VEVENT
UID:2616091a-f439-402e-bc6d-323d3451689b
DTSTAMP:20210308T215705Z
CREATED:20201209T231637Z
DESCRIPTION:Topic: Astrophysical fluid dynamics\n\nSpeakers: James Stone\n
\nAffiliation: Professor\, School of Natural Sciences\n\nMost of the visib
le matter in the Universe is a plasma\, that is a\ndilute gas of ions\, el
ectrons\, and neutral atoms. In many\ncircumstances\, the dynamics of this
plasma can be modeled in the\ncontinuum limit\, using the equations of fl
uid mechanics. Unlike most\nterrestrial flows\, however\, astrophysical pl
asmas are highly\ncompressible and strongly affected by additional physics
such as\nmagnetic fields\, radiation transport\, and gravity. I will intr
oduce\nthe kind of problems astrophysicists study using fluid mechanics\,
\ndiscuss the importance of additional physics to model such problems\nrea
listically\, and describe numerical methods that are essential for\ninvest
igation of the nonlinear regime. Finally I will highlight one\napplication
of these methods: accretion of plasma into black holes.\n
DTSTART:20210222T190000Z
DTEND:20210222T200000Z
LAST-MODIFIED:20210222T160616Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-354
END:VEVENT
BEGIN:VEVENT
UID:e35db960-891f-4737-9778-53060930edbf
DTSTAMP:20210308T215705Z
CREATED:20210105T211953Z
DESCRIPTION:Topic: Spread of infections in random walkers\n\nSpeakers: Alla
n Sly\n\nAffiliation: Princeton University\n\nWe consider a class of inter
acting particle systems with two types\, A\nand B which perform independen
t random walks at different speeds. Type\nA particles turn into type B whe
n they meet another type B particle.\nThis class of systems includes model
s of infections and multi-particle\ndiffusion limited aggregation. I will
describe new methods to\nunderstand growth processes in such models.\n\nJo
int work with Duncan Dauvergne\, Danny Nam and Dor Elboim.\n
DTSTART:20210222T213000Z
DTEND:20210222T223000Z
LAST-MODIFIED:20210222T161124Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-137
END:VEVENT
BEGIN:VEVENT
UID:09bafc9d-8899-447d-9256-14b874fa6735
DTSTAMP:20210308T215705Z
CREATED:20201105T142008Z
DESCRIPTION:Topic: Introduction to Laplacian Linear Systems for Undirected
Graphs\n\nSpeakers: John Peebles\n\nAffiliation: Member\, School of Mathem
atics\n\nThis talk gives an introduction on how to quickly solve linear sy
stems\nwhere the matrix of the system is the Laplacian matrix of any\nundi
rected graph. No prior familiarity with optimization is assumed.\nIn the p
rocess\, we will cover:\n\n * what positive semidefinite matrices are and
why mathematicians say\nthey 'behave like nonnegative numbers' (mainly int
ended as a review)\n * the Loewner ordering (standard PSD ordering) on pos
itive\nsemidefinite matrices and how it provides a natural definition of\n
'multiplicative approximation' for them\n * Richardson iteration / gradien
t descent for solving quadratic\nminimization problems\n * preconditioning
and why we care about the sparsity of the matrix\nwhen trying to solve li
near systems quickly\n * spectral sparsification of graphs (presented/used
as a black box\nstatement)\n * the Peng-Spielman algorithm for solving la
placian linear systems\nin nearly linear time. (Solves a Laplacian linear
system with m\nnonzero entries in m*polylog(m) time. This is only slightly
more than\nthe time it takes to write down the system. Compared to the be
st\nruntime achievable using fast matrix multiplication algorithms\, even
\nif the exponent for matrix multiplication is 2\, the Peng-Speilman\nalgo
rithm is much faster in sparse graphs. Even in dense graphs\, it is\nnever
slower by more than a polylogarithmic factor.)\n\n
DTSTART:20210223T153000Z
DTEND:20210223T173000Z
LAST-MODIFIED:20210223T132831Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-470
END:VEVENT
BEGIN:VEVENT
UID:0d3065f6-444d-405c-aa11-cee2eb4f43f6
DTSTAMP:20210308T215705Z
CREATED:20210201T193029Z
DESCRIPTION:
DTSTART:20210223T173000Z
DTEND:20210223T183000Z
LAST-MODIFIED:20210201T193101Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-2
END:VEVENT
BEGIN:VEVENT
UID:14d8d1fa-0536-41f7-a22d-d8d1f2f0c7ce
DTSTAMP:20210308T215705Z
CREATED:20210105T221702Z
DESCRIPTION:Topic: ∞-topoi in topology and geometry\n\nSpeakers: Emanuel Re
inecke\n\nAffiliation: Member\, School of Mathematics\n\n
DTSTART:20210223T183000Z
DTEND:20210223T203000Z
LAST-MODIFIED:20210218T205124Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-16
END:VEVENT
BEGIN:VEVENT
UID:c667b7ca-501a-45fe-9517-a3c4996d6b2d
DTSTAMP:20210308T215705Z
CREATED:20210106T222023Z
DESCRIPTION:Topic: Billiards and Boats\n\nSpeakers: Lars Thorge Jensen\n\nA
ffiliation: Member\, School of Mathematics\n\nIn this talk we will present
two perspectives on the p-Kazhdan-Lusztig\nbasis and its combinatorics\,
giving a glimpse of its complexity. This\ntalk does not provide many answe
rs\, but will hopefully raise many\ninteresting questions and is based on
ongoing work in progress.\n
DTSTART:20210223T200000Z
DTEND:20210223T220000Z
LAST-MODIFIED:20210222T172816Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-14
END:VEVENT
BEGIN:VEVENT
UID:ac95245a-04c5-4809-bec8-1fda59ef28bb
DTSTAMP:20210308T215705Z
CREATED:20210115T152837Z
DESCRIPTION:Topic: Giant molecular clouds in simulated galaxies\n\nSpeakers
: Robin Tree\n\nAffiliation: Max Planck Institute for Astronomy\, Heidelbe
rg\n\nStudying GMCs within their galactic context is important to understa
nd\nthe origin of their internal dynamics and their connection to the\nloc
al environment. We therefore perform high resolution simulations of\nthe I
SM in interesting dynamic environments to stress-test the\nreaction of the
molecular gas to these complex configurations. In\nparticular we examine
the gas response to a galaxy encounter on one\nhand and ISM dynamics in th
e presence of a galactic bar on the other\nhand. \n\nIn the former case we
explore GMC properties in an interacting\nM51-like galaxy system. Here tw
o prominent tidally induced spiral arms\nappear and we study how this larg
e-scale morphological change affects\nthe local molecular gas. In the case
of the galactic bar\, our object\nof interest is the central region of ou
r own Milky Way and we try to\nexplain the complex interplay between gas d
ynamics and the bar in this\nregion.\n
DTSTART:20210224T160000Z
DTEND:20210224T170000Z
LAST-MODIFIED:20210223T140055Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Star Formation/ISM Rendezvous (SFIR)
URL:https://www.ias.edu/sns/events/princeton-university-star-formationism-r
endezvous-sfir-3
END:VEVENT
BEGIN:VEVENT
UID:63923086-a2c0-4a4c-a410-fe12501906bf
DTSTAMP:20210308T215705Z
CREATED:20210105T233119Z
DESCRIPTION:Topic: Norm stability in the unitary case from Voiculescu to Gr
omov-Lawson\n\nSpeakers: Shmuel Weinberger\n\nAffiliation: University of C
hicago\n\nThis expository talk will try to bridge the first examples of 'a
lmost\ncommuting' unitary matrices that are not almost 'commuting unitarie
s'\ndue to Voiculescu to a more sophisticated and very beautiful\nconstruc
tion of examples by Gromov and Lawson in the early 80's that\nis intimatel
y connected to deep phenomena in topology and geometry\nrelated to the rol
e of fundamental group. It can serve as an\nintroduction to Dadarlat's tal
k.\n\nIf I inadvertently say anything new and correct\, it will be joint w
ork\nwith Alex Lubotzky or Guoliang Yu. However\, I expect that most of th
e\ntalk will be about ideas well known before half the audience was born.
\n
DTSTART:20210224T160000Z
DTEND:20210224T171500Z
LAST-MODIFIED:20210224T135730Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-15
END:VEVENT
BEGIN:VEVENT
UID:b33f1cea-80c0-4390-824e-91e0a71b76af
DTSTAMP:20210308T215705Z
CREATED:20200921T191914Z
DESCRIPTION:Topic: Early Modern European Humanism and the Syriac New Testam
ent\n\nSpeakers: George A. Kiraz\n\nAffiliation: IAS School of Historical
Studies and Beth Mardutho: The Syriac Institute\n\nThe Syriac Bible (speci
fically the New Testament) was first printed in\nEurope in the Early Moder
n period. The protagonists were European\nhumanists who saw in Syriac holy
symbolism. Its closeness to Hebrew\ngave them the illusion that they can
use it to convert Jews to\nChristianity. Its closeness to Arabic—at a time
when the Ottomans\nare knocking on the doors of Europe—misguided them int
o thinking\nthat Moslem souls can be gained through it. The talk gives the
history\nof how Syriac reached Europe and how humanists began to study it
and\npublished numerous editions of the Bible.\n\nRegister in advance for
this webinar here\n[https://theias.zoom.us/webinar/register/WN_50TJQYdkSh
eqTzUaGaAi_Q].\nAfter registering\, you will receive a confirmation email
containing\ninformation about joining the webinar.\n
DTSTART:20210224T170000Z
DTEND:20210224T183000Z
LAST-MODIFIED:20210127T135732Z
LOCATION:Zoom Webinar
SUMMARY:Near Eastern Studies Lecture
URL:https://www.ias.edu/events/near-eastern-studies-lecture-1
END:VEVENT
BEGIN:VEVENT
UID:b69728df-446b-4c62-bf78-36b6c01b6438
DTSTAMP:20210308T215705Z
CREATED:20210106T002955Z
DESCRIPTION:Topic: The affine Hecke category is a monoidal colimit\n\nSpeak
ers: James Tao\n\nAffiliation: Massachusetts Institute of Technology\n\nWe
will discuss the following theorems concerning colimits taken in\nthe inf
inity-category of monoidal DG-categories. (No familiarity with\ninfinity-c
ategories will be required or assumed.) The affine Hecke\ncategory is the
monoidal colimit of its finite type Hecke\nsubcategories. The category of
D-modules on the loop group is the\nmonoidal colimit of the categories of
D-modules on standard parahoric\nsubgroups. These theorems\, and many anal
ogous ones\, are consequences\nof a general inductive characterization of
colimits indexed by a\ncategory of `words' in a Coxeter group. We will als
o discuss two\napplications-in-progress: the construction of a functor fro
m the\naffine to the finite Hecke category in type A\, and the constructio
n of\nnew `deformations' of the affine Hecke category.\n
DTSTART:20210224T200000Z
DTEND:20210224T220000Z
LAST-MODIFIED:20210218T204218Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-19
END:VEVENT
BEGIN:VEVENT
UID:78e8de36-e4f7-4ca4-8a83-e6369639c469
DTSTAMP:20210308T215705Z
CREATED:20210106T004818Z
DESCRIPTION:Topic: Space vectors forming rational angles\n\nSpeakers: Bjorn
Poonen\n\nAffiliation: Massachusetts Institute of Technology\n\nIn 1895\,
Hill discovered a $1$-parameter family of tetrahedra whose\ndihedral angl
es are all rational multiples of $\pi$. In 1976\, Conway\nand Jones relate
d the problem of finding all such tetrahedra to\nsolving a polynomial equa
tion in roots of unity. Many previous authors\nhave solved polynomial equa
tions in roots of unity with $\leq 12$\nmonomials\, but the Conway-Jones p
olynomial has $105$ monomials! I will\nexplain the method we use to solve
it and our discovery that the full\nclassification consists of two $1$-par
ameter families and an explicit\nlist of $59$ sporadic tetrahedra.\n\nBuil
ding on this work\, we classify all configurations of vectors in\n$\mathbb
R^3$ such that the angle between each pair is a rational\nmultiple of $\p
i$. Sample result: Ignoring trivial families and scalar\nmultiples\, any c
onfiguration with more than $9$ vectors is contained\nin a particular $15$
-vector configuration.\n\nThis is joint work with Kiran Kedlaya\, Alexande
r Kolpakov\, and Michael\nRubinstein.\n
DTSTART:20210224T223000Z
DTEND:20210225T000000Z
LAST-MODIFIED:20210222T173734Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-201
END:VEVENT
BEGIN:VEVENT
UID:0c84e4a9-a446-447b-915f-395dc8f9b61f
DTSTAMP:20210308T215705Z
CREATED:20201210T013104Z
DESCRIPTION:
DTSTART:20210225T150000Z
DTEND:20210225T170000Z
LAST-MODIFIED:20210106T041927Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-18
END:VEVENT
BEGIN:VEVENT
UID:05db15c4-29a5-4280-aed3-d990ed89488b
DTSTAMP:20210308T215705Z
CREATED:20210113T163916Z
DESCRIPTION:Topic: Star formation and feedback in low-mass molecular clouds
- a 3D view\n\nSpeakers: Steffi Walch-Gassner\n\nAffiliation: University
of Cologne\n\nStar formation takes place in the densest and coldest parts
of the\ninterstellar medium (ISM)\, in dark molecular clouds. These are sw
ept\nup by multiple supernova explosions on scales of several hundred\npar
sec. While condensing out of the warm ISM\, the clouds are\ncontinuously f
ed with fresh gas. Thus\, the turbulent substructure and\nmagnetic field p
roperties are imprinted during cloud formation. The\nformation of dense cl
ouds from the multi-phase ISM\, the onset of star\nformation\, and the evo
lution of the molecular clouds under the impact\nof stellar feedback from
newly born massive stars is studied in\nhigh-resolution simulations within
the SILCC-Zoom project. \n\nIn this talk I will show how the evolution of
self-consistently formed\nmolecular clouds is governed by stellar feedbac
k from newly born\nmassive stars. Our clouds resemble nearby molecular clo
uds like Taurus\nand Ophiuchus. We find that the detailed cloud substructu
re (and\ntherefore highly localised shielding factors) determine(s) the cl
ouds'\nvulnerability to stellar feedback processes\, in particular to ioni
zing\nradiation. Moreover\, the ionization state of the gas can be highly
\nvariable on scales of tens of parsec due to small-scale turbulent\nmotio
ns within the star-forming clouds\, which shield and release the\nionizing
radiation. This leads to a flickering of the young HII\nregions on the sc
ale of ~10 pc. The efficiency of star formation is\nquite effectively regu
lated by stellar (pre-supernova) feedback on\nsmall scales.\n\nBy means of
synthetic observations\, we also investigate in detail how\nour simulatio
ns would appear to an observer. I will show a few\nexamples focussing on C
O and ionized carbon and discussing CO-dark\nmolecular gas.\n
DTSTART:20210225T160000Z
DTEND:20210225T170000Z
LAST-MODIFIED:20210223T140913Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-4
END:VEVENT
BEGIN:VEVENT
UID:75b56734-ede6-42a3-9b99-513207710039
DTSTAMP:20210308T215705Z
CREATED:20210114T170858Z
DESCRIPTION:Topic: Science\, Spending\, and Sausage Making: Determining Fun
ding for Federal Science Agencies\n\nSpeakers: Jeremy Weirich\n\nAffiliati
on: Association of Universities for Research in Astronomy (AURA)\n\nUsing
astronomy as a backdrop\, this presentation will provide an\noverview of f
ederal spending for science agencies\, namely NASA and\nNSF\, from formula
ting budgets in the Executive Branch to crafting\nappropriation bills in C
ongress. Ambitious science policies and the\ndesire to maintain U.S. compe
titiveness in research fields all help to\ndrive support for science fundi
ng. However\, politics\, competing\npriorities\, and fixed funding caps ar
e external factors in the fight\nfor taxpayer dollars. The objectives of t
he presentation are to\nprovide a better understanding of the funding land
scape that impact\nscience budgets\, demystify the decision-making process
\, and offer some\ninsight on effectively communicating with Congress on s
cience funding.\n
DTSTART:20210225T183000Z
DTEND:20210225T193000Z
LAST-MODIFIED:20210219T170918Z
LOCATION:Virtual Meeting
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
5
END:VEVENT
BEGIN:VEVENT
UID:732c66c2-b3e1-48f5-8dc4-8cee987af182
DTSTAMP:20210308T215705Z
CREATED:20210107T004931Z
DESCRIPTION:Topic: R-matrices\n\nSpeakers: Elijah Bodish\n\nAffiliation: Un
iversity of Oregon\n\nContinuation of the talk from last time.\n
DTSTART:20210225T210000Z
DTEND:20210225T230000Z
LAST-MODIFIED:20210225T124744Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-4
END:VEVENT
BEGIN:VEVENT
UID:bf5c6ef5-d0d3-4d36-9137-cd6f2ece42a1
DTSTAMP:20210308T215705Z
CREATED:20210106T011048Z
DESCRIPTION:Topic: Selmer groups and a Cassels-Tate pairing for finite Galo
is modules\n\nSpeakers: Alexander Smith\n\nAffiliation: Massachusetts Inst
itute of Technology\n\nI will discuss some new results on the structure of
Selmer groups of\nfinite Galois modules over global fields. Tate's defini
tion of the\nCassels-Tate pairing can be extended to a pairing on such Sel
mer\ngroups with little adjustment\, and many of the fundamental propertie
s\nof the Cassels-Tate pairing can be reproved with new methods in this\ns
etting. I will also give a general definition of the theta/Mumford\ngroup
and relate it to the structure of the Cassels-Tate pairing\,\ngeneralizing
work of Poonen and Stoll.\n
DTSTART:20210225T213000Z
DTEND:20210225T223000Z
LAST-MODIFIED:20210225T125220Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-440
END:VEVENT
BEGIN:VEVENT
UID:41c85733-00fe-42ab-b5e3-6ea62dd5e463
DTSTAMP:20210308T215705Z
CREATED:20210106T021915Z
DESCRIPTION:Topic: Twisted generating functions and the nearby Lagrangian c
onjecture\n\nSpeakers: Sylvain Courte\n\nAffiliation: Université Grenoble
Alpes\n\nI will explain the notion of twisted generating function and show
that\na closed exact Lagrangian submanifold $L$ in the cotangent bundle o
f\n$M$ admits such a thing. The type of function arising in our\nconstruct
ion is related to Waldhausen's tube space from his manifold\napproach to a
lgebraic K-theory of spaces. Using the rational\nequivalence of this space
with BO\, as proved by Bökstedt\, we conclude\nthat the stable Lagrangian
Gauss map of $L$ vanishes on all homotopy\ngroups. In particular when $M$
is a homotopy sphere\, we obtain the\ntriviality of the stable Lagrangian
Gauss map and a genuine generating\nfunction for $L$. This is a joint wor
k with M. Abouzaid\, S. Guillermou\nand T. Kragh.\n
DTSTART:20210226T141500Z
DTEND:20210226T154500Z
LAST-MODIFIED:20210217T004852Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-60
END:VEVENT
BEGIN:VEVENT
UID:4058ba57-2913-4438-a835-668d677ce300
DTSTAMP:20210308T215705Z
CREATED:20210205T160730Z
DESCRIPTION:Topic: Non ideal effects in protoplanetary disks: transition fr
om turbulent to Dead Zone in local and global stratified simulations\n\nSp
eakers: Fulvia Pucci\n\nAffiliation: NASA Jet Propulsion Laboratory (JPL)
\n\nThe dynamical evolution of protoplanetary disks (PPDs) is of key\ninte
rest for building a comprehensive theory of planet formation and\nto expla
in the observational properties of these objects. \n\nMuch of what we have
learned about PPDs has come from MHD simulations\n(Balbus and Hawley (200
3)) carried out both by means of local shearing\nbox simulations (LSBS) an
d global simulations (GS). Placing these\nmodels in the context of global
disk structure and its interaction\nwith the central star makes the proble
m very challenging\, involving a\nwide range of temporal and spatial scale
s\, coupled via nonlinear\ndynamical processes\, including radiation\, dis
k chemistry and dust. \n\nIn this talk I will address the physics of the t
ransition between the\nactive turbulent layer of the PPD and the non-ideal
layers\, the so\ncalled “dead zone”. I will present my recently published
result\nwith an isothermal shearing box setup\, using the magnetohydrodyn
amics\ncode Athena++\, in which we quantify how the turbulence level is\na
ffected by the presence of a non-uniform ohmic resistivity in the\nradial
- x direction. Comparing the turbulent activity to that of\nideal simulati
ons\, the turbulence inhibited area shows density\nfluctuations and magnet
ic activity at its boundaries\, driven by energy\ninjection from the activ
e (ideal) zone boundaries. We find magnetic\ndissipation to be significant
ly stronger in the ideal regions\, and the\nturbulence penetration through
the boundary of the dead zone is\ndetermined by the value of the resistiv
ity itself\, through the ohmic\ndissipation process\, though the thickness
of the transition does not\nplay a significant role in changing the dissi
pation. \n\nI will also introduce my preliminary work with Athena++ on glo
bal\nsimulations of a vertically stratified disk\, in which we will take\n
into account the chemistry and thermodynamics of the disk to determine\nth
e non-ideal coefficient and the location and effectiveness of the\nwind lu
nching. This process is particularly important for planet\nformation as it
gives us information on the area/mass ratio of the\ngrains that form at t
he disk midplane\, which are the fundamental\nbricks for planet formation.
\n
DTSTART:20210226T170000Z
DTEND:20210226T183000Z
LAST-MODIFIED:20210222T131430Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-3
END:VEVENT
BEGIN:VEVENT
UID:9e115488-9e73-44cb-a586-50354b9155ca
DTSTAMP:20210308T215705Z
CREATED:20210216T143817Z
DESCRIPTION:Topic: Plasma Turbulence in the Solar Wind\n\nSpeakers: Benjami
n Chandran\n\nAffiliation: University of New Hampshire\n\nConvective motio
ns on the solar surface launch Alfven waves that\npropagate out into the i
nterplanetary medium. On their way\, the waves\nbecome turbulent\, and the
ir energy cascades from large wavelengths to\nsmall wavelengths. At suffic
iently small wavelengths\, the fluctuations\ndissipate\, heating the backg
round plasma. This flow of energy from\nconvective motions to individual p
articles in the solar-wind plasma is\nlikely the key to the origin of the
solar wind\, one of the\nlong-standing problems in heliospheric physics. I
n this talk\, I will\ndescribe recent research on the different stages of
this energy flow:\nthe way that fluctuations evolve as they propagate out
from the Sun\,\nthe different physical processes that govern the cascade o
f\nfluctuation energy to small scales\, and the dissipation of small-scale
\nfluctuations by stochastic ion heating. I will also discuss what the\nst
udy of solar-wind turbulence has taught us about the solar wind's\norigin
and fundamental plasma physics\, as well as what it might yet\nteach us ab
out other astrophysical outflows.\n
DTSTART:20210301T150000Z
DTEND:20210301T160000Z
LAST-MODIFIED:20210223T140748Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astrophysical Sciences Special Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astrophysical-scien
ces-special-seminar-1
END:VEVENT
BEGIN:VEVENT
UID:eace3f9a-e499-4d4c-ba05-f187937dd91a
DTSTAMP:20210308T215705Z
CREATED:20210114T141716Z
DESCRIPTION:Topic: Chemical Abundance Properties of M31's Inner Stellar Hal
o from Resolved Stellar Spectroscopy\n\nSpeakers: Ivanna Escala\n\nAffilia
tion: Carnegie Observatories\n\nEach week\, we hold a relatively informal
seminar/discussion series\nwith an emphasis on extra-galactic and large-sc
ale structure\nastrophysics.\n\nDuring Galread a leader/visitor presents a
recent paper to the\ndiscussion group. The PDF of the paper is projected
onto a large\nscreen\, and a guest explains the paper\, section by section
\, in greater\ndetail than may be explained within the text of the article
. To aid\nwith discussion\, only the article PDF is presented -- no\npower
point-style slides. Galread discussions are very friendly and\ninteractive
.\n
DTSTART:20210301T160000Z
DTEND:20210301T170000Z
LAST-MODIFIED:20210226T133756Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-2
END:VEVENT
BEGIN:VEVENT
UID:26a2dc3e-fa77-48c8-8a53-6434028f427a
DTSTAMP:20210308T215705Z
CREATED:20201102T134602Z
DESCRIPTION:Topic: Rainbow structures\, Latin squares & graph decomposition
s\n\nSpeakers: Benny Sudakov\n\nAffiliation: ETH Zürich\n\nA subgraph of
an edge-coloured graph is called rainbow if all its\nedges have distinct c
olours. The study of rainbow subgraphs goes\nback to the work of Euler on
Latin squares in the 18th century. \nSince then rainbow structures were t
he focus of extensive research and\nfound numerous applications in design
theory and graph\ndecompositions. In this talk we discuss how probabilisti
c reasoning\ncan be used to attack several old problems in this area\, lea
ding to\nsubstantial progress on several well-known conjectures of Ryser\,
\nBrouwer\, Ringel\, and Graham-Sloane.\n\nBased on joint works with Keeva
sh\, Montgomery\, Pokrovskiy and\nYepremian.\n
DTSTART:20210301T161500Z
DTEND:20210301T171500Z
LAST-MODIFIED:20210301T152330Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-476
END:VEVENT
BEGIN:VEVENT
UID:f791e4d7-6e11-45b7-aec0-cef70cc30b70
DTSTAMP:20210308T215705Z
CREATED:20210114T152129Z
DESCRIPTION:Topic: Inferring Migration Histories of Resonant Planets\n\nSpe
akers: Sam Hadden\n\nAffiliation: Harvard-Smithsonian Center for Astrophys
ics\n\nExoplanet observations have revealed numerous examples of systems\n
hosting planets residing in mean motion resonances. These dynamical\nconfi
gurations are usually assumed to be the product of past orbital\nmigration
due to interactions with a proto-planetary disk. Planets\nthat experience
smooth migration and eccentricity-damping forces due\nto a protoplanetary
disk should not only be captured into mean motion\nresonances but also en
d up in specific dynamical configurations within\nthe resonance (sometimes
referred to as apsidal co-rotation\nresonances). I will describe a method
to fit radial velocity data in\norder to test whether planetary systems r
eside in these special\nconfigurations and show how the results of these f
its can be used to\ndraw conclusions about the migration histories of reso
nant planets.\nThese results provide empirical constraints that can inform
theories\nof planet-disk interactions.\n
DTSTART:20210301T170000Z
DTEND:20210301T180000Z
LAST-MODIFIED:20210226T134747Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-0
END:VEVENT
BEGIN:VEVENT
UID:e40c1ed4-acef-4b8b-b54b-63948d2f9ab0
DTSTAMP:20210308T215705Z
CREATED:20210114T150242Z
DESCRIPTION:Topic: Information Content of Higher-Order Galaxy Correlation F
unctions\n\nSpeakers: Lado Samushia and Francisco Villaescusa-Navarro\n\nA
ffiliation: Kansas State and Princeton University\n\n
DTSTART:20210301T173000Z
DTEND:20210301T190000Z
LAST-MODIFIED:20210226T135240Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-4
END:VEVENT
BEGIN:VEVENT
UID:2a52629d-5dc7-4736-9087-8ea28ba4b727
DTSTAMP:20210308T215705Z
CREATED:20201209T231651Z
DESCRIPTION:Topic: The Value of Errors in Proofs\n\nSpeakers: Avi Wigderson
\n\nAffiliation: Herbert H. Maass Professor\, School of Mathematics\n\nA f
ew months ago\, a group of theoretical computer scientists posted a\npaper
on the Arxiv with the strange-looking title 'MIP* = RE'\,\nimpacting and
surprising not only complexity theory but also some\nareas of math and phy
sics. Specifically\, it resolved\, in the negative\,\nthe 'Connes' embeddi
ng conjecture' in the area of von-Neumann\nalgebras\, and the 'Tsirelson p
roblem' in quantum information theory.\nYou can find the paper here\n\nhtt
ps://arxiv.org/abs/2001.04383\n\nAs it happens\, both acronyms MIP* and RE
represent proof systems\, of a\nvery different nature. To explain them\,
we'll take a meandering\njourney through the classical and modern definiti
ons of proof. I hope\nto explain how the methodology of computational comp
lexity theory\,\nespecially modeling and classification (both problems and
proofs) by\nalgorithmic efficiency\, naturally leads to the generation of
new such\nnotions and results (and more acronyms\, like NP). A special fo
cus will\nbe on notions of proof which allow interaction\, randomness\, an
d\nerrors\, and their surprising power and magical properties.\n\nThe talk
will be non-technical\, and requires no special background.\n
DTSTART:20210301T190000Z
DTEND:20210301T200000Z
LAST-MODIFIED:20210301T152635Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-355
END:VEVENT
BEGIN:VEVENT
UID:c91e2835-4009-4074-9f9c-ea3080340308
DTSTAMP:20210308T215705Z
CREATED:20210105T212011Z
DESCRIPTION:Topic: Graph comparison\n\nSpeakers: Anton Petrunin\n\nAffiliat
ion: Pennsylvania State University\n\nI will survey results related to gra
ph comparison\; graph comparison is\na certain type of restriction on a me
tric spaces which is encoded by a\ngiven graph.\n
DTSTART:20210301T213000Z
DTEND:20210301T223000Z
LAST-MODIFIED:20210301T153001Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-138
END:VEVENT
BEGIN:VEVENT
UID:a1875683-8081-41f4-a7b2-056d77e0bfa7
DTSTAMP:20210308T215705Z
CREATED:20201105T142037Z
DESCRIPTION:Topic: Solving Laplacian Systems of Directed Graphs\n\nSpeakers
: John Peebles\n\nAffiliation: Member\, School of Mathematics\n\nThis talk
introduces a directed analog of the\nclassical Laplacian matrix and discu
sses algorithms for solving\ncertain problems related to them. Of particul
ar interest is that using\nsuch algorithms\, one can compute the stationar
y distribution of a\nMarkov chain to high accuracy with a number of arithm
etic operations\nclose to the number of possible transitions. The analogou
s problem in\nthe low space setting\, in contrast\, remains open.\n
DTSTART:20210302T153000Z
DTEND:20210302T173000Z
LAST-MODIFIED:20210302T133007Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-471
END:VEVENT
BEGIN:VEVENT
UID:596342a8-051a-461f-8920-c3fb7ebe1165
DTSTAMP:20210308T215705Z
CREATED:20210201T193112Z
DESCRIPTION:
DTSTART:20210302T160000Z
DTEND:20210302T170000Z
LAST-MODIFIED:20210209T135026Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-3
END:VEVENT
BEGIN:VEVENT
UID:c0f32b0a-b518-4d09-ad20-9d7b7a81a125
DTSTAMP:20210308T215705Z
CREATED:20210105T221719Z
DESCRIPTION:Topic: Shape theory and Stone ∞-topoi\n\nSpeakers: Jacob Lurie
\n\nAffiliation: Professor\, School of Mathematics\n\n
DTSTART:20210302T183000Z
DTEND:20210302T203000Z
LAST-MODIFIED:20210226T014539Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-17
END:VEVENT
BEGIN:VEVENT
UID:8a32d1bd-5125-4191-9ff2-177fa872e6d5
DTSTAMP:20210308T215705Z
CREATED:20210106T222039Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210302T200000Z
DTEND:20210302T220000Z
LAST-MODIFIED:20210226T180054Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-15
END:VEVENT
BEGIN:VEVENT
UID:4037aebc-412f-4d95-9aca-8c967951dd7b
DTSTAMP:20210308T215705Z
CREATED:20210105T233137Z
DESCRIPTION:Topic: Topological obstructions to matrix stability of discrete
groups\n\nSpeakers: Marius Dadarlat \n\nAffiliation: Purdue University\n
\nA discrete countable group is matricially stable if its finite\ndimensio
nal approximate unitary representations are perturbable to\ngenuine repres
entations in the point-norm topology. We aim to explain\nin accessible ter
ms why matricial stability for a group $G$ implies\nthe vanishing of the r
ational even cohomology of $G$ for large classes\nof groups\, including th
e linear groups.
DTSTART:20210303T160000Z
DTEND:20210303T171500Z
LAST-MODIFIED:20210303T134625Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-16
END:VEVENT
BEGIN:VEVENT
UID:8c56ffb5-4cad-405f-a782-0dad24440948
DTSTAMP:20210308T215705Z
CREATED:20210106T003012Z
DESCRIPTION:Topic: On two geometric realizations of the anti-spherical modu
le\n\nSpeakers: Tsao-Hsien Chen\n\nAffiliation: University of Minnesota\,
Twin Cities\; Member\, School of Mathematics\n\nThe anti-spherical modules
over the affine Hecke algebras admit two\ndifferent realizations: one rea
lization is in terms of the space of\nWhittaker functions on the affine fl
ag manifolds and the other\nrealization\, due to Kazhdan-Lusztig\, is in t
erms of the equivariant\nK-theory of the Springer resolution of the nilpot
ent cone for the dual\ngroup. I will explain the work of Arkhipov-Bezrukav
nikov on the\nequivalence between the Iwahoric-Whittaker category and the
\nequivariant derived category for the Springer resolution\, which\nprovid
es a geometric lift (or categorification) of the above two\nrealizations o
f the anti-spherical modules.\n
DTSTART:20210303T200000Z
DTEND:20210303T220000Z
LAST-MODIFIED:20210226T014930Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-20
END:VEVENT
BEGIN:VEVENT
UID:c4e3e5dc-11b8-4a54-84c0-0f5b159f9902
DTSTAMP:20210308T215705Z
CREATED:20210106T004835Z
DESCRIPTION:Topic: Newton\, Euler\, Navier\, and Green\n\nSpeakers: Susan F
riedlander\n\nAffiliation: University of Southern California\; Member\, Sc
hool of Mathematics\n\nWe touch lightly on the background of four mathemat
icians over four\ncenturies whose names are famous in mathematics with my
personal\nemphasis on fluid dynamics.\n
DTSTART:20210303T223000Z
DTEND:20210304T000000Z
LAST-MODIFIED:20210226T015058Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-202
END:VEVENT
BEGIN:VEVENT
UID:92ef57cc-771c-4c90-a057-0e4a80feb9f3
DTSTAMP:20210308T215705Z
CREATED:20201210T013117Z
DESCRIPTION:
DTSTART:20210304T150000Z
DTEND:20210304T170000Z
LAST-MODIFIED:20210106T042026Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-19
END:VEVENT
BEGIN:VEVENT
UID:61a4bd2c-8e33-45d8-ba05-0f5fb5566898
DTSTAMP:20210308T215705Z
CREATED:20210113T164022Z
DESCRIPTION:Topic: Cosmology and more\, from ACT\n\nSpeakers: Jo Dunkley\n
\nAffiliation: Institute for Advanced Study/Princeton University\n\nI will
talk about our latest data from the Atacama Cosmology\nTelescope\, a proj
ect measuring millimeter emission over half the sky.\nI will give a flavor
of the cosmology we are interested in testing via\na new view of the Cosm
ic Microwave Background. I will also show how we\nare probing the baryon d
istribution and clusters via the SZ effects.\nI’ll also talk about prospec
ts for millimeter science - including\nextragalactic sources and the first
transients from ACT.\n
DTSTART:20210304T160000Z
DTEND:20210304T170000Z
LAST-MODIFIED:20210302T134357Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-5
END:VEVENT
BEGIN:VEVENT
UID:1311b7e9-8eb0-4f96-b06f-ece32da8ea32
DTSTAMP:20210308T215705Z
CREATED:20210107T004946Z
DESCRIPTION:Topic: Braid group actions and PBW type basis\n\nSpeakers: Cald
er Morton-Ferguson\n\nAffiliation: Massachusetts Institute of Technology\n
\nCovers chapter 8 in Jantzen's book.\n
DTSTART:20210304T210000Z
DTEND:20210304T230000Z
LAST-MODIFIED:20210304T205605Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-5
END:VEVENT
BEGIN:VEVENT
UID:7b77d27c-2505-4724-a3a9-ed454f7b15fa
DTSTAMP:20210308T215705Z
CREATED:20210106T011108Z
DESCRIPTION:Topic: Monoidal Structures on GL(2)-Modules and Abstractly Auto
morphic Representations\n\nSpeakers: Gal Dor\n\nAffiliation: Tel Aviv Univ
ersity\n\nConsider the function field F of a smooth curve over $F_q$\, wit
h $q >\n2$.\n\nL-functions of automorphic representations of $GL(2)$ over
$F$ are\nimportant objects for studying the arithmetic properties of the f
ield\n$F$. Unfortunately\, they can be defined in two different ways: one
by\nGodement-Jacquet\, and one by Jacquet-Langlands. Classically\, one sho
ws\nthat the resulting L-functions coincide using a complicated\ncomputati
on.\n\nEach of these L-functions is the GCD of a family of zeta integrals
\nassociated to test data. I will categorify the question\, by showing\nth
at there is a correspondence between the two families of zeta\nintegrals\,
instead of just their L-functions. The resulting comparison\nof test data
will induce an exotic symmetric monoidal structure on the\ncategory of re
presentations of $GL(2)$.\n\nIt turns out that an appropriate space of aut
omorphic functions is a\ncommutative algebra with respect to this symmetri
c monoidal structure.\nI will outline this construction\, and show how it
can be used to\nconstruct a category of automorphic representations.\n
DTSTART:20210304T213000Z
DTEND:20210304T223000Z
LAST-MODIFIED:20210304T205732Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-441
END:VEVENT
BEGIN:VEVENT
UID:279f125f-69b1-46b0-8722-27cc84b94f9a
DTSTAMP:20210308T215705Z
CREATED:20210106T021931Z
DESCRIPTION:Topic: Periodic Floer homology and the large-scale geometry of
Hofer's metric on the sphere\n\nSpeakers: Sobhan Seyfaddini\n\nAffiliation
: Institut de mathématiques de Jussieu - Paris Rive Gauche\n\nThe group of
Hamiltonian diffeomorphisms of a symplectic manifold\nadmits a remarkable
bi-invariant metric\, called Hofer’s metric. My\ntalk will be about a rec
ent joint work with Dan Cristofaro-Gardiner\nand Vincent Humilière resolvi
ng the following two open-questions\nrelated to the large-scale geometry o
f this metric. The first\, due to\nKapovich and Polterovich\, asks whether
the two-sphere\, equipped with\nHofer’s metric\, is quasi-isometric to th
e real line\; we show that it\nis not. The second\, due to Fathi\, asks wh
ether the group of area and\norientation preserving homeomorphisms of the
two-sphere is a simple\ngroup\; we show that it is not. Key to our proofs
is a new sequence of\nspectral invariants defined via Hutchings’ Periodic
Floer Homology.\n
DTSTART:20210305T141500Z
DTEND:20210305T154500Z
LAST-MODIFIED:20210305T142252Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-61
END:VEVENT
BEGIN:VEVENT
UID:a945c788-4534-486b-990d-2bc6b98153d9
DTSTAMP:20210308T215705Z
CREATED:20201102T201706Z
DESCRIPTION:Topic: From superconductors to Coulomb gases: crystallization
questions\n\nSpeakers: Sylvia Serfaty\n\nAffiliation: New York University
\n\nThe physicist Abrikosov predicted that in certain superconductors\,\no
ne should observe triangular lattices of vortices\, now called\nAbrikosov
lattices. When studying ground states of Coulomb gases\,\nwhich is motiva
ted by questions in approximation theory\, random\nmatrix theory and stati
stical physics\, one also expects the same\nlattices to appear. This crys
tallization phenomenon turns out to be\nrelated to the Cohn-Kumar conjectu
re about the universal minimality of\ncertain special lattices in dimensio
ns 2\, 8 and 24 and recently solved\nin dimensions 8 and 24. \n
DTSTART:20210305T190000Z
DTEND:20210305T200000Z
LAST-MODIFIED:20210305T162826Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Ruth and Irving Adler Expository Lecture in Mathematics
URL:https://www.ias.edu/math/events/ruth-and-irving-adler-expository-lectur
e-mathematics
END:VEVENT
BEGIN:VEVENT
UID:bab285e1-2f4f-4c51-96b3-e756e7ec3a06
DTSTAMP:20210308T215705Z
CREATED:20210226T010742Z
DESCRIPTION:Topic: Persistent matchmaking\n\nSpeakers: Uli Bauer\n\nAffilia
tion: Technical University of Munich\n\nIn this talk\, I will give an over
view of some recent results motivated\nby the computation and applications
of persistent homology\, a theory\nthat creates a bridge between the cont
inuous world of topology and the\ndiscrete world of data\, and assigns sta
ble and structurally simple\ninvariants to geometric point sets\, parametr
ized over geometric scale.\n\nIn particular\, I will explore why cohomolog
y is so much more efficient\nin such computations and how it can also be e
mployed to efficiently\ncompute the induced matchings that exhibit the sta
bility of\npersistence diagrams.\n\nI will also shed some light on why thi
ngs are much more complicated\nwhen a second parameter enters the game.\n
\nFinally\, I will explain and how the goal of finding the perfect\npartne
r also helps with cohomology computation at a large scale\,\ninvolving 68
trillions of simplices.\n
DTSTART:20210305T190000Z
DTEND:20210305T200000Z
LAST-MODIFIED:20210305T162545Z
LOCATION:Remote Access
SUMMARY:Workshop on Topology: Identifying Order in Complex Systems
URL:https://www.ias.edu/math/events/workshop-topology-identifying-order-com
plex-systems-131
END:VEVENT
BEGIN:VEVENT
UID:7d76a6c2-6ae3-4f60-b473-b2b0f743c046
DTSTAMP:20210308T215705Z
CREATED:20210115T162820Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210305T200000Z
DTEND:20210305T210000Z
LAST-MODIFIED:20210226T150640Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-5
END:VEVENT
BEGIN:VEVENT
UID:86c86600-e2c9-4d98-976c-220bcaf39d8f
DTSTAMP:20210308T215705Z
CREATED:20210114T142558Z
DESCRIPTION:Topic: The Empirical Dust Attenuation Framework — Taking Hydrod
ynamical Simulations with a Grain of Dust\n\nSpeakers: Chang Hoon Hahn\n\n
Affiliation: Princeton University\n\nEach week\, we hold a relatively info
rmal seminar/discussion series\nwith an emphasis on extra-galactic and lar
ge-scale structure\nastrophysics.\n\nDuring Galread a leader/visitor prese
nts a recent paper to the\ndiscussion group. The PDF of the paper is proje
cted onto a large\nscreen\, and a guest explains the paper\, section by se
ction\, in greater\ndetail than may be explained within the text of the ar
ticle. To aid\nwith discussion\, only the article PDF is presented -- no\n
powerpoint-style slides. Galread discussions are very friendly and\nintera
ctive.\n
DTSTART:20210308T160000Z
DTEND:20210308T170000Z
LAST-MODIFIED:20210305T211508Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-6
END:VEVENT
BEGIN:VEVENT
UID:f1ae73a1-01d9-4e7d-9e8a-b08c258d5579
DTSTAMP:20210308T215705Z
CREATED:20201102T134915Z
DESCRIPTION:Topic: Strong refutation of semi-random Boolean CSPs\n\nSpeaker
s: Venkatesan Guruswami\n\nAffiliation: Carnegie Mellon University\n\nFor
a fixed integer k > 1\, the Boolean k-XOR problem consists of a\nsystem of
linear equations mod 2 with each equation involving exactly\nk variables.
We give an algorithm to strongly refute *semi-random*\ninstances of the B
oolean k-XOR problem on n variables that have\nn^{k/2} poly(log n) equatio
ns. (In a semi-random k-XOR instance\, the\nequations can be arbitrary and
only the right-hand sides are random.)\nVia known reductions\, this yield
s an efficient strong refutation\nalgorithm for semi-random instances of a
ll Boolean constraint\nsatisfaction problems. The number of constraints re
quired by our\nalgorithm matches\, up to polylogarithmic factors\, the bes
t-known\nbounds for efficient refutation of fully random instances.\n\nWhe
n k is even\, refutation of k-XOR follows via a natural flattening\nto a 2
-XOR instance on n^{k/2} variables. Such a straightforward\napproach is\,
however\, not available for odd k. The fully random case\nof k-XOR for odd
k was refuted in prior work via spectral methods\nemploying intricate tra
ce-moment computations. We first give a simpler\nproof for the purely rand
om case relying only on an off-the-shelf\nmatrix Bernstein inequality. Spr
ingboarding off the random case\, we\nidentify a combinatorial property of
random k-XOR instances that makes\nspectral refutation work\, and solve t
he semi-random case by reduction\nto a collection of 2-XOR instances and e
mploying spectral upper bounds\nthat utilize the Booleanity of the assignm
ent.\n\nJoint work with Jackson Abascal and Pravesh Kothari.\n
DTSTART:20210308T161500Z
DTEND:20210308T171500Z
LAST-MODIFIED:20210308T182426Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-477
END:VEVENT
BEGIN:VEVENT
UID:87a5dd6f-2138-472f-9ede-788713a124d6
DTSTAMP:20210308T215705Z
CREATED:20210114T152208Z
DESCRIPTION:Topic: Solar System dynamics in deep time as expressed by the N
ewark Supergroup\n\nSpeakers: Greg Laughlin\n\nAffiliation: Yale Universit
y\n\nSignificant areas of bedrock in the areas surrounding both Yale\nUniv
ersity in Connecticut (the New Haven and East Berlin Formations)\nand also
Princeton University in New Jersey (the Lockatong formation)\nbelong to t
he “Newark Supergroup” which consists of sedimentary\nstrata (and igneous
sills) deposited between ~240 and ~190 Mya during\nthe late Triassic and e
arly Jurassic periods\, when the local\nenvironment of our Ivy League Inst
itutions was a tropical/subtropical\nlandscape of rift basins and lakes as
sociated with the breakup of\nPangea. The late University of Michigan Astr
onomer Dean B. McLaughlin\n(famed for co-discovery of the Rossiter-McLaugh
lin effect that permits\nmeasurement of projected stellar spin -- planetar
y orbit\nmisalignments) presents an interesting connection to the study of
\nthese rocks. In his spare time\, McLaughlin 'doubled as one of the\nfine
st physical stratigraphers to work in the Newark Supergroup'\n(Olsen 1988)
. He mapped the cyclical patterns that occur in the local\nNew Jersey outc
rops\, which\, through the later work of Paul Olsen and\nothers have been
cleanly tied to both precessional and orbital cycles\nfor Earth. In this i
nformal talk I will discuss entirely in progress\nwork that explores the p
ossibility of using this remarkable\nstratigraphic record to probe the lar
ge-scale eccentricity and\ninclination dynamics of the Solar System\, with
a particular focus on\nputting new limits on dynamical perturbers that ma
y have passed\nthrough from interstellar space during the last quarter bil
lion years.\n\nReference: Olsen\, P. E.\, 1988\, Continuity of strata in t
he Newark and\nHartford Basins of the Newark Supergroup: U.S. Geological S
urvey\nBulletin\, 1776\,6-18.\n
DTSTART:20210308T170000Z
DTEND:20210308T180000Z
LAST-MODIFIED:20210305T141107Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-1
END:VEVENT
BEGIN:VEVENT
UID:fd74d48a-84ae-418f-acaa-384c0f9ba6e3
DTSTAMP:20210308T215705Z
CREATED:20210114T150310Z
DESCRIPTION:Topic: Constraining the nature of dark matter with stellar stre
ams in the Milky Way\n\nSpeakers: Jo Bovy\n\nAffiliation: University of To
ronto\n\nStellar tidal streams originating from disrupting globular cluste
rs in\nthe Milky Way’s halo hold enormous promise as probes of both the\nl
arge-scale structure of the Milky Way halo’s density distribution\nand its
small-scale structure. As such\, the observed density\, spatial\,\nand ki
nematic structure of stellar streams can provide important new\nconstraint
s on the interactions and small-scale structure of dark\nmatter. I will di
scuss recent progress on modeling the dynamics of\nstream formation and it
s application to fitting observed stellar\nstream data from photometric\,
spectroscopic\, and astrometric\nobservations. I will in particular focus
on how the most recent\nphotometric and astrometric data (from Gaia) helps
us map the\nsmall-scale structure of streams and how this lets us answer
the\nfundamental question: Is dark matter cold?\n
DTSTART:20210308T173000Z
DTEND:20210308T190000Z
LAST-MODIFIED:20210304T172047Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-5
END:VEVENT
BEGIN:VEVENT
UID:b54894e5-8cc5-4555-943b-c485229c0450
DTSTAMP:20210308T215705Z
CREATED:20201209T231703Z
DESCRIPTION:Topic: Higher Representation Theory\n\nSpeakers: Raphaël Rouqui
er\n\nAffiliation: University of California\, Los Angeles\; Member\, Schoo
l of Mathematics\n\nNew types of symmetries have been considered in algebr
a and algebraic\ngeometry and a higher analog of representation theory has
been\ndeveloped to answer questions of classical representation theory.\n
Geometric representation theory can be viewed as\nrepresentation-theoretic
geometry. These new structures are related to\n4-dimensional topology and
are expected to be related to quantum field\ntheories.\n
DTSTART:20210308T190000Z
DTEND:20210308T200000Z
LAST-MODIFIED:20210308T182715Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-350
END:VEVENT
BEGIN:VEVENT
UID:5a5bd371-5c33-40a7-b8f5-de7145326d5f
DTSTAMP:20210308T215705Z
CREATED:20210105T212027Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210308T213000Z
DTEND:20210308T223000Z
LAST-MODIFIED:20210305T171030Z
LOCATION:
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-139
END:VEVENT
BEGIN:VEVENT
UID:235219c2-cdf0-4cb7-b959-65f6ad0a688d
DTSTAMP:20210308T215705Z
CREATED:20201105T142117Z
DESCRIPTION:Topic: Random k-out subgraphs\n\nSpeakers: Or Zamir\n\nAffiliat
ion: Member\, School of Mathematics\n\nRandom sampling a subgraph of a gra
ph is an important algorithmic\ntechnique. Solving some problems on the (
smaller) subgraph is\nnaturally faster\, and can give either a useful appr
oximate answer\, or\nsometimes even give a result that can be quickly modi
fied to an exact\nsolution\, on the original graph.\n\nWe study the follow
ing simple sampling model and question about it: \n\nEach vertex of an ar
bitrary simple graph on n vertices chooses k\nrandom incident edges. \n\n
What is the expected number of edges in the original graph that\nconnect d
ifferent connected components of the sampled subgraph?\n\nWe prove that th
e answer is O(n/k)\, when k ≥ c log n\, for some large\nenough c. We con
jecture that the same holds for smaller values of\nk\, possibly for any k
≥ 2. Such a result is best possible for any k\n≥ 2.\n\nAs an application\,
we use this sampling result to obtain a one-way\ncommunication protocol w
ith private randomness for finding a spanning\nforest of a graph in which
each vertex sends only O( \sqrt(n) log n)\nbits to a referee. \n\nBased o
n joint work with Jacob Holm\, Valeria King\, Mikkel Thorup and\nUri Zwick
.\n
DTSTART:20210309T153000Z
DTEND:20210309T173000Z
LAST-MODIFIED:20210305T163656Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-472
END:VEVENT
BEGIN:VEVENT
UID:a3f6f0dd-0a6e-4bc4-81cb-87193bc1f169
DTSTAMP:20210308T215705Z
CREATED:20210105T221737Z
DESCRIPTION:Topic: Oriented pushouts and oriented fibre products\n\nSpeaker
s: Keyao Peng\n\nAffiliation: Institut Fourier Grenoble Alpes\n\n
DTSTART:20210309T183000Z
DTEND:20210309T203000Z
LAST-MODIFIED:20210305T171343Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-18
END:VEVENT
BEGIN:VEVENT
UID:e0bea200-a8c1-4dde-a61b-d1eb29854da3
DTSTAMP:20210308T215705Z
CREATED:20210106T222053Z
DESCRIPTION:Topic: A friendly introduction to microlocal sheaves\n\nSpeaker
s: Michael McBreen\n\nAffiliation: Chinese University of Hong Kong\n\nWe w
ill study the singularities of sheaves on a manifold via the\nsymplectic g
eometry of its cotangent bundle\, following the work of\nSato\, Kashiwara\
, Schapira and others. We will then see how to organise\nthis information
into a sheaf of categories over the cotangent bundle\,\nand discuss some s
imple examples.\n
DTSTART:20210309T220000Z
DTEND:20210310T000000Z
LAST-MODIFIED:20210308T203701Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-16
END:VEVENT
BEGIN:VEVENT
UID:02d15fb1-c136-4852-9550-884c28b2f6f1
DTSTAMP:20210308T215705Z
CREATED:20210114T163210Z
DESCRIPTION:Topic: The Royal Road: Eclipses and Transits in the Era of Gaia
and TESS\n\nSpeakers: Keivan Stassun\n\nAffiliation: Vanderbilt Universit
y\n\nIn 1992\, the first exoplanets were discovered by measuring the sligh
t\ntiming variations in rotating pulsars. Since then\, we’ve pointed\nincr
easingly sophisticated ground- and space-based instruments at more\nnormal
stars\, hoping to image their planets directly\, or to see the\nstars bli
nk\, wobble\, or lens in ways that reveal orbiting companions.\nThe curren
t tally of exoplanets tops out at about 4\,400-and very much\nstill counti
ng. Out of the many hot Jupiters and mini Neptunes we’ve\nalso spotted roc
ky planets\, a few mirroring Earth in size\, density\,\nand habitability.
Prof. Stassun will discuss the ways in which\neclipses and transits of sta
rs by their companions – utilizing light\ncurves from the NASA TESS missio
n and parallaxes from the Gaia\nsatellite – can be used to determine the f
undamental properties of\nstars and characteristics of their planets by th
e thousands\, and with\na precision never before possible.\n
DTSTART:20210310T003000Z
DTEND:20210310T023000Z
LAST-MODIFIED:20210305T142303Z
LOCATION:Virtual Meeting
SUMMARY:Amateur Astronomers Association of Princeton (AAAP) Monthly Meeting
URL:https://www.ias.edu/sns/events/amateur-astronomers-association-princeto
n-aaap-monthly-meeting-3
END:VEVENT
BEGIN:VEVENT
UID:aca009e5-7ecf-445a-9c77-3ea3f4c130c2
DTSTAMP:20210308T215705Z
CREATED:20210105T233155Z
DESCRIPTION:Topic: Constraint metric approximation and constraint stability
\n\nSpeakers: Liviu Paunescu\n\nAffiliation: Romanian Academy\n\nConstrain
t metric approximation is about constructing an approximation\nof a group
$G$\, when the approximation is already given for a subgroup\n$H$. Similar
ly\, constraint stability is about lifting a representation\nof a group $G
$\, when the lift is already provided for a subgroup $H$.\nJoint work with
Goulnara Arzhantseva.
DTSTART:20210310T160000Z
DTEND:20210310T171500Z
LAST-MODIFIED:20210210T004812Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-17
END:VEVENT
BEGIN:VEVENT
UID:1e5edda4-9d56-4f67-b3e7-2bc8ea5ec3f5
DTSTAMP:20210308T215705Z
CREATED:20210115T153030Z
DESCRIPTION:Topic: Multi-phase ISM structure\, stellar clustering\, and out
flows with supernoavae\, stellar winds\, radiation\, and cosmic rays\n\nS
peakers: Tim-Eric Rathjen\n\nAffiliation: Max Planck Institute for Astroph
ysics\, Garching\n\nI present simulations of the multi-phase interstellar
medium (ISM) at\nsolar neighbourhood conditions including thermal and non-
thermal ISM\nprocesses\, star cluster formation\, and feedback from massiv
e stars:\nstellar winds\, hydrogen ionising radiation\, supernovae (SN)\,
and the\ninjection of cosmic rays (CR). On the short\, 100 Myr\, timescale
s\ninvestigated here\, CRs only have a moderate impact on star formation\n
and the multi-phase gas structure and result in cooler outflows\, if\npres
ent. My models indicate that at low gas surface densities SN-only\nfeedbac
k only captures some characteristics of the star forming ISM\nand outflows
/inflows relevant for regulating star formation. Instead\,\nstar formation
is regulated on star cluster scales by radiation and\nwinds from massive
stars in clusters\, whose peak masses agree with\nsolar neighbourhood esti
mates.\n
DTSTART:20210310T160000Z
DTEND:20210310T170000Z
LAST-MODIFIED:20210308T135026Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Star Formation/ISM Rendezvous (SFIR)
URL:https://www.ias.edu/sns/events/princeton-university-star-formationism-r
endezvous-sfir-4
END:VEVENT
BEGIN:VEVENT
UID:71c631c4-35a8-4ea6-a45d-a65ccf320506
DTSTAMP:20210308T215705Z
CREATED:20210106T003029Z
DESCRIPTION:Topic: Two Geometric Realizations of the Affine Hecke Algebra I
\n\nSpeakers: Pablo Boixeda Alvarez\n\nAffiliation: Member\, School of Mat
hematics\n\nIn this talk we will begin the discussion of the results in\nB
ezrukavnikov's 'On Two Geometric Realizations of the Affine Hecke\nalgebra
'. We will put all the previous tools described in this series\nof talks t
ogether to construct the equivalence of monoidal categories\ncategorifying
the realization of the affine Hecke algebra as the\nK-ring of the Steinbe
rg variety.\n
DTSTART:20210310T200000Z
DTEND:20210310T220000Z
LAST-MODIFIED:20210305T172727Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-21
END:VEVENT
BEGIN:VEVENT
UID:afd0592b-38c6-4611-8aec-ddffb475f9e0
DTSTAMP:20210308T215705Z
CREATED:20210308T143327Z
DESCRIPTION:Topic: What's on the horizon? A discussion on the scientific pr
ospects of the next-generation Event Horizon Telescope\n\nThe Event Horizo
n Telescope (EHT) has produced the first image of a\nblack hole for M87\,
opening the possibility to test general\nrelativity and our understanding
of black hole accretion and\nhigh-energy plasma physics. \n\nAs the commun
ity is preparing to take the next steps\, we want to\ndiscuss current chal
lenges and future prospects of EHT related\nscience.\n\nThis informal disc
ussion session will be moderated by Andrew Chael\,\nAlex Lupsasca\, Lia Me
deiros\, Eliot Quataert\, and Chris White. \n
DTSTART:20210310T200000Z
DTEND:20210310T210000Z
LAST-MODIFIED:20210308T151115Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative - Special Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
special-seminar-0
END:VEVENT
BEGIN:VEVENT
UID:d3f55314-d73e-4474-8edd-409fbdb0df9b
DTSTAMP:20210308T215705Z
CREATED:20210106T004852Z
DESCRIPTION:Topic: Many interacting quantum particles: open problems\, and
a new point of view on an old problem\n\nSpeakers: Ian Jauslin\n\nAffiliat
ion: Princeton University\n\nThe main object of interest in this talk will
be a system of many\nparticles\, modeled using the prescriptions of quant
um mechanics. A\nsignificant challenge to studying such systems is that pa
rticles\ninteract with each other\, via weak or strong\, attractive or rep
ulsive\nforces\, which induce correlations\, and make it so that\, to unde
rstand\nthe properties of the system\, one must understand the behavior of
all\nparticles at once. In this talk\, I will consider one of the simples
t\ninteracting quantum systems\, called the 'Bose gas'\, and I will review
\nwhat is known\, and discuss a collection of open questions. Finally\, I
\nwill discuss an approach to this model\, which may seem odd at first\ngl
ance\, but which seems to be very successful to understand the\nproperties
of the interacting Bose gas in a way that is conceptually\nand computatio
nally simple.\n
DTSTART:20210310T223000Z
DTEND:20210311T000000Z
LAST-MODIFIED:20210308T155855Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-203
END:VEVENT
BEGIN:VEVENT
UID:3e2d19ba-a8e9-490c-ba5e-5a7664be60c0
DTSTAMP:20210308T215705Z
CREATED:20201210T013130Z
DESCRIPTION:
DTSTART:20210311T150000Z
DTEND:20210311T170000Z
LAST-MODIFIED:20210106T042125Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-20
END:VEVENT
BEGIN:VEVENT
UID:9b0ff6a1-6592-442b-9790-13bba4a8795b
DTSTAMP:20210308T215705Z
CREATED:20210113T164614Z
DESCRIPTION:Topic: Stellar clustering connecting the formation and evolutio
n of galaxies to the formation and evolution of us\n\nSpeakers: Diederik K
ruijssen\n\nAffiliation: University of Heidelberg\n\nThe clustered nature
of star formation leaves a long-term imprint on\ngalaxies\, stars\, and pl
anets. At young ages\, stellar clustering\nsubdivides galaxies into indivi
dual building blocks undergoing\nvigorous\, feedback-driven life cycles th
at vary with the galactic\nenvironment. These units structure the interste
llar medium spatially\,\ndynamically and chemically\, and collectively def
ine how galaxies form\nstars. At old ages\, the relics of clustered star f
ormation persist as\nancient globular clusters\, which hold a wealth of in
formation allowing\nus to reconstruct the assembly histories of galaxies\,
culminating in\nthe reconstruction of the Milky Way’s merger tree. Toward
s smaller\nscales\, stellar clustering has a measurable impact on the evol
ution of\nprotoplanetary discs\, the architectures of planetary systems\,
and the\nproperties of planets themselves. I will discuss how this web of
\nphysical processes across a hierarchy of scales defines the cosmic\necos
ystem that we live in\, and demonstrate that stellar clustering is\nat its
focal point.\n
DTSTART:20210311T160000Z
DTEND:20210311T170000Z
LAST-MODIFIED:20210114T140155Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-16
END:VEVENT
BEGIN:VEVENT
UID:3c5f10b3-4e02-4054-8ce5-9004d631415e
DTSTAMP:20210308T215705Z
CREATED:20210107T005002Z
DESCRIPTION:Topic: Continuation from last time\n\nSpeakers: Calder Morton-F
erguson\n\nAffiliation: Massachusetts Institute of Technology\n\n
DTSTART:20210311T210000Z
DTEND:20210311T230000Z
LAST-MODIFIED:20210305T173120Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-6
END:VEVENT
BEGIN:VEVENT
UID:7962b18e-e660-4b5b-b909-bc99559643d1
DTSTAMP:20210308T215705Z
CREATED:20210106T011125Z
DESCRIPTION:Topic: Some remarks on Landau--Siegel zeros\n\nSpeakers: Alexan
dru Zaharescu\n\nAffiliation: University of Illinois at Urbana–Champaign\n
\n
DTSTART:20210311T213000Z
DTEND:20210311T223000Z
LAST-MODIFIED:20210305T173326Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-442
END:VEVENT
BEGIN:VEVENT
UID:12124dec-a367-4dfd-b29e-d20d359bbfb5
DTSTAMP:20210308T215705Z
CREATED:20210106T021948Z
DESCRIPTION:Topic: Inverting primes in Weinstein geometry\n\nSpeakers: Oleg
Lazarev\n\nAffiliation: Harvard University\n\nA classical construction in
topology associates to a space $X$ and\nprime $p$\, a new 'localized' spa
ce $X_p$ whose homotopy and homology\ngroups are obtained from those of $X
$ by inverting $p$. In this talk\,\nI will discuss a symplectic analog of
this construction\, extending\nwork of Abouzaid-Seidel and Cieliebak-Elias
hberg on flexible Weinstein\nstructures. Concretely\, I will produce prime
-localized Weinstein\nsubdomains of high-dimensional Weinstein domains and
also show that\nany Weinstein subdomain of a cotangent bundle agrees\nFuk
aya-categorically with one of these special subdomains. The key\nwill be t
o classify which objects of the Fukaya category of $T^{\ast}\nM$ – twisted
complexes of Lagrangians – are quasi-isomorphic to\nactual Lagrangians. T
his talk is based on joint work with Z. Sylvan.\n
DTSTART:20210312T141500Z
DTEND:20210312T154500Z
LAST-MODIFIED:20210305T173744Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-62
END:VEVENT
BEGIN:VEVENT
UID:63618409-aab0-4fff-ac90-0827e929b491
DTSTAMP:20210308T215705Z
CREATED:20210114T142753Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Shmuel Bialy\n\nAffiliation: Harvard Cf
A\n\nEach week\, we hold a relatively informal seminar/discussion series\n
with an emphasis on extra-galactic and large-scale structure\nastrophysics
.\n\nDuring Galread a leader/visitor presents a recent paper to the\ndiscu
ssion group. The PDF of the paper is projected onto a large\nscreen\, and
a guest explains the paper\, section by section\, in greater\ndetail than
may be explained within the text of the article. To aid\nwith discussion\,
only the article PDF is presented -- no\npowerpoint-style slides. Galread
discussions are very friendly and\ninteractive.\n
DTSTART:20210315T150000Z
DTEND:20210315T160000Z
LAST-MODIFIED:20210114T142843Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-7
END:VEVENT
BEGIN:VEVENT
UID:36f19af2-e0c5-419c-b6dd-04dbd8a6ed0b
DTSTAMP:20210308T215705Z
CREATED:20201211T181634Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Noga Ron-Zewi\n\nAffiliation: Haifa Uni
versity\n\n
DTSTART:20210315T151500Z
DTEND:20210315T161500Z
LAST-MODIFIED:20210208T130311Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-478
END:VEVENT
BEGIN:VEVENT
UID:1c3c3980-15fe-4b80-8161-4d35989f04f3
DTSTAMP:20210308T215705Z
CREATED:20210114T152236Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210315T160000Z
DTEND:20210315T170000Z
LAST-MODIFIED:20210219T153559Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-2
END:VEVENT
BEGIN:VEVENT
UID:5bf4838a-803a-40c7-b8da-2279891a3bde
DTSTAMP:20210308T215705Z
CREATED:20210114T150341Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210315T163000Z
DTEND:20210315T180000Z
LAST-MODIFIED:20210210T170526Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-6
END:VEVENT
BEGIN:VEVENT
UID:b25b0194-8238-4c30-9196-020f76c614d3
DTSTAMP:20210308T215705Z
CREATED:20201209T231716Z
DESCRIPTION:Topic: Estimating the mean of a real valued distribution\n\nSpe
akers: Paul Valiant\n\nAffiliation: Brown University\; von Neumann Fellow\
, School of Mathematics\n\nI revisit the basic statistical problem of esti
mating the mean of a\nreal-valued distribution. I will introduce an estima
tor with the\nguarantee that 'our estimator\, on *any* distribution\, is a
s accurate\nas the sample mean is for the Gaussian distribution of matchin
g\nvariance.' Crucially\, in contrast to prior works\, our estimator does
\nnot require prior knowledge of the variance\, and works across the\nenti
re gamut of distributions with finite variance\, including those\nwithout
any higher moments. Parameterized by the sample size $n$\, the\nfailure pr
obability $\delta$\, and the variance $\sigma^2$\, our\nestimator is accur
ate to within\n$\sigma\cdot(1+o(1))\sqrt{\frac{2\log\frac{1}{\delta}}{n}}$
\, which is\ntight up to the $1+o(1)$ factor. I will contrast these result
s with\nongoing efforts to adapt these techniques to higher dimensions.\n
\nBased on joint work with Jasper Lee - https://arxiv.org/abs/2011.08384\n
DTSTART:20210315T180000Z
DTEND:20210315T190000Z
LAST-MODIFIED:20210201T153401Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-356
END:VEVENT
BEGIN:VEVENT
UID:43213446-89c2-4c69-8e68-f7f17fe3c9de
DTSTAMP:20210308T215705Z
CREATED:20210105T212043Z
DESCRIPTION:Topic: The dissipation properties of transport noise\n\nSpeaker
s: Franco Flandoli\n\nAffiliation: Scuola Normale Superiore di Pisa\n\nIn
2017 Lucio Galeati understood that a suitable scaling limit of\ncertain hy
perbolic PDEs with noise may lead to deterministic parabolic\nequations. S
ince then\, in collaboration with Lucio and Dejun Luo\, we\nhave understoo
d the phenomenon from several viewpoints and for\ndifferent models. Among
the consequences there is mixing\, enhanced\ndissipation\, delayed blow-up
due to noise for several classes of\nequations including Euler and Navier
-Stokes equations\, Keller-Siegel\nand reaction diffusion equations\; and
also rigorous results on eddy\nviscosity and eddy dissipation in turbulent
fluids have been proved.\nAlong with arguments of stochastic model reduct
ion\, developed with\nUmberto Pappalettera\, a picture arises of the poten
tial effects of\nsmall scale fluctuations on large scale properties of tur
bulent\nfluids.\n
DTSTART:20210315T203000Z
DTEND:20210315T213000Z
LAST-MODIFIED:20210216T162345Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-140
END:VEVENT
BEGIN:VEVENT
UID:c7ac7c7a-8ed0-425d-859e-9e2e8947afec
DTSTAMP:20210308T215705Z
CREATED:20201211T183906Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Ricky I Liu\n\nAffiliation: Member\, Sc
hool of Mathematics\n\n
DTSTART:20210316T143000Z
DTEND:20210316T163000Z
LAST-MODIFIED:20210216T131103Z
LOCATION:
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-473
END:VEVENT
BEGIN:VEVENT
UID:02d877e9-50ab-4c0e-8d48-7074d087e8e9
DTSTAMP:20210308T215705Z
CREATED:20210201T193251Z
DESCRIPTION:
DTSTART:20210316T163000Z
DTEND:20210316T173000Z
LAST-MODIFIED:20210201T193319Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-5
END:VEVENT
BEGIN:VEVENT
UID:0005b2fa-37ad-42f4-bbd1-e5d692e542d2
DTSTAMP:20210308T215705Z
CREATED:20210105T221755Z
DESCRIPTION:Topic: Localisations and base change theorems\n\nSpeakers: Carl
os Tschudi Simpson\n\nAffiliation: CNRS\, Université de Nice Sophia Antipo
lis\n\n
DTSTART:20210316T173000Z
DTEND:20210316T193000Z
LAST-MODIFIED:20210305T171521Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-19
END:VEVENT
BEGIN:VEVENT
UID:baa8f432-d046-4a18-a167-de3aa713d460
DTSTAMP:20210308T215705Z
CREATED:20210106T222110Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210316T190000Z
DTEND:20210316T210000Z
LAST-MODIFIED:20210106T233507Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-17
END:VEVENT
BEGIN:VEVENT
UID:20c40df5-e3a1-41df-89c5-489b84e5eded
DTSTAMP:20210308T215705Z
CREATED:20210115T153122Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Antoine Marchal\n\nAffiliation: Univers
ity of Toronto/CITA\n\n
DTSTART:20210317T150000Z
DTEND:20210317T160000Z
LAST-MODIFIED:20210115T153217Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Star Formation/ISM Rendezvous (SFIR)
URL:https://www.ias.edu/sns/events/princeton-university-star-formationism-r
endezvous-sfir-6
END:VEVENT
BEGIN:VEVENT
UID:db867571-ee9b-47e3-af2b-c0d03c8401f2
DTSTAMP:20210308T215705Z
CREATED:20210105T233215Z
DESCRIPTION:Topic: Approximate representations of symplectomorphisms via qu
antization\n\nSpeakers: Leonid Polterovich\n\nAffiliation: Tel Aviv Univer
sity\n\nWe argue that quantization\, a mathematical model of the quantum\n
classical correspondence\, gives rise to approximate unitary\nrepresentati
ons of symplectomorphism groups. As an application\, we get\nan obstructio
n to symplectic action of Lubotzky-Oppenheim non $p$-norm\napproximated gr
oups. Preliminaries on symplectic geometry and\nquantization will be expla
ined. Joint work with Laurent Charles.
DTSTART:20210317T150000Z
DTEND:20210317T161500Z
LAST-MODIFIED:20210209T211546Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-18
END:VEVENT
BEGIN:VEVENT
UID:c1fb3b21-4481-4062-a601-9fa7fdccd868
DTSTAMP:20210308T215705Z
CREATED:20201028T183921Z
DESCRIPTION:Topic: An Egyptian Sheikh’s Literary World\n\n“An Egyptian Shei
kh’s Literary World” digitally reconstructs the\nlarge book collection of
Sheikh Mustafa Salamah al-Najjari (d.\n1286/1870)\, an important intellect
ual in late Ottoman Egypt. We use\nthe 480 print and manuscript titles and
valuations listed in his\ninheritance inventory as the foundation for our
data set. From there\,\nwe attempt to identify and track down these works
\, which we then\nconsult to enhance our data set via information that we
gather by\nhand. Our goal is to visualize bibliographic\, economic\, geogr
aphic\,\nand network data\, in order to analyze what we know — and have ye
t to\ndiscover — about this world of texts. This ongoing project is the\n
first empirical history of the coexistence of manuscript and print\ncultur
e in Cairo\, and we are just beginning to build our first\nvisualizations.
Our presentation will explore the stages of our work\,\nthe tensions betw
een scholarly detail and digital remediation that\nhave arisen at each of
these stages\, and what the current digital turn\nis allowing us to start
to ’see’ about Cairene textual culture\nduring this earlier watershed era.
\n\nSPEAKERS:\nADAM MESTYAN (Duke University)\nKATHRYN SCHWARZ (Universit
y of Massachusetts Amherst)\n\nREGISTER IN ADVANCE FOR THIS WEBINAR HERE\n
[https://theias.zoom.us/webinar/register/WN__Aw5bm-BRAqv3-QuUP9nag].\nAfte
r registering\, you will receive a confirmation email containing\ninformat
ion about joining the webinar.\n
DTSTART:20210317T160000Z
DTEND:20210317T173000Z
LAST-MODIFIED:20210202T192749Z
LOCATION:Webinar
SUMMARY:Near Eastern Studies and Digital Scholarship @IAS Joint Lecture
URL:https://www.ias.edu/hs/events/near-eastern-studies-and-digital-scholars
hip-ias-joint-lecture
END:VEVENT
BEGIN:VEVENT
UID:2aee047d-58d4-483a-a03d-8fa044baa738
DTSTAMP:20210308T215705Z
CREATED:20210106T003047Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210317T190000Z
DTEND:20210317T210000Z
LAST-MODIFIED:20210106T003056Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-22
END:VEVENT
BEGIN:VEVENT
UID:d0be8af2-eea4-4911-9ae5-5a1b06c717ac
DTSTAMP:20210308T215705Z
CREATED:20210106T004909Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Jo Nelson\n\nAffiliation: R
ice University\n\n
DTSTART:20210317T213000Z
DTEND:20210317T230000Z
LAST-MODIFIED:20210125T190949Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-204
END:VEVENT
BEGIN:VEVENT
UID:455de77a-a263-4fa8-9ad9-f327482fd449
DTSTAMP:20210308T215705Z
CREATED:20201210T013142Z
DESCRIPTION:
DTSTART:20210318T140000Z
DTEND:20210318T160000Z
LAST-MODIFIED:20210106T042223Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-21
END:VEVENT
BEGIN:VEVENT
UID:a0fc347e-569d-4da2-94ba-7e43c13dc22f
DTSTAMP:20210308T215705Z
CREATED:20210113T164155Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Lev Arzamasskiy\n\nAffiliation: The Ins
titute for Advanced Study\n\n
DTSTART:20210318T150000Z
DTEND:20210318T160000Z
LAST-MODIFIED:20210113T164242Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-6
END:VEVENT
BEGIN:VEVENT
UID:e691be22-9d3c-4727-903b-ec41fb845ef2
DTSTAMP:20210308T215705Z
CREATED:20210107T005019Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210318T200000Z
DTEND:20210318T220000Z
LAST-MODIFIED:20210107T005026Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-7
END:VEVENT
BEGIN:VEVENT
UID:6d6bb1d6-1638-4c60-94ba-8c788e7b66a2
DTSTAMP:20210308T215705Z
CREATED:20210106T011141Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210318T203000Z
DTEND:20210318T213000Z
LAST-MODIFIED:20210108T165727Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-443
END:VEVENT
BEGIN:VEVENT
UID:b00d95df-d4a1-40ac-aa72-69c2ea37252a
DTSTAMP:20210308T215705Z
CREATED:20210205T161010Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Huirong Yan\n\nAffiliation: DESY/Potsda
m\n\n
DTSTART:20210319T053000Z
DTEND:20210319T170000Z
LAST-MODIFIED:20210205T164514Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-6
END:VEVENT
BEGIN:VEVENT
UID:d55d88a7-4f31-4593-8c1a-88fbdfecb0a4
DTSTAMP:20210308T215705Z
CREATED:20210106T022003Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210319T131500Z
DTEND:20210319T144500Z
LAST-MODIFIED:20210208T183518Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-63
END:VEVENT
BEGIN:VEVENT
UID:fed3f7b4-5001-4a78-9f57-cdee488808ab
DTSTAMP:20210308T215705Z
CREATED:20201217T165237Z
DESCRIPTION:Topic: The Turn to the Medieval in Ethiopian Studies – The Turn
to Ethiopia in Medieval Studies II\n\nThis is the third event of a webina
r series IAS Ethiopian Studies\n\nCONVENORS: Suzanne Akbari (IAS)\, Aaron
Butts (CUA / IAS)\, Samantha L.\nKelly (Rutgers U / IAS)\, Sabine Schmidtk
e (IAS)\n\n We are eager to think together about the rich and often challe
nging\ncomplexities that have arisen as a result of the intersection of\nM
edieval Studies and Ethiopian Studies over the past several years.\nThese
fields developed along very different lines\, but have begun to\nmutually
enrich – and interrogate – one another. In terms of\nregional networks\, t
he two fields overlap in their concern with\npolitical\, commercial\, and
cultural connections in the eastern\nMediterranean: while Ethiopia represe
nts for Medieval Studies an\noutgrowth of Mediterranean Studies\, extendin
g investigation for such\nexchanges down the Red Sea\, Europe similarly re
presents for Ethiopian\nStudies a secondary ring of this zone of contact.
Additional\ninformation here\n[https://www.ias.edu/hs/ias-ethiopian-studie
s-series]. REGISTER IN\nADVANCE FOR THIS MEETING HERE\n[https://theias.zoo
m.us/meeting/register/tZUocuqvrD4sHdS3DSFZePyXstD0UYTXCyGX].\n\nPanelists:
\nALESSANDRO BAUSI (Universität Hamburg)\nVERENA B. KREBS (Ruhr-Universitä
t Bochum)\nEYOB DERILLO (The British Library)\nSAMANTHA L. KELLY (Rutgers
and IAS)\n\n \n
DTSTART:20210319T160000Z
DTEND:20210319T173000Z
LAST-MODIFIED:20210113T211440Z
LOCATION:ZOOM Meeting
SUMMARY:IAS Ethiopian Studies Series
URL:https://www.ias.edu/hs/events/ias-ethiopian-studies-series-0
END:VEVENT
BEGIN:VEVENT
UID:ec376264-76d0-49ed-a970-7e68ede150f8
DTSTAMP:20210308T215705Z
CREATED:20210226T010812Z
DESCRIPTION:Topic: Physics of functional networks\n\nSpeakers: Henrik Ronel
lenfitsch\n\nAffiliation: Williams College\n\nWe are surrounded by functio
nal networks\, from fluid transport in\nplants and animals to macroscopic
elastic scaffoldings and microscopic\ncrystals and materials\, and enginee
red power grids. Often\, such\nnetworks can be seen as optimized for their
function\, either through\nevolution and natural selection or by human de
sign. In this\npresentation\, we investigate a number of functional networ
ks from\nbiology and engineering and show how optimization shapes their\nw
eighted topology in similar ways despite their different functional\ngoals
.\n
DTSTART:20210319T180000Z
DTEND:20210319T190000Z
LAST-MODIFIED:20210226T010842Z
LOCATION:Remote Access
SUMMARY:Workshop on Topology: Identifying Order in Complex Systems
URL:https://www.ias.edu/math/events/workshop-topology-identifying-order-com
plex-systems-132
END:VEVENT
BEGIN:VEVENT
UID:7b1683c9-0c9a-4737-a069-ec0a61c4139d
DTSTAMP:20210308T215705Z
CREATED:20210115T162846Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210319T190000Z
DTEND:20210319T200000Z
LAST-MODIFIED:20210115T163003Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-7
END:VEVENT
BEGIN:VEVENT
UID:10aa3440-a05f-4802-b519-09cb114304c4
DTSTAMP:20210308T215705Z
CREATED:20210219T144305Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Grace Telford\n\nAffiliation: Rutgers U
niversity\n\nEach week\, we hold a relatively informal seminar/discussion
series\nwith an emphasis on extra-galactic and large-scale structure\nastr
ophysics.\n\nDuring Galread a leader/visitor presents a recent paper to th
e\ndiscussion group. The PDF of the paper is projected onto a large\nscree
n\, and a guest explains the paper\, section by section\, in greater\ndeta
il than may be explained within the text of the article. To aid\nwith disc
ussion\, only the article PDF is presented -- no\npowerpoint-style slides.
Galread discussions are very friendly and\ninteractive.\n
DTSTART:20210322T150000Z
DTEND:20210322T160000Z
LAST-MODIFIED:20210219T152713Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-5
END:VEVENT
BEGIN:VEVENT
UID:e8d9e406-9fff-47f3-897e-e6f4a7ceda4f
DTSTAMP:20210308T215705Z
CREATED:20201211T183006Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Leonardo Nagami Coregliano\n\nAffiliati
on: University of Chicago\n\n
DTSTART:20210322T151500Z
DTEND:20210322T161500Z
LAST-MODIFIED:20210125T132913Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-479
END:VEVENT
BEGIN:VEVENT
UID:4e5cdf11-124b-4334-b6e2-abc9ae760f68
DTSTAMP:20210308T215705Z
CREATED:20210114T152306Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Marta Bryan\n\n
DTSTART:20210322T160000Z
DTEND:20210322T170000Z
LAST-MODIFIED:20210219T153705Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-3
END:VEVENT
BEGIN:VEVENT
UID:5cb372f7-2136-4449-9347-1bd6b4dbb65d
DTSTAMP:20210308T215705Z
CREATED:20210114T150412Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210322T163000Z
DTEND:20210322T180000Z
LAST-MODIFIED:20210210T170615Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-7
END:VEVENT
BEGIN:VEVENT
UID:daba8cd1-d31a-4972-a9bc-ac126fd07a67
DTSTAMP:20210308T215705Z
CREATED:20201209T231731Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Nathalie Wahl\n\nAffiliatio
n: University of Copenhagen\; Member\, School of Mathematics\n\n
DTSTART:20210322T180000Z
DTEND:20210322T190000Z
LAST-MODIFIED:20210105T202709Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-358
END:VEVENT
BEGIN:VEVENT
UID:a7f89397-b7b9-43ac-8498-abbd31637589
DTSTAMP:20210308T215705Z
CREATED:20210105T212101Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Ruixiang Zhang\n\nAffiliati
on: University of Wisconsin-Madison\; Member\, School of Mathematics\n\n
DTSTART:20210322T203000Z
DTEND:20210322T213000Z
LAST-MODIFIED:20210201T161734Z
LOCATION:
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-141
END:VEVENT
BEGIN:VEVENT
UID:80bee14c-eb74-4951-b5d2-aa8214a53d18
DTSTAMP:20210308T215705Z
CREATED:20201211T183932Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Jeroen Zuiddam\n\nAffiliation: New York
University - Courant Institute of Mathematical Sciences\n\n
DTSTART:20210323T143000Z
DTEND:20210323T163000Z
LAST-MODIFIED:20210308T161027Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-474
END:VEVENT
BEGIN:VEVENT
UID:417e8397-1801-4f27-9027-d6fc3f89c691
DTSTAMP:20210308T215705Z
CREATED:20210201T193330Z
DESCRIPTION:
DTSTART:20210323T163000Z
DTEND:20210323T173000Z
LAST-MODIFIED:20210201T193351Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-6
END:VEVENT
BEGIN:VEVENT
UID:770784cf-2375-4ac5-b485-54c3248d7a52
DTSTAMP:20210308T215705Z
CREATED:20210105T221812Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210323T173000Z
DTEND:20210323T193000Z
LAST-MODIFIED:20210105T221822Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-20
END:VEVENT
BEGIN:VEVENT
UID:e32ceaa9-23b0-45a0-a43a-4a2250cc13ea
DTSTAMP:20210308T215705Z
CREATED:20210106T222126Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210323T190000Z
DTEND:20210323T210000Z
LAST-MODIFIED:20210106T233527Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-18
END:VEVENT
BEGIN:VEVENT
UID:eac1547e-b9c6-43f8-8ef2-b4aa3a3205e5
DTSTAMP:20210308T215705Z
CREATED:20210115T153234Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Jenny Kim\n\nAffiliation: University of
Heidelberg\n\n
DTSTART:20210324T150000Z
DTEND:20210324T160000Z
LAST-MODIFIED:20210115T153318Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Star Formation/ISM Rendezvous (SFIR)
URL:https://www.ias.edu/sns/events/princeton-university-star-formationism-r
endezvous-sfir-7
END:VEVENT
BEGIN:VEVENT
UID:5af8d7be-8efc-4d36-b533-0fbdf0419349
DTSTAMP:20210308T215705Z
CREATED:20210105T233231Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210324T150000Z
DTEND:20210324T161500Z
LAST-MODIFIED:20210105T233238Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-19
END:VEVENT
BEGIN:VEVENT
UID:3aee6f36-2758-4d4c-9c2c-62f1ea0f8679
DTSTAMP:20210308T215705Z
CREATED:20210106T003104Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210324T190000Z
DTEND:20210324T210000Z
LAST-MODIFIED:20210106T003112Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-23
END:VEVENT
BEGIN:VEVENT
UID:25bbb5dd-3e26-4e06-8467-34128bbd3240
DTSTAMP:20210308T215705Z
CREATED:20210106T004926Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Jayadev Athreya\n\nAffiliat
ion: University of Washington\n\n
DTSTART:20210324T213000Z
DTEND:20210324T230000Z
LAST-MODIFIED:20210125T191155Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-205
END:VEVENT
BEGIN:VEVENT
UID:2707b5ce-36f0-4eea-81d5-7755101c574c
DTSTAMP:20210308T215705Z
CREATED:20201210T013155Z
DESCRIPTION:
DTSTART:20210325T140000Z
DTEND:20210325T160000Z
LAST-MODIFIED:20210106T042322Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-22
END:VEVENT
BEGIN:VEVENT
UID:edbf395a-a220-47b9-b8d0-258a1883ad28
DTSTAMP:20210308T215705Z
CREATED:20210113T164254Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Horng Sheng Chia\n\nAffiliation: The In
stitute for Advanced Study\n\n
DTSTART:20210325T150000Z
DTEND:20210325T160000Z
LAST-MODIFIED:20210113T164320Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-7
END:VEVENT
BEGIN:VEVENT
UID:4b3457e2-ee0a-4734-94ad-6bdf67d10add
DTSTAMP:20210308T215705Z
CREATED:20210303T191608Z
DESCRIPTION:Topic: The Road to the Quran Keyword Database\n\nThe Institute
for Advanced Study\, in partnership with Gorgias Press\,\nis delighted to
announce the launch of a new online lecture program\,\nThe Author's Voice
[/media/193971]. \n\nThe inaugural lecture will be given by Elie Wardini\,
Professor of\nArabic in the Department of Asia\, Middle Eastern and Turki
sh Studies\nat Stockholm University. The talk builds on his recent and for
thcoming\nGorgias Press publications\, which you can explore here\n[https:
//www.gorgiaspress.com/eliewardini].\n\nAbstract: My work on the lexicon o
f the Quran stems from my interest\nin contact between Aramaic and Arabic.
A question to ask is: ‘What\nhas the Quran contributed to the lexicon of
Arabic? And what are its\nsources?’ Using the Tanzil.net digital Uthmani t
ext of the Quran\, I\nset up a relational database\, using FileMaker Pro\,
in order to conduct\na comprehensive analysis of keywords in context of t
he lexicon of the\nQuran contrasted to the lexicon of Ibn Hisham’s Sira. T
he data from\nthe Quran nevertheless offered much more information than an
ticipated\,\nand in more fields than were intended. In the talk\, I will p
resent\nsome aspects of my approach and methods.\n\nThis is a free Zoom le
cture. You can register at this link\n[https://theias.zoom.us/meeting/regi
ster/tZArdOyqqDwuHt1OZ0yfJesHTQmnfG4tH51D]. After\nregistering\, you will
receive an email containing information about\njoining the lecture.\n\n \n
DTSTART:20210325T160000Z
DTEND:20210325T160000Z
LAST-MODIFIED:20210305T162635Z
LOCATION:Online
SUMMARY:The Author's Voice
URL:https://www.ias.edu/hs/events/authors-voice
END:VEVENT
BEGIN:VEVENT
UID:592bc470-d141-4cb1-97a4-3566f71c01e5
DTSTAMP:20210308T215705Z
CREATED:20210114T171112Z
DESCRIPTION:Topic: The Baryon Cycle in Dwarf-Dwarf Mergers: Fueling Hierarc
hical Assembly\n\nSpeakers: Sabrina Stierwalt\n\nAffiliation: Occidental C
ollege\n\nBoth cosmological simulations and observations of the ultraviole
t\nluminosity function suggest dwarf galaxies are the dominant population
\nat high redshifts and that the galaxy merger rate per unit volume is\ndo
minated by low mass galaxies. However\, dwarf-dwarf interactions have\nnot
yet been subject to systematic study\, even in the nearby universe.\nI wi
ll report on our efforts to do just that: TiNy Titans is the first\nsystem
atic study of a sample of isolated interacting dwarf galaxies\nand the mec
hanisms governing their star formation. How much of what we\nknow about ma
ssive galaxy mergers - triggering of starbursts\,\nsignificant rearranging
of gas & dust\, AGN growth - occur in the\nshallower gravitational potent
ial wells of dwarf galaxies? Do we\nobserve these low mass mergers at the
rate predicted by cosmological\nsimulations? Do groups of only dwarf galax
ies exist? In particular\, I\nwill highlight our most recent results inves
tigating the star cluster\npopulations in these dwarf mergers observed wit
h high resolution\nHubble imaging.\n
DTSTART:20210325T173000Z
DTEND:20210325T183000Z
LAST-MODIFIED:20210219T171341Z
LOCATION:Virtual Meeting
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
6
END:VEVENT
BEGIN:VEVENT
UID:41f389ca-52d5-42a1-9e84-5439e1fa79a2
DTSTAMP:20210308T215705Z
CREATED:20210107T005035Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210325T200000Z
DTEND:20210325T220000Z
LAST-MODIFIED:20210107T005044Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-8
END:VEVENT
BEGIN:VEVENT
UID:503ab448-165c-4ca5-b8cd-27659a019edb
DTSTAMP:20210308T215705Z
CREATED:20210106T011157Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210325T203000Z
DTEND:20210325T213000Z
LAST-MODIFIED:20210108T165806Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-444
END:VEVENT
BEGIN:VEVENT
UID:3aa28771-a9bf-4882-a426-de009373c4de
DTSTAMP:20210308T215705Z
CREATED:20210106T022020Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210326T131500Z
DTEND:20210326T144500Z
LAST-MODIFIED:20210208T183539Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-64
END:VEVENT
BEGIN:VEVENT
UID:cc29b4bc-e987-40cd-a57e-f238f1e90ecc
DTSTAMP:20210308T215705Z
CREATED:20210205T161041Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Benoit Cerutti\n\nAffiliation: CNRS/Gre
noble\n\n
DTSTART:20210326T163000Z
DTEND:20210326T180000Z
LAST-MODIFIED:20210205T163914Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-7
END:VEVENT
BEGIN:VEVENT
UID:9cc046e4-f145-4dec-895a-0d806a43359b
DTSTAMP:20210308T215705Z
CREATED:20210114T142852Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Emily Cunningham\n\nAffiliation: CCA Fl
atiron Institute\n\nEach week\, we hold a relatively informal seminar/disc
ussion series\nwith an emphasis on extra-galactic and large-scale structur
e\nastrophysics.\n\nDuring Galread a leader/visitor presents a recent pape
r to the\ndiscussion group. The PDF of the paper is projected onto a large
\nscreen\, and a guest explains the paper\, section by section\, in greate
r\ndetail than may be explained within the text of the article. To aid\nwi
th discussion\, only the article PDF is presented -- no\npowerpoint-style
slides. Galread discussions are very friendly and\ninteractive.\n
DTSTART:20210329T150000Z
DTEND:20210329T160000Z
LAST-MODIFIED:20210114T142954Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-8
END:VEVENT
BEGIN:VEVENT
UID:d658a7c6-9559-4c69-b5ce-c04e226628a2
DTSTAMP:20210308T215705Z
CREATED:20201211T183039Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Tselil Schramm\n\nAffiliation: Stanford
University\n\n
DTSTART:20210329T151500Z
DTEND:20210329T161500Z
LAST-MODIFIED:20210209T134339Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-480
END:VEVENT
BEGIN:VEVENT
UID:9edbcd45-f5d1-4a67-8ec1-99ad0d5c345c
DTSTAMP:20210308T215705Z
CREATED:20210114T152337Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210329T160000Z
DTEND:20210329T170000Z
LAST-MODIFIED:20210219T153734Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-4
END:VEVENT
BEGIN:VEVENT
UID:f7513b5a-65c2-45f4-a7da-43660dafbc4d
DTSTAMP:20210308T215705Z
CREATED:20210114T150444Z
DESCRIPTION:Topic: TBA\n\nSpeakers: François Lanusse\n\n
DTSTART:20210329T163000Z
DTEND:20210329T180000Z
LAST-MODIFIED:20210219T155243Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-3
END:VEVENT
BEGIN:VEVENT
UID:b0e8f539-ef0b-4270-8763-498e270c9264
DTSTAMP:20210308T215705Z
CREATED:20210302T001112Z
DESCRIPTION:Topic: Towards canonical bases in homology of symplectic resolu
tions\n\nSpeakers: Roman Bezrukavnikov\n\nAffiliation: Massachusetts Insti
tute of Technology\; Member\, School of Mathematics\n\nI will describe a p
rogram aimed at understanding numerics of\nrepresentations of quantized sy
mplectic resolutions in positive\ncharacteristic. A key ingredient is a ge
neralization of the action of\nthe affine braid group on the derived categ
ory of coherent sheaves on\nthe Springer resolution. Partly based on a joi
nt project with Okounkov\nand an earlier paper with Anno and Mirkovic.\n
DTSTART:20210329T180000Z
DTEND:20210329T190000Z
LAST-MODIFIED:20210302T015816Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry
END:VEVENT
BEGIN:VEVENT
UID:891452a8-6939-4417-9279-54c684d30bcb
DTSTAMP:20210308T215705Z
CREATED:20201209T231745Z
DESCRIPTION:Topic: No seminar: workshop\n\n
DTSTART:20210329T180000Z
DTEND:20210329T190000Z
LAST-MODIFIED:20210105T200406Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-359
END:VEVENT
BEGIN:VEVENT
UID:1261616d-4105-4816-ae1e-c9258a893507
DTSTAMP:20210308T215705Z
CREATED:20210302T001137Z
DESCRIPTION:Topic: Smith theory and Langlands functoriality\n\nSpeakers: To
ny Feng\n\nAffiliation: Member\, School of Mathematics\n\nAccording to Lan
glands’ conjectures\, algebraic automorphic forms\nshould be parametrized
by global Galois representations\, and smooth\nrepresentations of $p$-adic
groups should be parametrized by local\nGalois representations. These par
ametrizations have recently been\nconstructed in the function field contex
t by Vincent Lafforgue in the\nglobal setting\, and Genestier-Lafforgue in
the local setting. Using\nrecent tools in modular representation theory\,
including Smith theory\nand parity sheaves\, we prove that these parametr
izations enjoy certain\nexpected functoriality properties. Globally\, we e
stablish the\nexistence of functorial transfers of mod p automorphic forms
through\n$p$-cyclic base change. Locally\, we prove that Tate cohomology
\nrealizes cyclic base change functoriality in the mod $p$\nGenestier-Laff
orgue correspondence\, verifying a function field version\nof a conjecture
of Treumann-Venkatesh.\n
DTSTART:20210329T193000Z
DTEND:20210329T203000Z
LAST-MODIFIED:20210302T020000Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-0
END:VEVENT
BEGIN:VEVENT
UID:fc657cb6-7146-4d2d-97a2-ba0e23cec523
DTSTAMP:20210308T215705Z
CREATED:20210105T212116Z
DESCRIPTION:Topic: Mean-Field limits for Coulomb-type dynamics\n\nSpeakers:
Sylvia Serfaty\n\nAffiliation: New York University\n\nWe consider a syste
m of $N$ particles evolving according to the\ngradient flow of their Coulo
mb or Riesz interaction\, or a similar\nconservative flow\, and possible a
dded random diffusion. By Riesz\ninteraction\, we mean inverse power $s$ o
f the distance with $s$\nbetween $d-2$ and $d$ where $d$ denotes the dimen
sion. We present a\nconvergence result as $N$ tends to infinity to the exp
ected limiting\nmean field evolution equation. We also discuss the derivat
ion of\nVlasov-Poisson from newtonian dynamics in the monokinetic case\, a
s\nwell as related results for Ginzburg-Landau vortex dynamics.\n
DTSTART:20210329T203000Z
DTEND:20210329T213000Z
LAST-MODIFIED:20210305T200236Z
LOCATION:
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-142
END:VEVENT
BEGIN:VEVENT
UID:3feaa81e-0caf-4b5a-8421-33e854e8e782
DTSTAMP:20210308T215705Z
CREATED:20210302T001159Z
DESCRIPTION:Topic: Modular perverse sheaves on symplectic singularities\n\n
Speakers: Tom Braden\n\nAffiliation: University of Massachusetts\; Member\
, School of Mathematics\n\nA symplectic singularity has a natural stratifi
cation by Poisson\nleaves\, which are symplectic\, hence even-dimensional.
Perverse\nsheaves constructible with respect to this stratification are
\nsemisimple if the coefficients are in characteristic zero\, but with\nch
aracteristic p coefficients the categories can be complicated. I\nwill di
scuss two cases where this category has been understood. For\nthe nilpote
nt cone of $GL(n)$\, Mautner showed that perverse sheaves\nare equivalent
to representations of a Schur algebra $S(n\,n)$\, which\nis a highest weig
ht category and is its own Ringel dual. In joint\nwork with Mautner\, we
showed that perverse sheaves on an affine\nhypertoric variety form a highe
st weight category which is Ringel dual\nto the same category for the symp
lectic dual hypertoric variety. \nTime permitting\, I will discuss what mi
ght be true for other\nsymplectic singularities.\n
DTSTART:20210329T210000Z
DTEND:20210329T220000Z
LAST-MODIFIED:20210302T020019Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-1
END:VEVENT
BEGIN:VEVENT
UID:00b80aec-cb29-4c20-badb-e4df6f5149ff
DTSTAMP:20210308T215705Z
CREATED:20210302T001222Z
DESCRIPTION:Topic: Reducing mod p in many small steps\n\nSpeakers: George L
usztig\n\nAffiliation: Massachusetts Institute of Technology\n\nReduction
mod p of rational representation of a semi-simple group over\ncomplex numb
ers can be doneas a succession of small steps. This leads\nto a reformulat
ion of the character formula for modular\nrepresentations in large charact
eristic which does not make use of the\nSteinberg tensor product theorem.
\n
DTSTART:20210330T130000Z
DTEND:20210330T140000Z
LAST-MODIFIED:20210308T133402Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-2
END:VEVENT
BEGIN:VEVENT
UID:f07393dd-319d-46ae-b91b-1198a0bb3d03
DTSTAMP:20210308T215705Z
CREATED:20201211T184005Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210330T143000Z
DTEND:20210330T163000Z
LAST-MODIFIED:20210119T232658Z
LOCATION:
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-475
END:VEVENT
BEGIN:VEVENT
UID:a228899e-e056-412f-84ca-c85ff4d3e792
DTSTAMP:20210308T215705Z
CREATED:20210302T001246Z
DESCRIPTION:Topic: Flag manifolds over semifields I\n\nSpeakers: Huanchen B
ao\n\nAffiliation: National University of Singapore\; Member\, School of M
athematics\n\nThe study of totally positive matrices\, i.e.\, matrices wit
h positive\nminors\, dates back to 1930s. The theory was generalised by Lu
sztig to\narbitrary split reductive groups using canonical bases\, and has
\nsignificant impacts on the theory of cluster algebras\, higher\nteichmul
ler theory\, etc. In the first talk\, we survey basics of total\npositivit
y and explain its generalization to general semifields for\nKac-Moody grou
ps. In the second talk\, we shall focus on totally\npositive flag manifold
s and discuss various topological properties.\n
DTSTART:20210330T143000Z
DTEND:20210330T153000Z
LAST-MODIFIED:20210302T020101Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-3
END:VEVENT
BEGIN:VEVENT
UID:330cabfe-fc77-4c78-a497-1b5d4da858e2
DTSTAMP:20210308T215705Z
CREATED:20210302T001308Z
DESCRIPTION:Topic: Springer\, Procesi and Cherednik\n\nSpeakers: Ivan Loseu
\n\nAffiliation: Yale University\; Member\, School of Mathematics\n\nThe t
alk is based on a joint work with Pablo Boixeda Alvarez. We study\nequivar
iant Borel-Moore homology of certain affine Springer fibers and\nrelate th
em to global sections of suitable vector bundles arising from\nProcesi bun
dles on Q-factorial terminalizations of symplectic quotient\nsingularities
. We use this relation to derive some information on the\ncenter of the pr
incipal block of the small quantum group. Our main\ntechnique is based on
studying bimodules over Cherednik algebras.\n
DTSTART:20210330T160000Z
DTEND:20210330T170000Z
LAST-MODIFIED:20210302T020120Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-4
END:VEVENT
BEGIN:VEVENT
UID:270ebd1f-bf0e-4b74-88e3-cc240939e555
DTSTAMP:20210308T215705Z
CREATED:20210201T193403Z
DESCRIPTION:
DTSTART:20210330T163000Z
DTEND:20210330T173000Z
LAST-MODIFIED:20210201T193424Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-7
END:VEVENT
BEGIN:VEVENT
UID:c2044f47-03cc-4f2c-ac97-9d295cef89aa
DTSTAMP:20210308T215705Z
CREATED:20210105T221829Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210330T173000Z
DTEND:20210330T193000Z
LAST-MODIFIED:20210105T221837Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-21
END:VEVENT
BEGIN:VEVENT
UID:a2cd5636-8e9d-458b-9985-c68797a9b15c
DTSTAMP:20210308T215705Z
CREATED:20210106T222141Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210330T190000Z
DTEND:20210330T210000Z
LAST-MODIFIED:20210106T233546Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-19
END:VEVENT
BEGIN:VEVENT
UID:e335977f-eee0-47c2-831f-f1c6cc2f19e7
DTSTAMP:20210308T215705Z
CREATED:20210105T233246Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210331T150000Z
DTEND:20210331T161500Z
LAST-MODIFIED:20210105T233255Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-20
END:VEVENT
BEGIN:VEVENT
UID:3e6ec9bf-032f-41f5-a9b5-07810b24eae0
DTSTAMP:20210308T215705Z
CREATED:20210115T153327Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Catherine Zucker\n\nAffiliation: Harvar
d University\, CfA\n\n
DTSTART:20210331T150000Z
DTEND:20210331T160000Z
LAST-MODIFIED:20210115T153406Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Star Formation/ISM Rendezvous (SFIR)
URL:https://www.ias.edu/sns/events/princeton-university-star-formationism-r
endezvous-sfir-8
END:VEVENT
BEGIN:VEVENT
UID:b47e8164-2e68-49b9-b20a-71524abf0ce4
DTSTAMP:20210308T215705Z
CREATED:20200921T192409Z
DESCRIPTION:Topic: SICLE: Saadian Intellectual and Cultural Life\n\nSpeaker
s: François Déroche and Nuria de Castilla\n\nAffiliation: Collège de Franc
e and École Pratique des Hautes Études\, Paris\n\nRegister in advance for
this webinar here\n[https://theias.zoom.us/webinar/register/WN_M68Stl4oRIu
ifapcrCP69Q].\nAfter registering\, you will receive a confirmation email c
ontaining\ninformation about joining the webinar.\n
DTSTART:20210331T160000Z
DTEND:20210331T160000Z
LAST-MODIFIED:20210305T163152Z
LOCATION:
SUMMARY:Near Eastern Studies Lecture
URL:https://www.ias.edu/events/near-eastern-studies-lecture-2
END:VEVENT
BEGIN:VEVENT
UID:7de5097a-6c46-4200-8b42-2bbcfeaafbf7
DTSTAMP:20210308T215705Z
CREATED:20210302T001331Z
DESCRIPTION:Topic: Webs in type C\n\nSpeakers: Benjamin Elias\n\nAffiliatio
n: University of Oregon\; von Neumann Fellow\, School of Mathematics\n\nIn
1997\, Kuperberg gave a generators-and-relations presentation of the\nmon
oidal category Fund\, whose objects are tensor products of\nfundamental re
presentations\, for all rank 2 lie algebras. The general\ncase has been an
open problem since. It was solved in type A in 2014\nby Cautis-Kamnitzer-
Morrison\, and this talk will be about the solution\nin type C\, which is
recent work of Bodish-Elias-Rose-Tatham. More\nimportantly\, we introduce
a basis of our category\, analogous to the\nbasis constructed in type A by
Elias in 2016. One of the goals of this\ntalk is to explain the philosoph
y of plethysm patterns and their\nassociated light ladders bases.\n
DTSTART:20210331T180000Z
DTEND:20210331T190000Z
LAST-MODIFIED:20210302T020417Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-5
END:VEVENT
BEGIN:VEVENT
UID:a6676e49-ce4d-404b-8b49-0c286f5a608b
DTSTAMP:20210308T215705Z
CREATED:20210106T003120Z
DESCRIPTION:Topic: No seminar: workshop\n\n
DTSTART:20210331T190000Z
DTEND:20210331T210000Z
LAST-MODIFIED:20210106T003827Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-24
END:VEVENT
BEGIN:VEVENT
UID:06d7837e-be64-4c8c-81c2-cf6adda9450a
DTSTAMP:20210308T215705Z
CREATED:20210302T001354Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Daniel Juteau\n\nAffiliatio
n: CNRS\, Université Paris Diderot\; Member\, School of Mathematics\n\n
DTSTART:20210331T193000Z
DTEND:20210331T203000Z
LAST-MODIFIED:20210302T020438Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-6
END:VEVENT
BEGIN:VEVENT
UID:f5774d2c-45bf-4efc-89ba-514f9def1085
DTSTAMP:20210308T215705Z
CREATED:20210302T001416Z
DESCRIPTION:Topic: Rationality properties of complex characters of finite g
roups\n\nSpeakers: Pham Tiep\n\nAffiliation: Rutgers University\; Member\
, School of Mathematics\n\nWhat can one say about the fields of values of
irreducible complex\ncharacters $\chi$ of a given finite group $G$? In par
ticular when $G$\nis a finite (quasi)simple group? What about the ``McKay
situation''\,\ni.e. when the degree of $\chi$ is coprime to a fixed prime
$p$? We\nwill discuss these and related questions\, and report on some rec
ent\nresults\, most of which are obtained jointly with G. Navarro.\n
DTSTART:20210331T210000Z
DTEND:20210331T220000Z
LAST-MODIFIED:20210302T020458Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-7
END:VEVENT
BEGIN:VEVENT
UID:7580cfe2-cb89-4027-9208-da9618ce36f7
DTSTAMP:20210308T215705Z
CREATED:20210106T004944Z
DESCRIPTION:Topic: What can be the fixed points of actions of finite (or co
mpact) groups on finite complexes of prescribed homotopy type?\n\nSpeakers
: Sylvain Cappell\n\nAffiliation: New York University\n\n
DTSTART:20210331T213000Z
DTEND:20210331T230000Z
LAST-MODIFIED:20210218T221449Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-206
END:VEVENT
BEGIN:VEVENT
UID:e86fe7a3-c0e5-42c6-8c7d-794b3fc5acb2
DTSTAMP:20210308T215705Z
CREATED:20210302T001439Z
DESCRIPTION:Topic: A Hecke action on the principle block\n\nSpeakers: Simon
Riche\n\nAffiliation: Université Paris 6\; Member\, School of Mathematics
\n\nI will explain the construction of an action of the Hecke category on
\nthe principal block of representations of a connected reductive\nalgebra
ic group over an algebraically closed field of positive\ncharacteristic\,
obtained in joint work with Roman Bezrukavnikov. As\nnoticed in earlier wo
rk with Geordie Williamson\, the existence of this\naction has nice conseq
uences\, in particular a character formula for\nindecomposable tilting mod
ules in terms of $p$-Kazhdan-Lusztig\npolynomials.\n
DTSTART:20210401T130000Z
DTEND:20210401T140000Z
LAST-MODIFIED:20210302T020518Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-8
END:VEVENT
BEGIN:VEVENT
UID:28346d34-db82-45f7-9ba3-206d43606979
DTSTAMP:20210308T215705Z
CREATED:20201210T013207Z
DESCRIPTION:
DTSTART:20210401T140000Z
DTEND:20210401T160000Z
LAST-MODIFIED:20210106T042420Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-23
END:VEVENT
BEGIN:VEVENT
UID:13134c25-49e8-45cb-9a0d-18e7b93c4394
DTSTAMP:20210308T215705Z
CREATED:20210302T001501Z
DESCRIPTION:Topic: Approximating tilting modules\n\nSpeakers: Peter Fiebig
\n\nAffiliation: Friedrich-Alexander-Universität Erlangen-Nürnberg\; Membe
r\, School of Mathematics\n\nUsing the arithmetics of quantum numbers we c
onstruct some\n“approximations” of tilting modules for reductive algebraic
groups\nthat might be useful for understanding the generational patterns
of\ntilting characters conjectured by Lusztig and Williamson.\n
DTSTART:20210401T143000Z
DTEND:20210401T153000Z
LAST-MODIFIED:20210302T020537Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-9
END:VEVENT
BEGIN:VEVENT
UID:994c6b47-06de-4b46-930d-a07d98d1c3a7
DTSTAMP:20210308T215705Z
CREATED:20210113T164333Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Elias Most\n\nAffiliation: The Institut
e for Advanced Study\n\n
DTSTART:20210401T150000Z
DTEND:20210401T160000Z
LAST-MODIFIED:20210113T174232Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-14
END:VEVENT
BEGIN:VEVENT
UID:7abbaf5a-05c6-4417-a315-16641a165fdc
DTSTAMP:20210308T215705Z
CREATED:20210302T001526Z
DESCRIPTION:Topic: Stokes phenomena\, Poisson-Lie groups and quantum groups
\n\nSpeakers: Valerio Toledano Laredo\n\nAffiliation: Northeastern Univers
ity\; Member\, School of Mathematics\n\nLet $G$ be a complex reductive gro
up\, $G^*$ its dual Poisson-Lie\ngroup\, and $g$ the Lie algebra of $G$. $
G$-valued Stokes phenomena\nwere exploited by P. Boalch to linearise the P
oisson structure on\n$G^*$. I will explain how $Ug$-valued Stokes phenomen
a can be used to\ngive a purely transcendental construction of the quantum
group $Uhg$\,\nand show that the semiclassical limit of this construction
recovers\nBoalch’s. The latter result is joint work with Xiaomeng Xu.\n
DTSTART:20210401T160000Z
DTEND:20210401T170000Z
LAST-MODIFIED:20210302T020557Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-10
END:VEVENT
BEGIN:VEVENT
UID:f0050cb3-4088-4a3f-bac2-047a80198174
DTSTAMP:20210308T215705Z
CREATED:20210107T005052Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210401T200000Z
DTEND:20210401T220000Z
LAST-MODIFIED:20210107T005101Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-9
END:VEVENT
BEGIN:VEVENT
UID:9702fea1-56c0-45ed-b08a-edcf6e3f9014
DTSTAMP:20210308T215705Z
CREATED:20210106T011215Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210401T203000Z
DTEND:20210401T213000Z
LAST-MODIFIED:20210108T165848Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-445
END:VEVENT
BEGIN:VEVENT
UID:1aa2154d-1e7e-4575-a343-2fa2ba440a61
DTSTAMP:20210308T215705Z
CREATED:20210106T022037Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210402T131500Z
DTEND:20210402T144500Z
LAST-MODIFIED:20210208T183601Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-65
END:VEVENT
BEGIN:VEVENT
UID:fd4c2797-b6da-4157-8064-e28667b798a0
DTSTAMP:20210308T215705Z
CREATED:20210205T161116Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210402T163000Z
DTEND:20210402T180000Z
LAST-MODIFIED:20210205T164310Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-8
END:VEVENT
BEGIN:VEVENT
UID:411eeae2-db16-49f0-8831-7f9cbd3efae5
DTSTAMP:20210308T215705Z
CREATED:20210302T001549Z
DESCRIPTION:Topic: Representations of p-adic groups\n\nSpeakers: Jessica Fi
ntzen\n\nAffiliation: University of Cambridge and Duke University\; Membe
r\, School of Mathematics\n\nThe Langlands program is a far-reaching colle
ction of conjectures that\nrelate different areas of mathematics including
number theory and\nrepresentation theory. A fundamental problem on the re
presentation\ntheory side of the local Langlands program is the constructi
on of all\n(irreducible\, smooth) representations of $p$-adic groups.\n\nI
intend to provide an overview of our understanding of the complex\nand mo
d-$\ell$ representations of $p$-adic groups and outline recent\ndevelopmen
ts.\n
DTSTART:20210402T180000Z
DTEND:20210402T190000Z
LAST-MODIFIED:20210302T020615Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-11
END:VEVENT
BEGIN:VEVENT
UID:cf84dbc1-83a1-4ecd-9308-d39441e0bf25
DTSTAMP:20210308T215705Z
CREATED:20210226T013322Z
DESCRIPTION:Topic: The missing link\n\nSpeakers: Vidit Nanda\n\nAffiliation
: Oxford University\n\nLinks of strata in singular spaces are fundamental
invariants which\ngovern the topology of small neighbourhoods around point
s in those\nstrata. This talk will focus on inferring links of strata from
\nincomplete information in three completely different contexts. In each\n
case\, there are exciting consequences of learning the structure of\nsuch
links.\n
DTSTART:20210402T180000Z
DTEND:20210402T190000Z
LAST-MODIFIED:20210226T013343Z
LOCATION:Remote Access
SUMMARY:Workshop on Topology: Identifying Order in Complex Systems
URL:https://www.ias.edu/math/events/workshop-topology-identifying-order-com
plex-systems-133
END:VEVENT
BEGIN:VEVENT
UID:bd92c3c6-a444-4621-a381-474f2ae60884
DTSTAMP:20210308T215705Z
CREATED:20210115T162918Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210402T190000Z
DTEND:20210402T200000Z
LAST-MODIFIED:20210115T162947Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-6
END:VEVENT
BEGIN:VEVENT
UID:1276f8b0-692e-4f1d-acf4-a58e79db5054
DTSTAMP:20210308T215705Z
CREATED:20210302T001613Z
DESCRIPTION:Topic: Lax 2-tensor constructions\n\nSpeakers: Raphaël Rouquier
\n\nAffiliation: University of California\, Los Angeles\; Member\, School
of Mathematics\n\nIn joint work with Andy Manion\, we required a generaliz
ation of the\ntensor product of 2-representations in order to reconstruct
the\n2-dimensional part of Lipshitz-Oszvath-Szabo’s bordered\nHeegaard-Flo
er theory. I will discuss this and possible perspectives\nfor the reconstr
uction of representation-theoretic or geometric\ncategories.\n
DTSTART:20210402T193000Z
DTEND:20210402T203000Z
LAST-MODIFIED:20210302T020635Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-12
END:VEVENT
BEGIN:VEVENT
UID:66fb3c42-9f37-4592-8519-247c9df780bb
DTSTAMP:20210308T215705Z
CREATED:20210302T001636Z
DESCRIPTION:Topic: Double covers of tori and the local Langlands correspond
ence\n\nSpeakers: Tasho Kaletha\n\nAffiliation: University of Michigan\n\n
Given a maximal torus $T$ of a connected reductive group $G$ over a\nlocal
field $F$\, there does not exist a canonical embedding of the\nL-group of
$T$ into the L-group of $G$. Generalizing work of Adams and\nVogan in the
case $F=R$\, we will construct a natural double cover of\nthe topological
group $T(F)$ and an associated L-group that does have\na canonical embedd
ing into the L-group of $G$. This leads to a natural\nbijection between di
screte Langlands parameters for $G$ emanating from\nthe Weil group of $F$\
, and certain pairs consisting of a maximal torus\nand a genuine character
of its double cover. The associated L-packet\ncan be characterized by its
stable character\, and we will give a\nformula for it in terms of the gen
uine character of the double cover.\nWe will then discuss an explicit cons
truction of this L-packet in the\nnon-archimedean case. Certain assumption
s on $p$ will be required.\n
DTSTART:20210402T210000Z
DTEND:20210402T220000Z
LAST-MODIFIED:20210302T020655Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-13
END:VEVENT
BEGIN:VEVENT
UID:910723df-aea2-46e0-b7d1-5d142def0798
DTSTAMP:20210308T215705Z
CREATED:20210302T001659Z
DESCRIPTION:Topic: Towards derived Satake equivalence for symmetric varieti
es\n\nSpeakers: Tsao-Hsien Chen\n\nAffiliation: University of Minnesota\;
Member\, School of Mathematics\n\nIn an ongoing project of D. Ben-Zvi\, Y.
Sakellaridis and A. Venkatesh\,\nthey propose a conjectural generalizatio
n of the derived Satake\nequivalence for complex groups to symmetric varie
ties $X=G/K$. We\npropose an approach to their conjecture using geometric
Langlands for\nreal reductive groups over the real projective line. We use
this\napproach to establish their conjecture in the example when the\nsym
metric pair $(G\,K)$ is $(GL_{2n}\,Sp_{2n})$. This is joint work with\nDav
id Nadler.\n
DTSTART:20210403T130000Z
DTEND:20210403T140000Z
LAST-MODIFIED:20210302T020713Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-14
END:VEVENT
BEGIN:VEVENT
UID:fde2954e-858e-469b-b50d-8494d37bd402
DTSTAMP:20210308T215705Z
CREATED:20210302T001723Z
DESCRIPTION:Topic: Flag manifolds over semifields II\n\nSpeakers: Xuhua He
\n\nAffiliation: Chinese University of Hong Kong\; Member\, School of Math
ematics\n\nThe study of totally positive matrices\, i.e.\, matrices with p
ositive\nminors\, dates back to 1930s. The theory was generalised by Luszt
ig to\narbitrary split reductive groups using canonical bases\, and has\ns
ignificant impacts on the theory of cluster algebras\, higher\nteichmuller
theory\, etc. In the first talk\, we survey basics of total\npositivity a
nd explain its generalization to general semifields for\nKac-Moody groups.
In the second talk\, we shall focus on totally\npositive flag manifolds a
nd discuss various topological properties.\n
DTSTART:20210403T143000Z
DTEND:20210403T153000Z
LAST-MODIFIED:20210302T020732Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-15
END:VEVENT
BEGIN:VEVENT
UID:22757f37-db93-4385-b18d-5c7f7a936789
DTSTAMP:20210308T215705Z
CREATED:20210302T001745Z
DESCRIPTION:Topic: The Drinfeld--Sokolov reduction of admissible representa
tions of affine Lie algebras\n\nAffiliation: Yale University\n\nLet $g$ be
a semisimple Lie algebra. The affine W-algebra associated\nto $g$ is a to
pological algebra which quantizes the algebraic loop\nspace of the Kostant
slice. It is constructed as a quantum Hamiltonian\n(alias quantum Drinfel
d--Sokolov) reduction of the corresponding\naffine Lie algebra. The admiss
ible representations (resp.\, minimal\nseries) are a family of highest wei
ght modules for affine Lie algebras\n(resp.\, affine W-algebras) distingui
shed by their role in rational\nconformal field theory. A basic pair of co
njectures proposed by\nFrenkel--Kac--Wakimoto state that two versions of t
he\nDrinfeld--Sokolov reduction functor send admissible representations of
\naffine Lie algebras to minimal series representations of W-algebras.\nFo
r one version\, the 'minus' reduction\, this was settled by Arakawa.\nWe h
ave confirmed the conjecture for the outstanding 'plus' reduction.\nThe ma
in new technical inputs come from the local quantum geometric\nLanglands p
rogram.\n
DTSTART:20210403T160000Z
DTEND:20210403T170000Z
LAST-MODIFIED:20210302T020751Z
LOCATION:Virtual
SUMMARY:Workshop on Representation Theory and Geometry
URL:https://www.ias.edu/math/events/workshop-representation-theory-and-geom
etry-16
END:VEVENT
BEGIN:VEVENT
UID:f34a69d0-2328-4c92-be3e-5e5462871610
DTSTAMP:20210308T215705Z
CREATED:20210219T144453Z
DESCRIPTION:Topic: Cloud-by-cloud\, multiphase\, Bayesian modeling: Applica
tion to four weak\, low ionization absorbers\n\nSpeakers: Sameer\n\nAffili
ation: Penn State University\n\nEach week\, we hold a relatively informal
seminar/discussion series\nwith an emphasis on extra-galactic and large-sc
ale structure\nastrophysics.\n\nDuring Galread a leader/visitor presents a
recent paper to the\ndiscussion group. The PDF of the paper is projected
onto a large\nscreen\, and a guest explains the paper\, section by section
\, in greater\ndetail than may be explained within the text of the article
. To aid\nwith discussion\, only the article PDF is presented -- no\npower
point-style slides. Galread discussions are very friendly and\ninteractive
.\n
DTSTART:20210405T150000Z
DTEND:20210405T160000Z
LAST-MODIFIED:20210219T150652Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-11
END:VEVENT
BEGIN:VEVENT
UID:be983b51-8d73-46ab-8577-99f3b622e9eb
DTSTAMP:20210308T215705Z
CREATED:20201211T183110Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Shuchi Chawla\n\nAffiliation: Universit
y of Wisconsin-Madison\n\n
DTSTART:20210405T151500Z
DTEND:20210405T161500Z
LAST-MODIFIED:20210202T153508Z
LOCATION:
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-481
END:VEVENT
BEGIN:VEVENT
UID:1a5c688e-de3a-44c1-873e-64082a718b96
DTSTAMP:20210308T215705Z
CREATED:20210114T152410Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210405T160000Z
DTEND:20210405T170000Z
LAST-MODIFIED:20210219T153805Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-5
END:VEVENT
BEGIN:VEVENT
UID:c4584e57-1d79-45d6-a187-ae599a6715c5
DTSTAMP:20210308T215705Z
CREATED:20210114T150517Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210405T163000Z
DTEND:20210405T180000Z
LAST-MODIFIED:20210219T155327Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-8
END:VEVENT
BEGIN:VEVENT
UID:0b66af54-3e6a-4a22-8d52-b4b2135774ba
DTSTAMP:20210308T215705Z
CREATED:20201209T231758Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Susan Friedlander\n\nAffili
ation: University of Southern California\; Member\, School of Mathematics
\n\n
DTSTART:20210405T180000Z
DTEND:20210405T190000Z
LAST-MODIFIED:20210216T161854Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-357
END:VEVENT
BEGIN:VEVENT
UID:19db83a0-bf92-4ad4-8c1a-d274cad2e678
DTSTAMP:20210308T215705Z
CREATED:20210105T212132Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210405T203000Z
DTEND:20210405T213000Z
LAST-MODIFIED:20210105T212142Z
LOCATION:
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-143
END:VEVENT
BEGIN:VEVENT
UID:1e4167ff-0c35-4437-aa35-4e264e0e8b8e
DTSTAMP:20210308T215705Z
CREATED:20201211T184029Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Toniann Pitassi\n\nAffiliation: Member\
, School of Mathematics\n\n
DTSTART:20210406T143000Z
DTEND:20210406T163000Z
LAST-MODIFIED:20210305T171541Z
LOCATION:
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-476
END:VEVENT
BEGIN:VEVENT
UID:56f3d906-d147-4c32-906f-19b1ff28506e
DTSTAMP:20210308T215705Z
CREATED:20210201T193441Z
DESCRIPTION:
DTSTART:20210406T163000Z
DTEND:20210406T173000Z
LAST-MODIFIED:20210201T193506Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-8
END:VEVENT
BEGIN:VEVENT
UID:0e535632-44a2-4bf5-9e5a-7b3a509f6d1c
DTSTAMP:20210308T215705Z
CREATED:20210105T221846Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210406T173000Z
DTEND:20210406T193000Z
LAST-MODIFIED:20210105T221856Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/math/events/working-group-stratified-homotopy-theor
y-22
END:VEVENT
BEGIN:VEVENT
UID:664b6fc6-db19-49fc-8feb-8decc2f77cf1
DTSTAMP:20210308T215705Z
CREATED:20210106T222157Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210406T190000Z
DTEND:20210406T210000Z
LAST-MODIFIED:20210106T233607Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-20
END:VEVENT
BEGIN:VEVENT
UID:b7e96d94-2a12-438a-9794-bc00828633ec
DTSTAMP:20210308T215705Z
CREATED:20210105T233304Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210407T150000Z
DTEND:20210407T161500Z
LAST-MODIFIED:20210105T233311Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-21
END:VEVENT
BEGIN:VEVENT
UID:f0dcd9ed-4fbe-4d99-8398-06c2addd592f
DTSTAMP:20210308T215705Z
CREATED:20210115T153418Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Enrico Di Teodoro\n\nAffiliation: Johns
Hopkins University\n\n
DTSTART:20210407T150000Z
DTEND:20210407T160000Z
LAST-MODIFIED:20210115T154006Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Star Formation/ISM Rendezvous (SFIR)
URL:https://www.ias.edu/sns/events/princeton-university-star-formationism-r
endezvous-sfir-9
END:VEVENT
BEGIN:VEVENT
UID:d844dedc-5107-4b70-9dcf-057e5f6003a4
DTSTAMP:20210308T215705Z
CREATED:20210106T003136Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210407T190000Z
DTEND:20210407T210000Z
LAST-MODIFIED:20210106T003145Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-25
END:VEVENT
BEGIN:VEVENT
UID:2096c75f-a15d-4e3d-94dd-6556019a4e35
DTSTAMP:20210308T215705Z
CREATED:20210106T005000Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210407T213000Z
DTEND:20210407T230000Z
LAST-MODIFIED:20210106T005008Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-207
END:VEVENT
BEGIN:VEVENT
UID:67d6eeec-00f9-41d3-8abb-655d8f5cc408
DTSTAMP:20210308T215705Z
CREATED:20201210T013221Z
DESCRIPTION:
DTSTART:20210408T140000Z
DTEND:20210408T160000Z
LAST-MODIFIED:20210106T042517Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-24
END:VEVENT
BEGIN:VEVENT
UID:21568f31-38d1-4694-871e-965a9b45839d
DTSTAMP:20210308T215705Z
CREATED:20210113T164413Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Ken Freeman\n\nAffiliation: Australian
National University\n\n
DTSTART:20210408T150000Z
DTEND:20210408T160000Z
LAST-MODIFIED:20210113T164501Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-8
END:VEVENT
BEGIN:VEVENT
UID:c0544949-b812-4730-ab97-544634a12efe
DTSTAMP:20210308T215705Z
CREATED:20210107T005109Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210408T200000Z
DTEND:20210408T220000Z
LAST-MODIFIED:20210107T005116Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-10
END:VEVENT
BEGIN:VEVENT
UID:6d9a286c-79f1-4836-be39-f0bbe8a4118f
DTSTAMP:20210308T215705Z
CREATED:20210106T011232Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Adam Harper\n\nAffiliation
: University of Warwick\n\n
DTSTART:20210408T203000Z
DTEND:20210408T213000Z
LAST-MODIFIED:20210218T203100Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-446
END:VEVENT
BEGIN:VEVENT
UID:ea65a26d-a6bc-4b0a-b7ff-d15b2beaca3d
DTSTAMP:20210308T215705Z
CREATED:20210106T022053Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART:20210409T131500Z
DTEND:20210409T144500Z
LAST-MODIFIED:20210208T183621Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-66
END:VEVENT
BEGIN:VEVENT
UID:c98aba1a-7437-4168-b626-4b8d9b483ed3
DTSTAMP:20210308T215705Z
CREATED:20210205T161300Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210409T163000Z
DTEND:20210409T180000Z
LAST-MODIFIED:20210205T164216Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-10
END:VEVENT
BEGIN:VEVENT
UID:6d164a34-16cd-4e41-a003-7754354ed521
DTSTAMP:20210308T215705Z
CREATED:20200110T165817Z
DESCRIPTION:
DTSTART:20210409T220000Z
DTEND:20210409T220000Z
LAST-MODIFIED:20210104T025537Z
LOCATION:
SUMMARY:IAS School of Mathematics Term II Ends
URL:https://www.ias.edu/math/events/ias-school-mathematics-term-ii-ends
END:VEVENT
BEGIN:VEVENT
UID:da3dceee-6ac2-4eb7-8740-b73390a20da1
DTSTAMP:20210308T215705Z
CREATED:20210219T150424Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Daniel DeFelippis\n\nAffiliation: Colum
bia University\n\nEach week\, we hold a relatively informal seminar/discus
sion series\nwith an emphasis on extra-galactic and large-scale structure
\nastrophysics.\n\nDuring Galread a leader/visitor presents a recent paper
to the\ndiscussion group. The PDF of the paper is projected onto a large
\nscreen\, and a guest explains the paper\, section by section\, in greate
r\ndetail than may be explained within the text of the article. To aid\nwi
th discussion\, only the article PDF is presented -- no\npowerpoint-style
slides. Galread discussions are very friendly and\ninteractive.\n
DTSTART:20210412T150000Z
DTEND:20210412T160000Z
LAST-MODIFIED:20210219T150825Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-12
END:VEVENT
BEGIN:VEVENT
UID:5189d0da-a1b0-4967-9a1c-a36049541526
DTSTAMP:20210308T215705Z
CREATED:20201211T183141Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Katrina Legitt\n\nAffiliation: Hebrew U
niversity\n\n
DTSTART:20210412T151500Z
DTEND:20210412T161500Z
LAST-MODIFIED:20210119T232251Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-482
END:VEVENT
BEGIN:VEVENT
UID:f656baca-3b2c-46d3-861c-74102de4e99d
DTSTAMP:20210308T215705Z
CREATED:20210114T152443Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210412T160000Z
DTEND:20210412T170000Z
LAST-MODIFIED:20210219T153825Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-6
END:VEVENT
BEGIN:VEVENT
UID:e8873bda-e5d7-48ba-a2c8-94ea7e849b52
DTSTAMP:20210308T215705Z
CREATED:20210114T150545Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210412T163000Z
DTEND:20210412T180000Z
LAST-MODIFIED:20210219T155414Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-9
END:VEVENT
BEGIN:VEVENT
UID:5f7f47a8-d666-4a00-874f-acd393dd7284
DTSTAMP:20210308T215705Z
CREATED:20210308T160636Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Hao Jia\n\nAffiliation: Uni
versity of Minnesota\n\n
DTSTART:20210412T203000Z
DTEND:20210412T213000Z
LAST-MODIFIED:20210308T161015Z
LOCATION:
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-144
END:VEVENT
BEGIN:VEVENT
UID:5dfc829f-7a12-47aa-b463-2ac2dde98266
DTSTAMP:20210308T215705Z
CREATED:20210201T193518Z
DESCRIPTION:
DTSTART:20210413T163000Z
DTEND:20210413T173000Z
LAST-MODIFIED:20210201T193541Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-9
END:VEVENT
BEGIN:VEVENT
UID:0857076e-a92e-4f76-b7ca-613e4b5a99a7
DTSTAMP:20210308T215705Z
CREATED:20210114T163304Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210413T233000Z
DTEND:20210414T013000Z
LAST-MODIFIED:20210114T163422Z
LOCATION:Virtual Meeting
SUMMARY:Amateur Astronomers Association of Princeton (AAAP) Monthly Meeting
URL:https://www.ias.edu/sns/events/amateur-astronomers-association-princeto
n-aaap-monthly-meeting-4
END:VEVENT
BEGIN:VEVENT
UID:d28d72ee-bc0c-40b4-ae29-768045722e5c
DTSTAMP:20210308T215705Z
CREATED:20210115T144306Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Jaime Pineda\n\nAffiliation: Max Planck
Institute for Extraterrestrial Physics\, Garching\n\n
DTSTART:20210414T150000Z
DTEND:20210414T160000Z
LAST-MODIFIED:20210115T154058Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Star Formation/ISM Rendezvous (SFIR)
URL:https://www.ias.edu/sns/events/princeton-university-star-formationism-r
endezvous-sfir
END:VEVENT
BEGIN:VEVENT
UID:19123354-0922-4467-adc2-a6967873dbf6
DTSTAMP:20210308T215705Z
CREATED:20200922T211239Z
DESCRIPTION:Topic: Bibliotheca arabica\n\nSPEAKERS:\nVERENA KLEMM (Institut
e of Arabic Studies\, University of Leipzig\,\nGermany)\nSTEFANIE BRINKMAN
N(Sächsische Akademie der Wissenschaften zu Leipzig)\nBORIS LIEBRENZ (Säch
sische Akademie der Wissenschaften zu Leipzig)\nTHOMAS EFER (Sächsische Ak
ademie der Wissenschaften zu Leipzig)\n\nRegister in advance for this webi
nar here\n[https://theias.zoom.us/webinar/register/WN_7TPbcHWTS-2oJr4LhD4O
Iw].\nAfter registering\, you will receive a confirmation email containing
\ninformation about joining the webinar.\n
DTSTART:20210414T160000Z
DTEND:20210414T173000Z
LAST-MODIFIED:20210305T162918Z
LOCATION:Webinar
SUMMARY:Near Eastern Studies and Digital Scholarship @IAS Joint Lecture
URL:https://www.ias.edu/events/near-eastern-studies-and-digital-scholarship
-ias-joint-lecture
END:VEVENT
BEGIN:VEVENT
UID:bc1050a1-9818-40a3-aed2-071a4bfa54e4
DTSTAMP:20210308T215705Z
CREATED:20210113T164511Z
DESCRIPTION:Topic: Constraints to ultralight axion dark matter particles ma
ss: the effect of self-interactions. \n\nSpeakers: Alma González-Morales
\n\nAffiliation: Universidad de Guanajuato\n\n
DTSTART:20210415T150000Z
DTEND:20210415T160000Z
LAST-MODIFIED:20210119T180102Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-15
END:VEVENT
BEGIN:VEVENT
UID:1718d5b3-ff08-489c-96d1-d6246ff08ce4
DTSTAMP:20210308T215705Z
CREATED:20210205T161319Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210416T163000Z
DTEND:20210416T180000Z
LAST-MODIFIED:20210205T164124Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-11
END:VEVENT
BEGIN:VEVENT
UID:77466946-d3b1-4c6a-82ea-5ca220c29808
DTSTAMP:20210308T215705Z
CREATED:20210226T013348Z
DESCRIPTION:Topic: From geometry to topology: inverse theorems for distribu
ted persistence\n\nSpeakers: Paul Bendich\n\nAffiliation: Duke University
\n\nWhat is the 'right' topological invariant of a large point cloud $X$?
\nPrior research has focused on estimating the full persistence diagram\no
f $X$\, a quantity that is very expensive to compute\, unstable to\noutlie
rs\, and far from a sufficient statistic. We therefore propose\nthat the c
orrect invariant is not the persistence diagram of $X$\, but\nrather the c
ollection of persistence diagrams of many small subsets.\nThis invariant\,
which we call 'distributed persistence\,' is trivially\nparallelizable\,
more stable to outliers\, and has a rich inverse\ntheory. The map from the
space of point clouds (with the\nquasi-isometry metric) to the space of d
istributed persistence\ninvariants (with the Hausdorff-Bottleneck distance
) is a global\nquasi-isometry. This is a much stronger property than simpl
y being\ninjective\, as it implies that the inverse of a small neighborhoo
d is a\nsmall neighborhood\, and is to our knowledge the only result of it
s\nkind in the TDA literature. Moreover\, the quasi-isometry bounds depend
\non the size of the subsets taken\, so that as the size of these subsets
\ngoes from small to large\, the invariant interpolates between a purely\n
geometric one and a topological one. Finally\, we note that our inverse\nr
esults do not actually require considering all subsets of a fixed\nsize (a
n enormous collection)\, but a relatively small collection\nsatisfying cer
tain covering properties that arise with high\nprobability when randomly s
ampling subsets. These theoretical results\nare complemented by two synthe
tic experiments demonstrating the use of\ndistributed persistence in pract
ice. This is joint work with Elchanan\nSolomon and Alexander Wagner.\n
DTSTART:20210416T180000Z
DTEND:20210416T190000Z
LAST-MODIFIED:20210226T013423Z
LOCATION:Remote Access
SUMMARY:Workshop on Topology: Identifying Order in Complex Systems
URL:https://www.ias.edu/math/events/workshop-topology-identifying-order-com
plex-systems-134
END:VEVENT
BEGIN:VEVENT
UID:0fc1cfe7-7a71-4298-8b4e-0cbda2c19efb
DTSTAMP:20210308T215705Z
CREATED:20210115T163015Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210416T190000Z
DTEND:20210416T200000Z
LAST-MODIFIED:20210115T163150Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-8
END:VEVENT
BEGIN:VEVENT
UID:2bd72fd0-e960-4dd3-9566-a421801a4613
DTSTAMP:20210308T215705Z
CREATED:20210114T152525Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210419T160000Z
DTEND:20210419T170000Z
LAST-MODIFIED:20210219T153855Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-7
END:VEVENT
BEGIN:VEVENT
UID:aeac29bb-bdce-46d9-8316-b47b3ee717e9
DTSTAMP:20210308T215705Z
CREATED:20210114T150616Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Zachary Slepian\n\n
DTSTART:20210419T163000Z
DTEND:20210419T180000Z
LAST-MODIFIED:20210219T155508Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-10
END:VEVENT
BEGIN:VEVENT
UID:818275d4-2649-4ec7-b556-c93816f1c167
DTSTAMP:20210308T215705Z
CREATED:20201123T163627Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Nike Sun\n\nAffiliation: Massachusetts
Institute of Technology\n\n
DTSTART:20210419T190000Z
DTEND:20210419T200000Z
LAST-MODIFIED:20210302T194222Z
LOCATION:Remote Access
SUMMARY:Marston Morse Lectures
URL:https://www.ias.edu/math/events/marston-morse-lectures
END:VEVENT
BEGIN:VEVENT
UID:3363a7e7-768f-4dbe-ac24-cca6f8793553
DTSTAMP:20210308T215705Z
CREATED:20210201T193553Z
DESCRIPTION:
DTSTART:20210420T163000Z
DTEND:20210420T173000Z
LAST-MODIFIED:20210201T193613Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-10
END:VEVENT
BEGIN:VEVENT
UID:e783ba0d-af0c-4783-998b-d31e232818a9
DTSTAMP:20210308T215705Z
CREATED:20210302T194233Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Nike Sun\n\nAffiliation: Massachusetts
Institute of Technology\n\n
DTSTART:20210421T190000Z
DTEND:20210421T200000Z
LAST-MODIFIED:20210302T194252Z
LOCATION:Remote Access
SUMMARY:Marston Morse Lectures
URL:https://www.ias.edu/math/events/marston-morse-lectures-98
END:VEVENT
BEGIN:VEVENT
UID:db16d2e0-abf9-4c85-9494-2a1956cc8634
DTSTAMP:20210308T215705Z
CREATED:20210113T163053Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210422T150000Z
DTEND:20210422T160000Z
LAST-MODIFIED:20210114T135819Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-0
END:VEVENT
BEGIN:VEVENT
UID:8003697e-d695-4ecf-b9ce-96c2ea599b0e
DTSTAMP:20210308T215705Z
CREATED:20210114T170125Z
DESCRIPTION:Topic: The VINTERGATAN project: towards understanding the origi
ns of the Milky Way\n\nSpeakers: Oscar Agertz\n\nAffiliation: Lund Univers
ity\n\n
DTSTART:20210422T173000Z
DTEND:20210422T183000Z
LAST-MODIFIED:20210114T171250Z
LOCATION:Virtual Meeting
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
2
END:VEVENT
BEGIN:VEVENT
UID:0531bbda-d2d9-4b78-8e94-85d4af58e9e7
DTSTAMP:20210308T215705Z
CREATED:20210205T161343Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210423T163000Z
DTEND:20210423T180000Z
LAST-MODIFIED:20210205T164148Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-12
END:VEVENT
BEGIN:VEVENT
UID:f9830e66-40d9-423b-bdf7-ca68cb580ffb
DTSTAMP:20210308T215705Z
CREATED:20210302T194306Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Nike Sun\n\nAffiliation: Massachusetts
Institute of Technology\n\n
DTSTART:20210423T190000Z
DTEND:20210423T200000Z
LAST-MODIFIED:20210302T194333Z
LOCATION:Remote Access
SUMMARY:Marston Morse Lectures
URL:https://www.ias.edu/math/events/marston-morse-lectures-99
END:VEVENT
BEGIN:VEVENT
UID:065754a2-6ef3-4c6b-a102-eeca46470c47
DTSTAMP:20210308T215705Z
CREATED:20210114T152550Z
DESCRIPTION:Topic: TBA\n\nSpeakers: David Ehrenreich\n\n
DTSTART:20210426T160000Z
DTEND:20210426T170000Z
LAST-MODIFIED:20210219T153947Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-8
END:VEVENT
BEGIN:VEVENT
UID:c2392d0f-8ebc-4dbc-933b-eb049d856a78
DTSTAMP:20210308T215705Z
CREATED:20210114T150643Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210426T163000Z
DTEND:20210426T180000Z
LAST-MODIFIED:20210219T155544Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-11
END:VEVENT
BEGIN:VEVENT
UID:65f2c241-a38e-443b-b5f6-a0e5d80f4636
DTSTAMP:20210308T215705Z
CREATED:20210201T193626Z
DESCRIPTION:
DTSTART:20210427T163000Z
DTEND:20210427T173000Z
LAST-MODIFIED:20210201T193646Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-11
END:VEVENT
BEGIN:VEVENT
UID:c2377186-d5ab-451e-aeaf-4b82eef9d900
DTSTAMP:20210308T215705Z
CREATED:20210113T164711Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Jennifer Barnes\n\nAffiliation: Columbi
a University\n\n
DTSTART:20210429T150000Z
DTEND:20210429T160000Z
LAST-MODIFIED:20210113T164759Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-9
END:VEVENT
BEGIN:VEVENT
UID:2adccfe4-d415-42a2-94d1-8315d77f2419
DTSTAMP:20210308T215705Z
CREATED:20210205T161408Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210430T163000Z
DTEND:20210430T180000Z
LAST-MODIFIED:20210205T164104Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-13
END:VEVENT
BEGIN:VEVENT
UID:84e37df0-a7ca-4b34-bc4e-b250f56f6c79
DTSTAMP:20210308T215705Z
CREATED:20210226T013428Z
DESCRIPTION:Topic: Twisted topological tangles or: the knot theory of knitt
ing\n\nSpeakers: Elisabetta Matsumoto\n\nAffiliation: Georgia Institute of
Technology\n\nThe Picard group of the stable module category of a finite
group plays\na role in many parts of modular representation theory. It was
\ncalculated when the group is an abelian $p$-group\, by pioneering work\n
of Dade in the 1970's\, and a classification for all $p$-groups was\nobtai
ned by Carlson-Thevenaz in the early 2000's in a series of works.\nIn my t
alk I'll explain how to use methods from homotopy theory and\nhigher algeb
ra to describe this Picard group for an arbitrary finite\ngroup $G$. Part
of this talk is joint work with Tobias Barthel and\nJoshua Hunt.\n
DTSTART:20210430T180000Z
DTEND:20210430T190000Z
LAST-MODIFIED:20210226T013629Z
LOCATION:Remote Access
SUMMARY:Workshop on Topology: Identifying Order in Complex Systems
URL:https://www.ias.edu/math/events/workshop-topology-identifying-order-com
plex-systems-135
END:VEVENT
BEGIN:VEVENT
UID:a79270a8-2df5-4cca-b080-f2e7b8b52d58
DTSTAMP:20210308T215705Z
CREATED:20210115T163200Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210430T190000Z
DTEND:20210430T200000Z
LAST-MODIFIED:20210115T163227Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-9
END:VEVENT
BEGIN:VEVENT
UID:8ce02019-58cb-41f3-8a30-f2ab07275d61
DTSTAMP:20210308T215705Z
CREATED:20210114T152615Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210503T160000Z
DTEND:20210503T170000Z
LAST-MODIFIED:20210219T154012Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-12
END:VEVENT
BEGIN:VEVENT
UID:2cf678b6-45e1-4fb1-add1-f5b2a6ac3642
DTSTAMP:20210308T215705Z
CREATED:20210114T150715Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Adam Amara\n\n
DTSTART:20210503T163000Z
DTEND:20210503T180000Z
LAST-MODIFIED:20210219T160038Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-13
END:VEVENT
BEGIN:VEVENT
UID:4e820ffb-d986-4dd8-9952-2396af4236a2
DTSTAMP:20210308T215705Z
CREATED:20210113T164808Z
DESCRIPTION:Topic: Powerful Activity in Galaxies - the Wonder Years (aka Ge
neration Alpha)\n\nSpeakers: Steffi Baum\n\nAffiliation: University of Man
itoba\n\n
DTSTART:20210506T150000Z
DTEND:20210506T160000Z
LAST-MODIFIED:20210119T175956Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-13
END:VEVENT
BEGIN:VEVENT
UID:6b053fe1-0803-4f7f-b621-5d794a89777d
DTSTAMP:20210308T215705Z
CREATED:20210205T161437Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210507T163000Z
DTEND:20210507T180000Z
LAST-MODIFIED:20210205T164041Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-14
END:VEVENT
BEGIN:VEVENT
UID:8275c62f-c656-49c1-9ac5-2948ed125893
DTSTAMP:20210308T215705Z
CREATED:20210219T150837Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Bhawna Motwani\n\nAffiliation: Columbia
University\n\nEach week\, we hold a relatively informal seminar/discussio
n series\nwith an emphasis on extra-galactic and large-scale structure\nas
trophysics.\n\nDuring Galread a leader/visitor presents a recent paper to
the\ndiscussion group. The PDF of the paper is projected onto a large\nscr
een\, and a guest explains the paper\, section by section\, in greater\nde
tail than may be explained within the text of the article. To aid\nwith di
scussion\, only the article PDF is presented -- no\npowerpoint-style slide
s. Galread discussions are very friendly and\ninteractive.\n
DTSTART:20210510T150000Z
DTEND:20210510T160000Z
LAST-MODIFIED:20210219T151437Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-13
END:VEVENT
BEGIN:VEVENT
UID:b25881c6-6db0-44a1-b26d-e3104e8edecb
DTSTAMP:20210308T215705Z
CREATED:20210114T152756Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210510T160000Z
DTEND:20210510T170000Z
LAST-MODIFIED:20210219T154037Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-13
END:VEVENT
BEGIN:VEVENT
UID:8052e980-46a4-4331-a14c-00577265825e
DTSTAMP:20210308T215705Z
CREATED:20210114T150746Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210510T163000Z
DTEND:20210510T180000Z
LAST-MODIFIED:20210219T155951Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-14
END:VEVENT
BEGIN:VEVENT
UID:0a8a1581-f441-47bb-acf2-c4073bc9077e
DTSTAMP:20210308T215705Z
CREATED:20210114T163641Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210511T233000Z
DTEND:20210512T013000Z
LAST-MODIFIED:20210114T163700Z
LOCATION:Virtual Meeting
SUMMARY:Amateur Astronomers Association of Princeton (AAAP) Monthly Meeting
URL:https://www.ias.edu/sns/events/amateur-astronomers-association-princeto
n-aaap-monthly-meeting-5
END:VEVENT
BEGIN:VEVENT
UID:d96c892b-4d4f-4eb0-983d-e0bf1d1900f8
DTSTAMP:20210308T215705Z
CREATED:20210113T164856Z
DESCRIPTION:Topic: Physics of Enigmatic Fast Radio Bursts\n\nSpeakers: Pawa
n Kumar\n\nAffiliation: University of Texas\n\nFast radio bursts (FRBs) ar
e short duration (~ms)\, very bright\, radio\ntransients. Their detection
in 2007 was a major unexpected discovery\nin astronomy in decades. Hunting
for FRBs and measuring their physical\nproperties have become one of the
leading scientific goals in\nastronomy. It is now well established that ma
ny FRBs are located at a\ndistance of several billion lightyears\, and the
refore they are the\nbrightest known transients in the universe in the rad
io band. Using\nvery general arguments\, I will show that the radio emissi
on is\ncoherent\, the magnetic field strength associated with the source o
f\nthese events should be 10^{14}Gauss or more. Recently\, an FRB was\ndis
covered in the Galaxy and it confirmed that at least some FRBs are\nassoci
ated with magnetars. I will describe my recent work that\ndisturbances clo
se to the surface of a magnetar launch Alfven waves\ninto the magnetospher
e\, which propagate to a distance of a few tens of\nneutron star radii and
then produce coherent radio emission. The\ncoincident hard X-rays associa
ted with the Galactic-FRB can be\nunderstood in this scenario. This model
provides a unified picture for\nweak Galactic FRBs as well as the bright b
ursts seen at cosmological\ndistances.\n
DTSTART:20210513T150000Z
DTEND:20210513T160000Z
LAST-MODIFIED:20210129T180907Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-10
END:VEVENT
BEGIN:VEVENT
UID:337e9763-d3b3-43bd-9672-c62da176345c
DTSTAMP:20210308T215705Z
CREATED:20210205T161510Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Anna Tenerani\n\nAffiliation: Universit
y of Texas\, Austin\n\n
DTSTART:20210514T163000Z
DTEND:20210514T180000Z
LAST-MODIFIED:20210205T163443Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-15
END:VEVENT
BEGIN:VEVENT
UID:17b08816-fa29-473d-9d01-8bfc95d4bb14
DTSTAMP:20210308T215705Z
CREATED:20210115T163235Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210514T190000Z
DTEND:20210514T200000Z
LAST-MODIFIED:20210115T163257Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-10
END:VEVENT
BEGIN:VEVENT
UID:71d3f130-3506-43d0-828e-9ec2f4bb42ed
DTSTAMP:20210308T215705Z
CREATED:20210114T143004Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Allison Strom\n\nAffiliation: Princeton
University\n\nEach week\, we hold a relatively informal seminar/discussio
n series\nwith an emphasis on extra-galactic and large-scale structure\nas
trophysics.\n\nDuring Galread a leader/visitor presents a recent paper to
the\ndiscussion group. The PDF of the paper is projected onto a large\nscr
een\, and a guest explains the paper\, section by section\, in greater\nde
tail than may be explained within the text of the article. To aid\nwith di
scussion\, only the article PDF is presented -- no\npowerpoint-style slide
s. Galread discussions are very friendly and\ninteractive.\n
DTSTART:20210517T150000Z
DTEND:20210517T160000Z
LAST-MODIFIED:20210114T143120Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-9
END:VEVENT
BEGIN:VEVENT
UID:aa8a84a5-2eb4-491b-add3-7b9ed02599f0
DTSTAMP:20210308T215705Z
CREATED:20210114T152819Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210517T160000Z
DTEND:20210517T170000Z
LAST-MODIFIED:20210219T154054Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-14
END:VEVENT
BEGIN:VEVENT
UID:326db495-406b-4387-9daf-2733e6661207
DTSTAMP:20210308T215705Z
CREATED:20210114T150821Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Hayden Lee\n\n
DTSTART:20210517T163000Z
DTEND:20210517T180000Z
LAST-MODIFIED:20210219T155945Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-15
END:VEVENT
BEGIN:VEVENT
UID:d904b90f-8bdf-44a8-8556-449c1fd75f1a
DTSTAMP:20210308T215705Z
CREATED:20210113T165106Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210520T150000Z
DTEND:20210520T160000Z
LAST-MODIFIED:20210113T165130Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-11
END:VEVENT
BEGIN:VEVENT
UID:88dae82a-ae03-40f1-9de6-0afed0aaf53a
DTSTAMP:20210308T215705Z
CREATED:20210205T161533Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210521T163000Z
DTEND:20210521T180000Z
LAST-MODIFIED:20210205T164020Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-16
END:VEVENT
BEGIN:VEVENT
UID:739fa864-8945-422e-8714-9af712caf12a
DTSTAMP:20210308T215705Z
CREATED:20210219T151050Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Meng Gu\n\nAffiliation: Princeton Unive
rsity\n\nEach week\, we hold a relatively informal seminar/discussion seri
es\nwith an emphasis on extra-galactic and large-scale structure\nastrophy
sics.\n\nDuring Galread a leader/visitor presents a recent paper to the\nd
iscussion group. The PDF of the paper is projected onto a large\nscreen\,
and a guest explains the paper\, section by section\, in greater\ndetail t
han may be explained within the text of the article. To aid\nwith discussi
on\, only the article PDF is presented -- no\npowerpoint-style slides. Gal
read discussions are very friendly and\ninteractive.\n
DTSTART:20210524T150000Z
DTEND:20210524T160000Z
LAST-MODIFIED:20210219T151720Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-14
END:VEVENT
BEGIN:VEVENT
UID:30c6966d-129f-48a5-8386-097c4796247d
DTSTAMP:20210308T215705Z
CREATED:20210114T152842Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210524T160000Z
DTEND:20210524T170000Z
LAST-MODIFIED:20210219T154126Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-15
END:VEVENT
BEGIN:VEVENT
UID:466d8957-d61d-4060-bdf5-77c7f1ee9516
DTSTAMP:20210308T215705Z
CREATED:20210114T150846Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Cora Dvorkin\n\n
DTSTART:20210524T163000Z
DTEND:20210524T180000Z
LAST-MODIFIED:20210219T155921Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-12
END:VEVENT
BEGIN:VEVENT
UID:dbd3f18e-0ee1-4646-9313-59b58fb55f3e
DTSTAMP:20210308T215705Z
CREATED:20210113T165141Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210527T150000Z
DTEND:20210527T160000Z
LAST-MODIFIED:20210113T165203Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-12
END:VEVENT
BEGIN:VEVENT
UID:0f87e17e-f03e-46af-8550-e6f87701a20d
DTSTAMP:20210308T215705Z
CREATED:20210205T161559Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210528T163000Z
DTEND:20210528T180000Z
LAST-MODIFIED:20210205T163958Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-17
END:VEVENT
BEGIN:VEVENT
UID:6925a506-5df0-4f1e-8d93-8f999028c522
DTSTAMP:20210308T215705Z
CREATED:20210115T163306Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210528T190000Z
DTEND:20210528T200000Z
LAST-MODIFIED:20210115T163326Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/sns/events/princeton-university-hsc-group-discussio
n-11
END:VEVENT
BEGIN:VEVENT
UID:f7c283b3-046f-4213-877c-582e7e7af276
DTSTAMP:20210308T215705Z
CREATED:20210114T162446Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210608T233000Z
DTEND:20210609T013000Z
LAST-MODIFIED:20210114T163739Z
LOCATION:Virtual Meeting
SUMMARY:Amateur Astronomers Association of Princeton (AAAP) Monthly Meeting
URL:https://www.ias.edu/sns/events/amateur-astronomers-association-princeto
n-aaap-monthly-meeting-1
END:VEVENT
BEGIN:VEVENT
UID:d3bcf56f-9701-4f41-a697-6a5e4033a3d9
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20210907T161500Z
DTEND:20210907T180000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-112
END:VEVENT
BEGIN:VEVENT
UID:471208a5-4d1f-4ae0-9ae2-6f7e92b95923
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20210914T161500Z
DTEND:20210914T180000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-123
END:VEVENT
BEGIN:VEVENT
UID:f01a75a5-df9c-43bb-955f-47aa9c85536b
DTSTAMP:20210308T215705Z
CREATED:20200110T181253Z
DESCRIPTION:
DTSTART:20210920T130000Z
DTEND:20210920T130000Z
LAST-MODIFIED:20210104T025634Z
LOCATION:
SUMMARY:IAS School of Mathematics Term I Begins
URL:https://www.ias.edu/math/events/ias-school-mathematics-term-i-begins-0
END:VEVENT
BEGIN:VEVENT
UID:71be3068-d438-431d-8d6a-8a18a41b4424
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20210921T161500Z
DTEND:20210921T180000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-124
END:VEVENT
BEGIN:VEVENT
UID:c55b90df-ce3a-41b1-8f38-086a1f679f18
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20210928T161500Z
DTEND:20210928T180000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-126
END:VEVENT
BEGIN:VEVENT
UID:50498242-8ce8-42d7-b8fb-828375e38436
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211005T161500Z
DTEND:20211005T180000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-127
END:VEVENT
BEGIN:VEVENT
UID:0d056de6-8b89-4858-ad24-3a5d4f5e7fdb
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211012T161500Z
DTEND:20211012T180000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-128
END:VEVENT
BEGIN:VEVENT
UID:29abfd1e-0afe-42d6-9fd0-a1fa2ff8af18
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211019T161500Z
DTEND:20211019T180000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-129
END:VEVENT
BEGIN:VEVENT
UID:002fe7a9-2e4c-4afb-99a9-32862115acd6
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211026T161500Z
DTEND:20211026T180000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-130
END:VEVENT
BEGIN:VEVENT
UID:2002619c-9ecc-41c6-b4c5-b6af041726ce
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211102T161500Z
DTEND:20211102T180000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-145
END:VEVENT
BEGIN:VEVENT
UID:bfbc4264-e845-4ef9-b515-387accd3d1b6
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211109T171500Z
DTEND:20211109T190000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-146
END:VEVENT
BEGIN:VEVENT
UID:7aafabf5-48b6-4fd6-aa7f-0f1ebd53983b
DTSTAMP:20210308T215705Z
CREATED:20201216T220256Z
DESCRIPTION:Topic: Ignaz Goldziher and his Correspondents: Islamic and Jewi
sh Studies around the Turn of the Twentieth Century\n\nCONVENORS:\nHans-Jü
rgen Becker (Georg-August-Universität Göttingen)\nKinga Dévényi (Corvinus
University of Budapest\, and The Oriental\nCollection of the Library of th
e Hungarian Academy of Sciences)\nSebastian Günther (Georg-August-Universi
tät Göttingen)\nSabine Schmidtke (Institute for Advanced Study\, Princeton
NJ)\n\nCONFERENCE LOCATION:\nDepending on the situation in fall 2021\, th
e conference will either be\nheld virtually\, in person or hybrid in Götti
ngen.\n\nThis international conference takes place within the framework of
the\nAlexander-von-Humboldt Research Prize.\n
DTSTART:20211112T140000Z
DTEND:20211112T140000Z
LAST-MODIFIED:20201216T223254Z
LOCATION:
SUMMARY:Near Eastern Studies Conference
URL:https://www.ias.edu/hs/events/near-eastern-studies-conference
END:VEVENT
BEGIN:VEVENT
UID:dbdcf2e1-d553-4ed9-a8bd-7bfb81479411
DTSTAMP:20210308T215705Z
CREATED:20201216T220256Z
DESCRIPTION:Topic: Ignaz Goldziher and his Correspondents: Islamic and Jewi
sh Studies around the Turn of the Twentieth Century\n\nCONVENORS:\nHans-Jü
rgen Becker (Georg-August-Universität Göttingen)\nKinga Dévényi (Corvinus
University of Budapest\, and The Oriental\nCollection of the Library of th
e Hungarian Academy of Sciences)\nSebastian Günther (Georg-August-Universi
tät Göttingen)\nSabine Schmidtke (Institute for Advanced Study\, Princeton
NJ)\n\nCONFERENCE LOCATION:\nDepending on the situation in fall 2021\, th
e conference will either be\nheld virtually\, in person or hybrid in Götti
ngen.\n\nThis international conference takes place within the framework of
the\nAlexander-von-Humboldt Research Prize.\n
DTSTART:20211113T140000Z
DTEND:20211113T140000Z
LAST-MODIFIED:20201216T223254Z
LOCATION:
SUMMARY:Near Eastern Studies Conference
URL:https://www.ias.edu/hs/events/near-eastern-studies-conference
END:VEVENT
BEGIN:VEVENT
UID:61e9db0a-b23c-46af-875c-dbdc0e37948f
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211116T171500Z
DTEND:20211116T190000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-147
END:VEVENT
BEGIN:VEVENT
UID:b5732dd4-c759-4435-94b8-ae57eb0665fe
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211123T171500Z
DTEND:20211123T190000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-148
END:VEVENT
BEGIN:VEVENT
UID:91dd7f08-bf48-496f-8513-ae7e960b6883
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211130T171500Z
DTEND:20211130T190000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-149
END:VEVENT
BEGIN:VEVENT
UID:3b9e253a-3091-485d-99a9-2be25fa8410d
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211207T171500Z
DTEND:20211207T190000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-150
END:VEVENT
BEGIN:VEVENT
UID:fd9b23d1-fe97-4595-a378-a4b31494e2b5
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211214T171500Z
DTEND:20211214T190000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-151
END:VEVENT
BEGIN:VEVENT
UID:496d7529-464f-4ada-9b3b-d5fe4be85b97
DTSTAMP:20210308T215705Z
CREATED:20200110T181356Z
DESCRIPTION:
DTSTART:20211217T230000Z
DTEND:20211217T230000Z
LAST-MODIFIED:20210104T025731Z
LOCATION:
SUMMARY:IAS School of Mathematics Term I Ends
URL:https://www.ias.edu/math/events/ias-school-mathematics-term-i-ends-0
END:VEVENT
BEGIN:VEVENT
UID:8d3db9c6-f163-4a79-95b9-8b3ac855cb82
DTSTAMP:20210308T215705Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART:20211221T171500Z
DTEND:20211221T190000Z
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-152
END:VEVENT
BEGIN:VEVENT
UID:6f6ecf82-11ae-4ee0-bfaa-bb03a913c5c4
DTSTAMP:20210308T215705Z
CREATED:20200110T181450Z
DESCRIPTION:
DTSTART:20220110T140000Z
DTEND:20220110T140000Z
LAST-MODIFIED:20210104T025827Z
LOCATION:
SUMMARY:IAS School of Mathematics Term II Begins
URL:https://www.ias.edu/math/events/ias-school-mathematics-term-ii-begins-0
END:VEVENT
END:VCALENDAR