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UID:3c2a1a93-0783-4354-94f3-3a68086ad150
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X-WR-CALNAME:IAS Academic
BEGIN:VEVENT
UID:a2386bc7-94a4-4a43-a013-c83e91a724d1
DTSTAMP:20210622T223733Z
CREATED:20210219T144305Z
DESCRIPTION:Topic: Mass-to-light Ratios of Spatially Resolved Stellar Popul
ations in M31\n\nSpeakers: Grace Telford\n\nAffiliation: Rutgers Universit
y\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:20210322T150000Z
DTEND:20210322T160000Z
LAST-MODIFIED:20210317T140000Z
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:f6574dc7-afd4-4d3f-b96b-06f759d972a7
DTSTAMP:20210622T223733Z
CREATED:20201211T183006Z
DESCRIPTION:Topic: The abstract chromatic number\n\nSpeakers: Leonardo Naga
mi Coregliano\n\nAffiliation: University of Chicago\n\nWhat edge density o
f a graph guarantees that that it will contain a\nparticular subgraph? Or
one of a given family $\mathcal{F}$ of\nsubgraphs? The celebrated Erdős--S
tone--Simonovits Theorem\ncharacterizes the maximum edge density in $\math
cal{F}$-free graphs\,\nin terms of the minimum {\em chromatic number} of a
ny graph in the\nfamily $\mathcal{F}$. More recently\, generalizations of
this theorem\nfor ordered graphs\, cyclically ordered graphs\, edge-ordere
d graphs\,\netc. were shown in terms of appropriately defined chromatic nu
mbers.\n\nIn a recent joint work with A. Razborov\, we proved an analogue
of this\ntheorem in the general setting of 'graphs with an arbitrary extra
\nstructure' (formally\, these are encoded by an open interpretation from
\nthe theory of graphs to some universal first-order theory $T$) in\nterms
of an {\em abstract chromatic number}. However\, as its name\nsuggests\,
the initial formula for this abstract chromatic number is so\nabstract tha
t its computability was left as an open question.\n\nIn this talk\, I will
present this generalization of the\nErdős--Stone--Simonovits Theorem\, an
d an alternative formula for the\nabstract chromatic number based on a par
tite version of Ramsey's\nTheorem. This implies the computability of the a
bstract chromatic\nnumber when the underlying universal first-order theory
$T$ is\nfinitely axiomatizable.\n\nThis lecture will require no special b
ackground knowledge.\n
DTSTART:20210322T151500Z
DTEND:20210322T161500Z
LAST-MODIFIED:20210322T114206Z
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:498e5411-505c-47a0-8e93-d86dbc7f7346
DTSTAMP:20210622T223733Z
CREATED:20210114T152306Z
DESCRIPTION:Topic: Exo-Jupiters: The Movers and Shakers of Planetary System
s\n\nSpeakers: Marta Bryan\n\nAffiliation: University of California\, Berk
eley\n\nOver the past two decades thousands of planets with an extraordina
ry\ndiversity of properties have been discovered orbiting nearby\nstars.
Of those new planets\, gas giant analogs to our own Jupiter\nand Saturn ar
e the easiest products of the planet formation process to\nfind – they are
bigger and brighter and more massive. This means\nthat gas giants can be
characterized in unique ways to explore their\nformation histories. In a
ddition\, gas giants are so massive that\nthey dominate the dynamics of th
eir own systems. So gas giants are\nan obvious place to start if we want
to learn about the physics of\nplanet formation. In this talk I will desc
ribe my work using a wide\nrange of observational techniques to explore ho
w gas giants form and\nevolve. I will constrain formation histories by me
asuring spins and\nobliquities of gas giant planets. I will then discuss
how outer gas\ngiants shape inner architectures of planetary systems by ca
lculating\nthe frequency of Jupiter analogs in systems hosting different\n
populations of inner planets. \n
DTSTART:20210322T160000Z
DTEND:20210322T170000Z
LAST-MODIFIED:20210319T123938Z
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:fa5667a3-594f-41e5-ac97-24b1fb18c008
DTSTAMP:20210622T223733Z
CREATED:20210114T150412Z
DESCRIPTION:Topic: Topic 1: Strong Lensing of Gravitational Waves Topic 2:
Beyond Perturbation Theory in Inflation \n\nSpeakers: Macarena Lagos and P
aolo Creminelli\n\nAffiliation: Columbia University and International Cent
re for Theoretical Physics (ICTP)\n\nAbstract 1: Gravitational waves (GWs)
are novel signals that probe the\nbehavior of gravity in both the strong
and weak-field regimes. As\nthese waves propagate towards us over cosmolog
ical distance\, they are\nsensitive to the presence of inhomogeneities in
the Universe. \nSimilarly to light\, GWs can be lensed by intervening gala
xies or\nclusters of galaxies\, and lead to multiple magnified and delayed
\nimages from the same source. One important difference with light\nthough
is that the detection of GWs is sensitive to the phase of the\nwave\, whi
ch can change from emission to detection due to\nstrong lensing. In this t
alk I will discuss what this change of phase\nis\, how it can affect futur
e observations\, and how it can be used as a\nunique effect to help identi
fy GW lensed events. \n\nAbstract 2: Inflationary perturbations are approx
imately Gaussian and\ndeviations from Gaussianity are usually calculated u
sing in-in\nperturbation theory. This method\, however\, fails for unlikel
y events\non the tail of the probability distribution: in this regime\nnon
-Gaussianities are important and perturbation theory breaks down. I\nshow
that this regime is amenable to a semiclassical treatment. In\nthis limit
the wavefunction of the Universe can be calculated in\nsaddle-point\, corr
esponding to a resummation of all the tree-level\nWitten diagrams. The sad
dle can be found by solving numerically the\nclassical (Euclidean) non-lin
ear equations of motion\, with prescribed\nboundary conditions. I apply th
ese ideas to a model with a quartic\ninflaton self-interaction. Numerical
and analytical methods show that\nthe tail of the probability distribution
of the curvature perturbation\nhas a clear non-perturbative dependence on
the coupling. These results\nare relevant for the calculation of the abun
dance of primordial black\nholes.\n
DTSTART:20210322T163000Z
DTEND:20210322T180000Z
LAST-MODIFIED:20210317T134409Z
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:d72336ce-0071-4855-bcb4-d740ed1e3e59
DTSTAMP:20210622T223733Z
CREATED:20201209T231731Z
DESCRIPTION:Topic: String topology and the intersection product\n\nSpeakers
: Nathalie Wahl\n\nAffiliation: University of Copenhagen\; Member\, School
of Mathematics\n\nString topology\, as introduced by Chas and Sullivan 20
years ago\, is a\nproduct structure on the free loop space of a manifold
that lifts the\nclassical intersection product from the manifold to its lo
op space.\nI’ll explain how both a product and a coproduct can be defined
by\nlifting the intersection product\, and how this leads to a very rich\n
structure that we still do not fully understand.\n
DTSTART:20210322T180000Z
DTEND:20210322T190000Z
LAST-MODIFIED:20210322T141634Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Colloquium
URL:https://www.ias.edu/math/events/members-colloquium
END:VEVENT
BEGIN:VEVENT
UID:3e84647a-e5fe-47d8-9972-0b619fdb9174
DTSTAMP:20210622T223733Z
CREATED:20210105T212101Z
DESCRIPTION:Topic: A stationary set method for estimating oscillatory integ
rals\n\nSpeakers: Ruixiang Zhang\n\nAffiliation: University of Wisconsin-M
adison\; Member\, School of Mathematics\n\nGiven a polynomial $P$ of const
ant degree in $d$ variables and\nconsider the oscillatory integral \[I_P =
\int_{[0\,1]^d} e(P(\xi)) \,\n\mathrm{d}\xi.\] Assuming the number $d$ of
variables is also fixed\,\nwhat is a good upper bound of $|I_P|$? In this
talk\, I will introduce\na ``stationary set'' method that gives an upper
bound with simple\ngeometric meaning. The proof of this bound mainly relie
s on the theory\nof o-minimal structures. As an application of our bound\,
we obtain the\nsharp convergence exponent in the two dimensional Tarry's
problem for\nevery degree via additional analysis on stationary sets. Cons
equently\,\nwe also prove the sharp $L^{\infty} \to L^p$ Fourier extension
\nestimates for every two dimensional Parsell-Vinogradov surface\nwhenever
the endpoint of the exponent $p$ is even. This is joint work\nwith Saugat
a Basu\, Shaoming Guo and Pavel Zorin-Kranich.\n
DTSTART:20210322T203000Z
DTEND:20210322T213000Z
LAST-MODIFIED:20210324T121551Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-141
END:VEVENT
BEGIN:VEVENT
UID:77c7d540-c8ef-414c-bfc8-90c83e725781
DTSTAMP:20210622T223733Z
CREATED:20201211T183932Z
DESCRIPTION:Topic: Amortized circuit complexity\, formal complexity measure
s\, and catalytic algorithms\n\nSpeakers: Jeroen Zuiddam\n\nAffiliation: N
ew York University - Courant Institute of Mathematical Sciences\n\nSome of
the central questions in complexity theory address the\namortized complex
ity of computation (also sometimes known as direct\nsum problems). While t
hese questions appear in many contexts\, they are\nall variants of the fol
lowing: \n\nIs the best way of computing T many times in parallel simply t
o\ncompute T independently each time\, or\, can we achieve an economy of\n
scale and compute all copies of T more efficiently on average? \n\nIn this
talk\, we discuss some recent results studying the amortized\ncircuit com
plexity of computing boolean functions in various circuit\nmodels. The amo
rtized circuit complexity of a boolean function f is\ndefined to be the li
mit\, as m tends to infinity\, of the circuit\ncomplexity of computing f o
n the same input m times\, divided by m. We\nprove a new duality theorem f
or amortized circuit complexity in any\ncircuit model composed of gates ov
er a finite gate set\, showing that\nthe amortized circuit complexity of c
omputing f is equal to the best\nlower bound achieved by any 'formal compl
exity measure' applied to f.\nThis new duality theorem is inspired by\, an
d closely related to\,\nStrassen's duality theorem for semirings\, which h
as been fruitfully\nused to characterize the matrix multiplication exponen
t\, the Shannon\nCapacity of graphs\, as well as other important parameter
s in\ncombinatorics and complexity. We discuss how our new duality theorem
\ncan be used to give alternative proofs of upper bounds on amortized\ncir
cuit complexity\, and also the close relationship between amortized\ncircu
it complexity and catalytic algorithms\, in which an algorithm is\nprovide
d with an extra input of advice bits that it is free to use\, as\nlong as
it outputs a new copy of the extra advice on termination. \n\nThis is join
t work with Robert Robere.\n
DTSTART:20210323T143000Z
DTEND:20210323T163000Z
LAST-MODIFIED:20210323T120052Z
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-474
END:VEVENT
BEGIN:VEVENT
UID:c2eda2d5-df89-4d13-a397-63326c47894b
DTSTAMP:20210622T223733Z
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:1bec5059-7087-46f1-b872-6b27eda3d69c
DTSTAMP:20210622T223733Z
CREATED:20210105T221812Z
DESCRIPTION:Topic: Stratified ∞-topoi and toposic décollage\n\nSpeakers: Cl
ark Barwick\n\nAffiliation: University of Edinburgh\n\n
DTSTART:20210323T173000Z
DTEND:20210323T193000Z
LAST-MODIFIED:20210318T201446Z
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:f31e5814-05ba-45c2-b3b2-4ed01935ec12
DTSTAMP:20210622T223733Z
CREATED:20210106T222126Z
DESCRIPTION:Topic: Microlocal sheaves III: Regular singularities and Rieman
n-Hilbert\n\nSpeakers: Michael McBreen\n\nAffiliation: Chinese University
of Hong Kong\n\nIn the last talk of this series\, we discuss the microloca
l criterion\nfor regular singularities of a D-module\, and the existence o
f special\nfiltrations on regular holonomic microdifferential modules. Thi
s\nallows us to define a D-module-theoretic analogue of the vanishing\ncyc
les functor along a smooth hypersurface. We'll see in detail how\nthis loo
ks in the one-dimensional case. We also take a brief look at\nthe microloc
al Riemann-Hilbert correspondence.\n
DTSTART:20210323T220000Z
DTEND:20210324T000000Z
LAST-MODIFIED:20210322T144553Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-18
END:VEVENT
BEGIN:VEVENT
UID:534284ed-21ca-42e6-8f9d-c2a95c68515f
DTSTAMP:20210622T223733Z
CREATED:20210105T233231Z
DESCRIPTION:Topic: Why was Connes' embedding conjecture refuted and there a
re still no known non-hyperlinear groups?\n\nSpeakers: Michael Chapman \n
\nAffiliation: Hebrew University\n\nIn [MIP*=RE by JNVWY] the authors cons
truct a non-local game that\nresolves Tsirelson's problem to the negative
and by that refute\nConnes' embedding conjecture (CEC). The game *-algebra
(see e.g.\n[KPS]) enables one to construct a finitely presented *-algebra
from a\ngiven (synchronous) game. The *-algebra of the game from [JNVWY]
is\nrepresentable\, has a trace\, and its von Neumann closure is not\nembe
ddable in an ultraproduct of the hyperfinite\n$\mathrm{II}_1$-factor\, i.e
.\, it is not hyperlinear. If one could\nmanage to generate a game for whi
ch the *-algebra both refutes CEC and\nis the complex group ring of some g
roup $G$\, then one would have found\na non-hyperlinear group. There is a
known way of constructing games\nwhose *-algebra is the group ring of some
group $G$. These are called\n'Linear constraint system games' (See e.g. [
Slofstra\, KPS]). In this\ntalk I am going to:\n\n * Go through the defini
tions of non-local games\, game values and\nTsirelson's problem.\n * Introd
uce the game *-algebra.\n * Study representations of the game *-algebra and
their connection to\nvarious game values.\n * Define linear constraint sys
tem games and discuss some properties\nof their *-algebra (namely\, their
game group).\n * Explain how far the game in [JNVWY] is from being a linear
\nconstraint system game.\n\n
DTSTART:20210324T150000Z
DTEND:20210324T161500Z
LAST-MODIFIED:20210324T124728Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-19
END:VEVENT
BEGIN:VEVENT
UID:4a5abf81-6eb1-4d8d-b099-3e71c91c3105
DTSTAMP:20210622T223733Z
CREATED:20210115T153234Z
DESCRIPTION:Topic: A systematic determination of the duration of the embedd
ed phase of star formation\n\nSpeakers: Jenny Kim\n\nAffiliation: Universi
ty of Heidelberg\n\nStars and star clusters form in the densest regions of
molecular\nclouds. Recent works show that quickly after the onset of star
\nformation\, giant molecular clouds are effectively disrupted by\nfeedbac
k from massive stars in the form of photoionization\, winds\,\nsupernovae\
, and radiation pressure\, exposing the young stellar\npopulation. However
\, how and when these newly born clusters emerge\nfrom their natal gas\, t
erminating embedded phase of star formation\, is\nstill ill-constrained. W
e apply a recently developed statistical\nmethod to six nearby galaxies us
ing Spitzer 24mic\, Halpha\, and CO\nemissions as tracers of the embedded
star formation\, exposed star\nformation\, and molecular clouds\, respecti
vely\, with the goal of\nmeasuring how long massive stellar populations r
emain embedded within\ntheir natal cloud. We find that the embedded phase
of star formation\,\ncomposed of a heavily obscured and partially exposed
phase lasts for\n2-7 Myr\, constituting 20-40% of the cloud lifetime. The
duration of\nthe heavily obscured phase of star formation (with visible CO
and\n24mic emissions\, but no Halpha emission detected) is found to be\nr
elatively constant between the galaxies of our sample\, with an\naverage o
f 2.9 +/-0.9 Myr. The duration of the partially exposed\nstar-forming phas
e (with visible CO\, 24mic\, and Halpha emissions)\nvaries more significan
tly\, ranging from 1 to 5 Myr. At the end of this\nphase\, the molecular c
louds are destroyed by stellar feedback from\nyoung clusters\, leaving 24m
ic emission detectable for another 1-6\nMyr. The short duration between th
e onset of massive star formation\nand cloud disruption suggests that pre-
supernova feedback such as\nphotoionization and winds from massive stars a
re important in\ndisrupting molecular clouds. The duration of each phase w
e measure\ndoes not show statistically significant correlations with galac
tic\nenvironments such as metallicity\, molecular gas\, and star formation
\nrate surface density.\n
DTSTART:20210324T150000Z
DTEND:20210324T160000Z
LAST-MODIFIED:20210319T152431Z
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:eea369d8-a234-4dd8-8b75-edf49801ce47
DTSTAMP:20210622T223733Z
CREATED:20210106T003104Z
DESCRIPTION:Topic: Parabolic version of the two realizations theorem and ap
plications to modular representation theory\n\nSpeakers: Ivan Loseu\n\nAff
iliation: Yale University\; Member\, School of Mathematics\n\nThe goal of
this talk is two-fold. We state a parabolic version of the\ntwo realizatio
ns theorem and sketch a proof. This version relates\nIwahori-constructible
sheaves on parabolic affine flag variety to\ncoherent sheaves on a parabo
lic version of the Steinberg. We also\nexplain an application of this resu
lt to the representation theory of\nsemisimple Lie algebras in positive ch
aracteristic. Our result here is\nan explicit character formula for approp
riately equivariant simple\nmodules with distinguished $p$-character. The
talk is based on\n2005.10030\, joint with Bezrukavnikov.\n
DTSTART:20210324T190000Z
DTEND:20210324T210000Z
LAST-MODIFIED:20210318T194921Z
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:0678c4db-0e19-4b8d-aebe-0a4dc1d5dff4
DTSTAMP:20210622T223733Z
CREATED:20210106T004926Z
DESCRIPTION:Topic: Surfaces and Point Processes\n\nSpeakers: Jayadev Athrey
a\n\nAffiliation: University of Washington\n\nWe'll give several concrete
examples of how to go from the geometry of\nsurfaces to the study of point
processes\, following work of Siegel\,\nVeech\, Masur\, Eskin\, Mirzakhan
i\, Wright\, and others. We'll discuss how\nthis 'probabilistic' perspecti
ve helps inform both the direction of\nquestions one asks\, as well as pro
viding ideas of how to prove things.\nWe'll discuss some pieces of joint w
ork with Cheung-Masur\, Margulis\,\nand Arana-Herrera.\n
DTSTART:20210324T213000Z
DTEND:20210324T230000Z
LAST-MODIFIED:20210329T181026Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-206
END:VEVENT
BEGIN:VEVENT
UID:5f9cdfde-5d0c-45a1-b8eb-4a629a385a54
DTSTAMP:20210622T223733Z
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:0b6adef9-1a6a-44e0-897d-c7a47f1d2835
DTSTAMP:20210622T223733Z
CREATED:20210113T164333Z
DESCRIPTION:Topic: Constraints on the maximum mass of neutron stars from gr
avitational wave events and prospects for electromagnetic precursor emiss
ion from inspiralling neutron star binaries.\n\nSpeakers: Elias Most\n\nAf
filiation: The Institute for Advanced Study\n\nSince the first detection o
f a gravitational wave event of the merger\nof two neutron stars in 2017\,
two more detections in the neutron star\nmass range have been announced.
The first one\, GW190425\, involved an\nunusually massive neutron star\,
the second one\, GW190814\, had a\ncompanion in the lower mass gap that co
uld either have been the\nheaviest neutron star or the lightest black hole
ever observed. Based\non constraints on the neutron star maximum mass der
ived in the context\nof GW170817\, I will discuss the possibility of havin
g a very massive\nneutron star in the GW190814 event and its implications
for the\nneutron star equation of state.\n\nIn the second half of the talk
\, I will discuss a scenario for the\nproduction of electromagnetic precur
sor emission in the late neutron\nstar inspiral. Since neutron stars are e
quipped with strong magnetic\nfields\, the non-trivial interaction of two
neutron star magnetospheres\nbefore the merger might give rise to an elect
romagnetic precursor\nemission. I will present a mechanism for launching p
owerful\nelectromagnetic flares during the inspiral of two neutron stars.
\n Using special-relativistic force-free electrodynamics simulations\, I\n
will demonstrate that differential motion\, such as relative spin\ndiffere
nces between the neutron stars or misalignment of the magnetic\nfield with
the orbital axis\, can naturally lead to a periodic emission\nof such fla
res. I will also comment on the viability to produce radio\nemission in th
is process.\n
DTSTART:20210325T150000Z
DTEND:20210325T160000Z
LAST-MODIFIED:20210322T130626Z
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:dba9a68c-145a-44f9-b395-3b967f38c81c
DTSTAMP:20210622T223733Z
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:98f19340-7d0a-4ed2-a874-b272a94a1e21
DTSTAMP:20210622T223733Z
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:7b743b8c-7894-469b-8539-b084f2a143c7
DTSTAMP:20210622T223733Z
CREATED:20210107T005035Z
DESCRIPTION:Topic: Quantum groups at roots of unity\n\nSpeakers: Jay Taylor
\n\nAffiliation: University of Southern California\; Member\, School of Ma
thematics\n\nContinuation of the previous talk.\n
DTSTART:20210325T200000Z
DTEND:20210325T220000Z
LAST-MODIFIED:20210325T123553Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-7
END:VEVENT
BEGIN:VEVENT
UID:f655e372-538a-4024-ae35-ab9f666f6afc
DTSTAMP:20210622T223733Z
CREATED:20210106T011157Z
DESCRIPTION:Topic: The local Gan-Gross-Prasad conjecture for real unitary g
roups\n\nSpeakers: Hang Xue\n\nAffiliation: The University of Arizona\n\nA
classical branching theorem of Weyl describes how an irreducible\nreprese
ntation of compact $U(n+1)$ decomposes when restricted to\n$U(n)$. The loc
al Gan-Gross-Prasad conjecture provides a conjectural\nextension to the se
tting of representations of noncompact unitary\ngroups lying in a generic
L-packet. We prove this conjecture.\nPreviously Beuzart-Plessis proved the
''multiplicity one in a Vogan\npacket'' part of the conjecture for temper
ed L-packets using the local\ntrace formula approach initiated by Waldspur
ger. Our proof uses theta\nlifts instead\, and is independent of the trace
formula argument.\n
DTSTART:20210325T203000Z
DTEND:20210325T213000Z
LAST-MODIFIED:20210325T180609Z
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:a904dcd8-248e-458a-a41f-342631800ffa
DTSTAMP:20210622T223733Z
CREATED:20210106T022020Z
DESCRIPTION:Topic: Three 20min research talks\n\nSpeakers: Jesse Huang\, Sh
aoyun Bai\, Thomas Melistas\n\nAffiliation: University of Illinois at Urba
na-Champaign\; Princeton University\; University of Georgia\n\nJESSE HUANG
(UIUC)\, Variation of FLTZ skeleta\n\nIn this short talk\, I will discuss
an interpolation of FLTZ skeleta\nmirror to derived equivalent toric vari
eties. This is joint work with\nPeng Zhou.\n\nSHAOYUN BAI (PRINCETON)\, $S
U(n)$–Casson invariants and symplectic\ngeometry\n\nIn 1985\, Casson intro
duced an invariant of integer homology 3-spheres\nby counting $SU(2)$-repr
esentations of the fundamental groups. The\ngeneralization of Casson invar
iant by considering Lie groups SU(n) has\nbeen long expected\, but the ori
ginal construction of Casson encounters\nsome difficulties. I will present
a solution to this problem\,\nhighlighting the equivariant symplectic geo
metry and Atiyah-Floer type\nresult entering the construction.\n\nTHOMAS M
ELISTAS (UGA)\, The Large-Scale Geometry of Overtwisted Contact\nForms\n\n
Inspired by the symplectic Banach-Mazur distance\, proposed by Ostrover\na
nd Polterovich in the setting of non-degenerate starshaped domains of\nLio
uville manifolds\, we define a distance on the space of contact\nforms sup
porting a given contact structure on a closed contact\nmanifold and we use
it to bi-Lipschitz embed part of the 2-dimensional\nEuclidean space into
the space of overtwisted contact forms supporting\na given contact structu
re on a smooth closed manifold.\n
DTSTART:20210326T131500Z
DTEND:20210326T144500Z
LAST-MODIFIED:20210318T200413Z
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:0619d4a6-1e3d-4028-b4e2-283d341b6fd2
DTSTAMP:20210622T223733Z
CREATED:20210205T161041Z
DESCRIPTION:Topic: Extreme particle acceleration in pulsars: from the magne
tosphere to the nebula\n\nSpeakers: Benoit Cerutti\n\nAffiliation: CNRS/Gr
enoble\n\nPulsars blow ultra-magnetized relativistic winds loaded with\nel
ectron-positron pairs created and launched in the magnetospheric\nregions.
A generic feature of pulsar winds is a large-scale\noscillating current s
heet\, or striped wind\, forming where the magnetic\nfield polarity revers
es\, thus providing an ideal environment for\nstudying magnetic reconnecti
on and particle acceleration under extreme\nphysical conditions (relativis
tic\, collisionless and radiative\nregime)\, and yet perhaps applicable to
other high-energy astrophysical\nobjects such as AGN jets and gamma-ray b
ursts. Reconnection in the\ninnermost parts of the wind is thought to powe
r the observed\nhigh-energy pulsed emission from pulsars. Recent global\np
article-in-cell simulations suggest that reconnection proceeds in the\npla
smoid-dominated regime and consumes the field until the complete\ndissipat
ion of the striped wind. At the wind termination shock\, the\nremaining ma
gnetic energy may be dissipated via turbulent reconnection\nand shear-flow
acceleration\, which may power the bright synchrotron\nnebula surrounding
pulsars and possibly the mysterious Crab gamma-ray\nflares.\n
DTSTART:20210326T163000Z
DTEND:20210326T180000Z
LAST-MODIFIED:20210319T141129Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-5
END:VEVENT
BEGIN:VEVENT
UID:7a092650-c5b6-41ea-92d3-1c172569de6e
DTSTAMP:20210622T223733Z
CREATED:20210114T142852Z
DESCRIPTION:Topic: Quantifying the Stellar Halo's Response to the LMC's Inf
all with Spherical Harmonics\n\nSpeakers: Emily Cunningham\n\nAffiliation:
CCA Flatiron Institute\n\nEach week\, we hold a relatively informal semin
ar/discussion series\nwith an emphasis on extra-galactic and large-scale s
tructure\nastrophysics.\n\nDuring Galread a leader/visitor presents a rece
nt 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\npowerpoint
-style slides. Galread discussions are very friendly and\ninteractive.\n
DTSTART:20210329T150000Z
DTEND:20210329T160000Z
LAST-MODIFIED:20210326T125328Z
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:4ba8dba3-7f1e-4ce7-902d-8cf40bf5b86b
DTSTAMP:20210622T223733Z
CREATED:20201211T183039Z
DESCRIPTION:Topic: Approximating Max Cut with Subexponential Linear Program
s\n\nSpeakers: Tselil Schramm\n\nAffiliation: Stanford University\n\nIn th
e max cut problem\, we are given an n-vertex graph and we are\nasked what
is the maximum fraction of edges 'cut' by any partition of\nthe vertices?
This problem can be reformulated as an optimization\nproblem over the cut
polytope\, which has exponentially many vertices\nand facets. A classical
result of Goemans and Williamson proves that\nwe can approximate the max c
ut value of a graph within a factor of\n0.878\, by instead optimizing over
a spectrahedral relaxation of\npolynomial complexity. The theory-of-appro
ximation orthodoxy (for good\nreason) predicts that polytope relaxations a
re far inferior\, and small\npolytopes cannot hope to give non-trivial app
roximation to max cut. In\nthis talk\, I will describe a result which defi
es this prediction: we\nshow that polytopes with subexponentially many fac
ets *can* give\nnontrivial approximations to the max cut problem\, as well
as other\ncombinatorial optimization problems. This is in surprising cont
rast to\noptimization problems over the reals\, for which an exponential\n
separation between spectrahedra and polytopes is known.\n
DTSTART:20210329T151500Z
DTEND:20210329T161500Z
LAST-MODIFIED:20210329T120220Z
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:36dc633c-6908-4f96-8f83-fab8fb336b3c
DTSTAMP:20210622T223733Z
CREATED:20210114T152337Z
DESCRIPTION:Topic: Young planets and the stars they orbit\n\nSpeakers: Elis
abeth Newton\n\nAffiliation: Dartmouth University\n\nYoung exoplanets prov
ide the opportunity to examine bulk density\,\natmospheric composition\, a
nd mass loss in planets where evolutionary\nchanges are likely to be under
way. Exoplanets in young associations\noffer a unique opportunity because
the age of the planetary system is\nknown through studies of the ensemble
of stars in the association.\nTESS's nearly all-sky survey provides the op
portunity to search for\nplanets in known young associations -- and in pre
viously unknown ones.\nI will share the discoveries of two new young plane
tary systems\nidentified in TESS data by the THYME collaboration and frien
ds: TOI\n451 b\,c\,d and TOI 1098 b. I'll discuss why I'm happy it took us
two\nyears to publish TOI 451\, and why the TOI 1098 planet discovery pap
er\nis mostly about stars.\n
DTSTART:20210329T160000Z
DTEND:20210329T170000Z
LAST-MODIFIED:20210326T125736Z
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:0f759f00-96b5-4842-a3b9-a1b69bf8fd84
DTSTAMP:20210622T223733Z
CREATED:20210114T150444Z
DESCRIPTION:Topic: Topic 1: Merging deep learning with physical models for
the analysis of modern cosmological surveys Topic2: Cosmology with Cluster
Weak Lensing\n\nSpeakers: François Lanusse and David Weinberg\n\nAffiliat
ion: CosmoStat Laboratory at CEA Saclay and OSU\, at IAS on sabbatical\n\n
Abstract 1:The upcoming generation of cosmological surveys such as\nLSST w
ill aim to map the Universe in great detail and on an\nunprecedented scale
. This of course implies new and outstanding\nchallenges at all levels of
the scientific analysis\, from pixel level\ndata reduction to cosmological
inference. In this talk\, I will\nillustrate how recent advances in deep
learning and associated\nautomatic differentiation frameworks\, can help u
s tackle these\nchallenges and rethink our approach to data analysis for c
osmological\nsurveys. \nWe will see how at the pixel level\, combining phy
sical models of the\ninstrument (which account for noise/PSF) with data-dr
iven deep\ngenerative models can enable us to solve a number of astronomic
al\ninverse problems ranging from deconvolution to deblending galaxy\nimag
es. I will then illustrate how neural density estimation methods\ncan help
us leverage the full information content of numerical\nsimulations for Ba
yesian inference\, either on intermediate fields\,\nlike weak-lensing conv
ergence maps\, or all the way to cosmological\nparameters. And finally\, I
will present our efforts to develop tools\nfor automatically differentiab
le physical models\, from analytic\ncosmological observables to N-body sim
ulations\, opening the door to a\nrange of novel and efficient gradient-ba
sed inference techniques\, and\nallowing for fast hybrid physical/ml model
s.\n\nAbstract 2: I will discuss methods and forecasts for cosmology with
\ncluster weak lensing\, focusing on the papers\nhttps://arxiv.org/abs/201
2.01956 and https://arxiv.org/abs/1906.06499\nWe advocate an approach that
is analogous to galaxy-galaxy lensing\, in\nwhich the primary observable
is the mean tangential shear profile of\nclusters above a threshold in som
e mass proxy (richness\, SZ decrement\,\nX-ray luminosity\, etc.)\, across
the linear and non-linear regimes\,\ntogether with the mean space density
of those clusters. The 1906.06499\npaper describes the further gains from
incorporating the\ncluster-galaxy cross-correlation and galaxy auto-corre
lation as\nadditional observables.\nI will briefly advertise https://arxiv
.org/abs/1907.06611 which\ncalculates weak lensing covariance matrices\, a
tricky but soluble\nproblem. These papers forecast achievable statistical
errors on sigma8\nbelow 1% for DES and approaching 0.1% for VRO. I will c
omment on what\nI see as the most challenging systematic uncertainties tha
t must be\ncontrolled to realize this statistical promise. Time permitting
\, we\ncould discuss the surprising DES Y1 cluster cosmology results\nhttp
s://arxiv.org/abs/2002.11124.\n
DTSTART:20210329T163000Z
DTEND:20210329T180000Z
LAST-MODIFIED:20210326T130019Z
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:51583e8b-df4e-460e-ae1a-4d82bf1204c3
DTSTAMP:20210622T223733Z
CREATED:20201209T231745Z
DESCRIPTION:Topic: No seminar: workshop\n\n
DTSTART:20210329T180000Z
DTEND:20210329T190000Z
LAST-MODIFIED:20210322T141701Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-0
END:VEVENT
BEGIN:VEVENT
UID:af9758f7-c7e3-449f-bff8-35366836d7bb
DTSTAMP:20210622T223733Z
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:a574c6fc-d38b-4fd5-8ac0-786dce37d47f
DTSTAMP:20210622T223733Z
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:83d1d211-3bf2-413d-8cd8-fd556016a555
DTSTAMP:20210622T223733Z
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:20210329T121159Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-142
END:VEVENT
BEGIN:VEVENT
UID:899a7d84-636f-4c81-a8de-8b99da9831f5
DTSTAMP:20210622T223733Z
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:e9732174-bf33-4294-9fad-90528af2d48c
DTSTAMP:20210622T223733Z
CREATED:20210302T001222Z
DESCRIPTION:Topic: From Weyl modules to simple modules in many small steps
\n\nSpeakers: George Lusztig\n\nAffiliation: Massachusetts Institute of Te
chnology\n\nLet G be a semisimple group over an algebraically closed field
of\nlarge characteristic. There are two important types of rational\nrepr
esentations of G: the Weyl modules and the simple modules. We will\nexplai
n how to go from the first type to the second type by a sequence\nof small
steps.\n
DTSTART:20210330T130000Z
DTEND:20210330T140000Z
LAST-MODIFIED:20210322T120652Z
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:f4b94ac7-6a79-4f55-be62-bb20fb228ee0
DTSTAMP:20210622T223733Z
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:cdfb7225-fa07-4e66-9519-be1554be7afe
DTSTAMP:20210622T223733Z
CREATED:20201211T184005Z
DESCRIPTION:Topic: Computational - Statistical gaps and the Group Testing
problem\n\nSpeakers: Fotis Iliopoulos\n\nAffiliation: Member\, School of M
athematics\n\nIn a plethora of random models for constraint satisfaction a
nd\nstatistical inference problems\, researchers from different communitie
s\nhave observed computational gaps between what existential or\nbrute-for
ce methods promise\, and what known efficient algorithms\nachieve. In this
talk\, I will discuss this phenomenon in the context\nof the so-called Gr
oup Testing problem.\n\nGroup Testing is a fundamental problem in statisti
cal inference with\nmany real-world applications. The goal is to detect a
set of k\ndefective items out of a population of size p using n << p tests
.\nTowards that end\, one is allowed to utilize a procedure that can test
\ngroups of items\, in which each test is returned positive if and only\ni
f at least one item in the group is defective. In this talk\, I will\ndis
cuss the task of _approximate_ recovery\, in which we tolerate\nhaving a s
mall number of incorrectly classified items.\n
DTSTART:20210330T143000Z
DTEND:20210330T163000Z
LAST-MODIFIED:20210331T142820Z
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-475
END:VEVENT
BEGIN:VEVENT
UID:d8d7cd16-0bb7-4a30-bb92-30ff0c7ac42c
DTSTAMP:20210622T223733Z
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:65e3290a-676a-452b-bfa0-ae4df34e1d17
DTSTAMP:20210622T223733Z
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:73db3b25-72f3-44ac-8b83-cba5e574c3e4
DTSTAMP:20210622T223733Z
CREATED:20210105T221829Z
DESCRIPTION:Topic: Exodromy correspondence for stratified ∞-topoi\n\nSpeake
rs: Remy van Dobben de Bruyn\n\nAffiliation: Institute for Advanced Study
and Princeton University\; Veblen Research Instructor\, School of Mathemat
ics\n\n
DTSTART:20210330T173000Z
DTEND:20210330T193000Z
LAST-MODIFIED:20210325T163048Z
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:7c77c6e0-6d00-4ff9-8337-a6640c36bae9
DTSTAMP:20210622T223733Z
CREATED:20210106T222141Z
DESCRIPTION:Topic: No seminar: workshop\n\n
DTSTART:20210330T190000Z
DTEND:20210330T210000Z
LAST-MODIFIED:20210325T175042Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-19
END:VEVENT
BEGIN:VEVENT
UID:a5e910c6-4aca-4f53-8c29-51f9891dd8ee
DTSTAMP:20210622T223733Z
CREATED:20210105T233246Z
DESCRIPTION:Topic: Ultrametric stability problems\n\nSpeakers: Francesco Fo
urnier-Facio\n\nAffiliation: Eidgenössische Technische Hochschule Zürich\n
\nWe study stability problems with respect to families of groups\nequipped
with bi-invariant ultrametrics\, that is\, metrics satisfying\nthe strong
triangle inequality. This property has very strong\nconsequences\, and th
is form of stability behaves very differently from\nthe other ones that we
saw throughout the seminar. Many results can be\nestablished in full gene
rality\, but we will focus on a p-adic analogue\nof Ulam stability\, where
the family of approximating groups is\n$GL_n(Z_p)$.\n
DTSTART:20210331T150000Z
DTEND:20210331T161500Z
LAST-MODIFIED:20210413T173417Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-20
END:VEVENT
BEGIN:VEVENT
UID:649d37d6-ff82-44b8-addc-7c2123d96e1b
DTSTAMP:20210622T223733Z
CREATED:20210115T153327Z
DESCRIPTION:Topic: Probing the Structure and Dynamics of our Local ISM on P
arsec to Kiloparsec Scales\n\nSpeakers: Catherine Zucker\n\nAffiliation: H
arvard University\, CfA\n\nMuch of our knowledge about the formation of st
ars comes from\nobservations of our solar neighborhood\, less than 2 kpc f
rom the Sun.\nHowever\, before 2018\, accurate distance measurements neede
d to\ntransform the 2D sky into a faithful 3D physical picture of stars an
d\nthe interstellar clouds that form them were few and far between. In\nth
is talk\, I will discuss how the rise of _Gaia_ and large\nphotometric sur
veys — in combination with new data science and\nvisualization techniques
— are quickly changing the landscape. In\nparticular\, I will show how 3D
dust maps have received a huge distance\nresolution boost from _Gaia_\, al
lowing us to resolve the 3D spatial\nstructure of our local interstellar m
edium at large dynamic range (and\non scales comparable to simulations) fo
r the first time. On small\nscales\, I will present an analysis of the 3D
spatial topologies of\nlocal molecular clouds at 1 pc resolution. And on l
arger scales\, I\nwill discuss ongoing work to contextualize these clouds'
properties in\nterms of their larger galactic environment\, including a n
ewly\ndiscovered nearby superbubble and kiloparsec-scale features like\nth
e _Radcliffe Wave_. \n
DTSTART:20210331T150000Z
DTEND:20210331T160000Z
LAST-MODIFIED:20210326T132136Z
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:beead0ef-2e61-4ee4-8392-0c32d652729a
DTSTAMP:20210622T223733Z
CREATED:20200921T192409Z
DESCRIPTION:Topic: Castle to castle: The Saadian Library in the El Escorial
Collection\n\nSpeakers:\nFRANÇOIS DÉROCHE (Collège de France\, PSL\, Pari
s)\nNURIA DE CASTILLA (École Pratique des Hautes Études\, PSL\, Paris)\n\n
The title of Ferdinand Céline’s novel resumes the fate of the\nSaadian sul
tans’ library and the premonitory curiosity its founder\,\nAḥmad al-Manṣūr
\, is said to have had for the palace Philip II of\nSpain was building in
the El Escorial. Over the last few years\, the\nERC-funded SICLe project
has been retrieving information from the\nroughly two thousand manuscripts
of the collection. This thorough\nsurvey shows that the history of the Sa
adian library is more\ncomplicated than is commonly thought and that its c
ontents\, both\nmaterial and immaterial\, can shed a new light on the cult
ural and\nintellectual life in sixteenth-century Morocco.\n\nRegister in a
dvance for this webinar here\n[https://theias.zoom.us/webinar/register/WN_
M68Stl4oRIuifapcrCP69Q].\nAfter registering\, you will receive a confirmat
ion email containing\ninformation about joining the webinar.\n\n \n
DTSTART:20210331T160000Z
DTEND:20210331T160000Z
LAST-MODIFIED:20210315T133533Z
LOCATION:
SUMMARY:Near Eastern Studies Lecture
URL:https://www.ias.edu/events/near-eastern-studies-lecture-2
END:VEVENT
BEGIN:VEVENT
UID:abb3dd0f-8338-4eea-85a3-babea6351a5a
DTSTAMP:20210622T223733Z
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:e43d5aca-933d-4a2b-9cac-48a3f4401d11
DTSTAMP:20210622T223733Z
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:61da4b4f-6708-4f1f-bd37-8df2730104ef
DTSTAMP:20210622T223733Z
CREATED:20210302T001354Z
DESCRIPTION:Topic: New isolated symplectic singularities with trivial funda
mental group\n\nSpeakers: Daniel Juteau\n\nAffiliation: CNRS\, Université
Paris Diderot\; Member\, School of Mathematics\n\nAbstract: In 2000\, Arna
ud Beauville introduced the notion of\nsymplectic singularities and raised
the question of classifying\nisolated symplectic singularities with trivi
al local fundamental\ngroup: the latter condition is meant to avoid the nu
merous quotient\nsingularities\, since their classification would become i
ntractable as\nthe dimension increases. Actually\, he asked whether there
was any\nexample beyond minimal nilpotent orbit closures in simple Lie\nal
gebras. We will describe a family of four-dimensional examples\nrelated to
dihedral groups\, which can be described in several ways:\nblow-up of quo
tient singularities\, Calogero-Moser spaces\, or covers of\nnilpotent slic
es\, with Nakajima quiver varieties providing connections\nbetween the las
t two. The one attached to the dihedral group of order\n10 appears in the
nilpotent cone of type $E_8$. This is joint work\nwith Gwyn Bellamy\, Cédr
ic Bonnafé\, Baohua Fu\, Paul Levy\, and Eric\nSommers.\n
DTSTART:20210331T193000Z
DTEND:20210331T203000Z
LAST-MODIFIED:20210330T180350Z
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:a41cb28c-1814-4f2c-b9c3-c2ede11ee660
DTSTAMP:20210622T223733Z
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:ce7e3f4e-8c15-473c-8b13-6723cb811643
DTSTAMP:20210622T223733Z
CREATED:20210106T004944Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210331T213000Z
DTEND:20210331T230000Z
LAST-MODIFIED:20210329T181046Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-207
END:VEVENT
BEGIN:VEVENT
UID:301d7044-8c71-478e-98a6-d184b615b02c
DTSTAMP:20210622T223733Z
CREATED:20210302T001439Z
DESCRIPTION:Topic: A Hecke action on the principal block of a semisimple al
gebraic group\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\nalgebraic group over an algebraically closed field
of positive\ncharacteristic\, obtained in joint work with Roman Bezrukavn
ikov. As\nnoticed in earlier work with Geordie Williamson\, the existence
of this\naction has nice consequences\, in particular a character formula
for\nindecomposable tilting modules in terms of $p$-Kazhdan-Lusztig\npolyn
omials.\n
DTSTART:20210401T130000Z
DTEND:20210401T140000Z
LAST-MODIFIED:20210329T122053Z
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:95014af2-70ee-4d79-880d-54e2faae2451
DTSTAMP:20210622T223733Z
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:cb1df2b7-23b2-48cf-adfa-084dac83be33
DTSTAMP:20210622T223733Z
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:5562412f-52aa-4a10-b7a5-bbba5424adb1
DTSTAMP:20210622T223733Z
CREATED:20210113T164254Z
DESCRIPTION:Topic: Tidal Deformation and Dissipation of Rotating Black Hole
s\n\nSpeakers: Horng Sheng Chia\n\nAffiliation: The Institute for Advanced
Study\n\nBlack holes are never isolated in realistic astrophysical\nenvir
onments\; instead\, they are often perturbed by complicated\nexternal tida
l fields. How does a black hole respond to these tidal\nperturbations? In
this talk\, I will discuss both the conservative and\ndissipative response
s of the Kerr black hole to a weak and adiabatic\ngravitational field. The
former describes how the black hole would\nchange its shape due to these
tidal interactions\, and is quantified by\nthe so-called “Love numbers”. O
n the other hand\, the latter\ndescribes how energy and angular momentum a
re exchanged between\nthe black hole and its tidal environment due to the
absorptive\nnature of the event horizon. I will show that the Love numbers
of the\nKerr black hole in a static field vanish identically. I will also
\ndescribe how the Kerr black hole's dissipative response implies that\nen
ergy and angular momentum can either be lost to or extracted from\nthe bla
ck hole\, with the latter process commonly known as the black\nhole superr
adiance. I will end by discussing how these tidal\nresponses leave distinc
t imprints on the gravitational waves emitted\nby binary black holes.\n
DTSTART:20210401T150000Z
DTEND:20210401T160000Z
LAST-MODIFIED:20210329T121417Z
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:3b535a04-7aad-4e5d-895e-4b23a251fc06
DTSTAMP:20210622T223733Z
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:aa18f781-7dc7-4dab-986b-1b16ce5f4055
DTSTAMP:20210622T223733Z
CREATED:20210107T005052Z
DESCRIPTION:Topic: Quantum groups at roots of unity\n\nSpeakers: Jay Taylor
\n\nAffiliation: University of Southern California\; Member\, School of Ma
thematics\n\nContinuation of the talk from last time.\n\n \n
DTSTART:20210401T200000Z
DTEND:20210401T220000Z
LAST-MODIFIED:20210401T125738Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-8
END:VEVENT
BEGIN:VEVENT
UID:f948280e-1d72-408e-a461-476c75acaab4
DTSTAMP:20210622T223733Z
CREATED:20210106T011215Z
DESCRIPTION:Topic: Eisenstein series\, p-adic deformations\, Galois represe
ntations\, and the group G_2\n\nSpeakers: Sam Mundy\n\nAffiliation: Columb
ia University\n\nI will explain some recent work on special cases of the B
loch-Kato\nconjecture for the symmetric cube of certain modular Galois\nre
presentations. Under certain standard conjectures\, this work\nconstructs
nontrivial elements in the Selmer groups of these symmetric\ncube Galois r
epresentations\; this works by $p$-adically deforming\ncritical Eisenstein
series in a generically cuspidal family of\nautomorphic representations\,
and then constructing a lattice in the\nassociated family of Galois repre
sentations\, all for the exceptional\ngroup $G_2$. While I will touch on a
ll of these aspects of the\nconstruction\, I will mainly focus on the Galo
is side in this talk.\n
DTSTART:20210401T203000Z
DTEND:20210401T213000Z
LAST-MODIFIED:20210401T124909Z
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:f2b76cbc-3b43-4b58-b467-380ec69da7a0
DTSTAMP:20210622T223733Z
CREATED:20210106T022037Z
DESCRIPTION:Topic: Categorical non-properness in wrapped Floer theory\n\nSp
eakers: Sheel Ganatra\n\nAffiliation: University of Southern California\n
\nIn all known explicit computations on Weinstein manifolds\, the\nself-wr
apped Floer homology of non-compact exact Lagrangian is always\neither inf
inite-dimensional or zero. We will explain why a global\nvariant of this o
bserved phenomenon holds in broad generality: the\nwrapped Fukaya category
of any Weinstein (or non-degenerate Liouville)\nmanifold is always either
non-proper or zero\, as is any quotient\nthereof. Moreover any non-compac
t connected exact Lagrangian is always\neither a 'non-proper object' or ze
ro in such a wrapped Fukaya\ncategory\, as is any idempotent summand there
of. We will also examine\nwhere the argument could break if one drops exac
tness\, which is\nconsistent with known computations of non-exact wrapped
Fukaya\ncategories which are smooth\, proper\, and non-vanishing (e.g.\, w
ork of\nRitter-Smith).\n
DTSTART:20210402T131500Z
DTEND:20210402T144500Z
LAST-MODIFIED:20210326T132842Z
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:1b9ccd66-fca9-4a0d-996a-ff69acedcf3e
DTSTAMP:20210622T223733Z
CREATED:20210329T122727Z
DESCRIPTION:Topic: Have we exhausted the galaxy two-point function?\n\nSpea
kers: Oliver Philcox\n\nAffiliation: Princeton University\n\nThroughout th
e past three decades\, the analysis of spectroscopic\nsurveys has focussed
around the two-point function of the galaxy\noverdensity field\, masquera
ding either as the correlation function or\nthe Fourier-space power spectr
um. Today\, theoretical interest has\nshifted towards other statistics\, i
n particular the higher-point\nfunctions. Does this mean we are confident
in our understanding of the\npower spectrum’s intricacies? In this talk\,
I will argue that\,\ndespite a huge wealth of previous work\, two-point an
alyses can yet be\nimproved. In particular\, I will discuss a selection of
recent works\nconcerning power spectrum estimation and analysis\, focussi
ng on\noptimal power spectrum estimation and compression\, faster small-sc
ale\nestimators\, subtleties in the definition of the anisotropic power\ns
pectra\, and the question of whether we can do better with transformed\nde
nsity fields. Such questions will be of great importance for\nupcoming lar
ge-scale structure surveys such as DESI and Euclid.\n
DTSTART:20210402T160000Z
DTEND:20210402T170000Z
LAST-MODIFIED:20210329T122939Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-group-semin
ar
END:VEVENT
BEGIN:VEVENT
UID:f99b399f-f524-4122-85b6-70914b4a58ce
DTSTAMP:20210622T223733Z
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:20210325T192259Z
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:a8ce526b-4e20-4618-9425-db4daf7d7b75
DTSTAMP:20210622T223733Z
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:654cb9ca-4250-4657-b22b-ce7218e2bfb8
DTSTAMP:20210622T223733Z
CREATED:20210115T162918Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210402T190000Z
DTEND:20210402T200000Z
LAST-MODIFIED:20210326T175647Z
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:702b55de-083c-46bf-a1a8-a234e6444b9d
DTSTAMP:20210622T223733Z
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:736421c7-07ca-47c1-b43b-9cdd57a2df56
DTSTAMP:20210622T223733Z
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:da5fcc99-55f4-41b7-b374-a8dea5a411b1
DTSTAMP:20210622T223733Z
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\,\nthe authors propose a conjectural genera
lization of the derived Satake\nequivalence for complex reductive groups t
o spherical varieties. I\nwill describe a program aimed at establishing th
eir conjecture in the\ncase of symmetric varieties (an important class of
spherical\nvarieties). A key ingredient is the relation between the derive
d\nSatake equivalence for symmetric varieties and the geometric Langlands
\nfor real reductive groups. This is joint work with David Nadler.\n
DTSTART:20210403T130000Z
DTEND:20210403T140000Z
LAST-MODIFIED:20210322T120851Z
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:1df00370-c0bf-4ca4-b8f8-8eeb19ae069b
DTSTAMP:20210622T223733Z
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:a5f9e93b-1347-4560-9867-2daac7e13825
DTSTAMP:20210622T223733Z
CREATED:20210302T001745Z
DESCRIPTION:Topic: The Drinfeld--Sokolov reduction of admissible representa
tions of affine Lie algebras\n\nSpeakers: Gurbir Dhillon\n\nAffiliation: Y
ale University\n\nLet $g$ be a semisimple Lie algebra. The affine W-algebr
a associated\nto $g$ is a topological algebra which quantizes the algebrai
c loop\nspace of the Kostant slice. It is constructed as a quantum Hamilto
nian\n(alias quantum Drinfeld--Sokolov) reduction of the corresponding\naf
fine Lie algebra. The admissible representations (resp.\, minimal\nseries)
are a family of highest weight modules for affine Lie algebras\n(resp.\,
affine W-algebras) distinguished by their role in rational\nconformal fiel
d theory. A basic pair of conjectures proposed by\nFrenkel--Kac--Wakimoto
state that two versions of the\nDrinfeld--Sokolov reduction functor send a
dmissible representations of\naffine Lie algebras to minimal series repres
entations of W-algebras.\nFor one version\, the 'minus' reduction\, this w
as settled by Arakawa.\nWe have confirmed the conjecture for the outstandi
ng 'plus' reduction.\nThe main new technical inputs come from the local qu
antum geometric\nLanglands program.\n
DTSTART:20210403T160000Z
DTEND:20210403T170000Z
LAST-MODIFIED:20210324T123817Z
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:cae9b578-cae4-48c0-bb42-66e9401a039f
DTSTAMP:20210622T223733Z
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:be8eccb5-630d-4c3f-b4eb-f70604839841
DTSTAMP:20210622T223733Z
CREATED:20201211T183110Z
DESCRIPTION:Topic: Pandora's Box with Correlations: Learning and Approximat
ion\n\nSpeakers: Shuchi Chawla\n\nAffiliation: University of Wisconsin-Mad
ison\n\nIn the Pandora's Box problem\, the algorithm is provided with a nu
mber\nof boxes with unknown (stochastic) rewards contained inside them. Th
e\nalgorithm can open any box at some cost\, discover the reward inside\,
\nand based on these observations can choose one box and keep the reward\n
contained in it. Given the distributions from which the rewards are\ndrawn
\, the algorithm must determine an order in which to open the\nboxes as we
ll as when to stop and accept the best reward found so far.\nIn general\,
an optimal algorithm may make both decisions adaptively\nbased on instanti
ations observed previously. The Pandora's Box problem\nand its extensions
capture many kinds of optimization problems with\nstochastic input where t
he algorithm can obtain instantiations of\ninput random variables at some
cost. Previous work on these problems\nassumes that different random varia
bles in the input are distributed\nindependently. As such it does not capt
ure many real-world settings.\nIn this work\, we provide the first algorit
hms for Pandora's Box-type\nproblems with correlations. In the independent
setting\, optimal\nalgorithms are non-adaptive and based on the notion of
the Gittins\nindex. These techniques fail to extend to the correlated cas
e. We\nassume that the algorithm has access to samples drawn from the join
t\ndistribution on input and provide solutions that require few samples\;
\nare computationally efficient\; and guarantee approximate optimality.\n
\nThis is joint work with Evangelia Gergatsouli\, Yifeng Teng\, Christos\n
Tzamos\, and Ruimin Zhang.\n
DTSTART:20210405T151500Z
DTEND:20210405T161500Z
LAST-MODIFIED:20210405T144311Z
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-481
END:VEVENT
BEGIN:VEVENT
UID:f9c02404-f865-41a3-a5b2-f3362a1bdd65
DTSTAMP:20210622T223733Z
CREATED:20210114T152410Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210405T160000Z
DTEND:20210405T170000Z
LAST-MODIFIED:20210402T124844Z
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:feff00a6-6399-411f-a0d9-4a95b1ab3ed5
DTSTAMP:20210622T223733Z
CREATED:20210114T150517Z
DESCRIPTION:Topic: Self-interacting neutrinos\, the Hubble parameter tensio
n\, and the Cosmic Microwave Background\n\nSpeakers: Thejs Brinckmann and
Adri Duivenvoorde\n\nAffiliation: Stony Brook University\; Princeton Unive
rsity\n\nAbstract 1: We perform a comprehensive study of cosmological\ncon
straints on non-standard neutrino self-interactions using cosmic\nmicrowav
e background (CMB) and baryon acoustic oscillation data. We\nconsider diff
erent scenarios for neutrino self-interactions\ndistinguished by the fract
ion of neutrino states allowed to\nparticipate in self-interactions and ho
w the relativistic energy\ndensity\, N_{eff}\, is allowed to vary. Specifi
cally\, we study cases in\nwhich: all neutrino states self-interact and N_
{eff} varies\; two\nspecies free-stream\, which we show alleviates tension
with laboratory\nconstraints\, while the energy in the additional interac
ting states\nvaries\; and a variable fraction of neutrinos self-interact w
ith either\nthe total N_{eff} fixed to the Standard Model value or allowed
to\nvary. In no case do we find compelling evidence for new neutrino\nint
eractions or non-standard values of N_{eff}. In several cases we\nfind add
itional modes with neutrino decoupling occurring at lower\nredshifts z_{de
c} ∼ 1e3−1e4. We do a careful analysis to examine\nwhether new neutrino se
lf-interactions solve or alleviate the\nso-called H_0 tension and find tha
t\, when all Planck 2018 CMB\ntemperature and polarization data is include
d\, none of these examples\nease the tension more than allowing a variable
N_{eff} comprised of\nfree-streaming particles. Although we focus on neut
rino interactions\,\nthese constraints are applicable to any light relic p
article.\n\nAbstract 2: Adri Duivenvoorden will do an informal presentatio
n of the\npaper https://arxiv.org/abs/2103.13334.\n
DTSTART:20210405T163000Z
DTEND:20210405T180000Z
LAST-MODIFIED:20210402T121337Z
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:5f7490a2-4b79-411b-b8ec-6e3dbd10cfa6
DTSTAMP:20210622T223733Z
CREATED:20201209T231758Z
DESCRIPTION:Topic: The Earth's Dynamo: a Mathematical Model\n\nSpeakers: S
usan Friedlander\n\nAffiliation: University of Southern California\; Membe
r\, School of Mathematics\n\nEarlier this semester we heard a fascinating
talk by James Stone\ndescribing how the equations of compressible magnetoh
ydrodynamics\n(MHD) can help us understand the Cosmos. Today we will retur
n to Earth\nand describe a mathematical model\, derived from the equations
of\nincompressible MHD\, that helps us understand the mechanism by which
\nthe motion of Earth’s fluid core creates and sustains the Earth’s\nmagne
tic field.\n
DTSTART:20210405T180000Z
DTEND:20210405T190000Z
LAST-MODIFIED:20210405T145036Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-1
END:VEVENT
BEGIN:VEVENT
UID:1376ba95-e17a-4736-8d6a-f7eb052cbe5a
DTSTAMP:20210622T223733Z
CREATED:20210105T212132Z
DESCRIPTION:Topic: Yang-Mills Instantons\, Quivers and Bows\n\nSpeakers: Se
rgey Cherkis\n\nAffiliation: University of Arizona\; Member\, School of Ma
thematics\n\nThe study of hyperkaehler manifolds of lowest dimension (and
of gauge\ntheory on them) leads to a chain of generalizations of the notio
n of a\nquiver: quivers\, bows\, slings\, and monowalls. This talk focuses
on\nbows\, their representations\, and solutions. In particular\, we\nfor
mulate a complete construction of Yang-Mills instantons on\nAsymptotically
Locally Flat (ALF) spaces.\n\nWe begin by generalizing Uhlenbeck's theore
m to the ALF case and\ncomputing the index of the instanton Dirac operator
. We formulate the\nbow construction of instantons and demonstrate that it
is complete.\nThis work is done in collaboration with Andres Larrain-Huba
ch and Mark\nStern.\n\nTime permitting\, we use this bow construction to d
escribe instanton\nmoduli space as a slice of the space of curves in $T\ma
thbb{P}^1$.\nThis leads to an explicit expression for the Kaehler potentia
l on the\ninstanton moduli space.\n
DTSTART:20210405T203000Z
DTEND:20210405T213000Z
LAST-MODIFIED:20210405T145344Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-143
END:VEVENT
BEGIN:VEVENT
UID:a257df55-2875-4b98-a5a1-33478f3528aa
DTSTAMP:20210622T223733Z
CREATED:20201211T184029Z
DESCRIPTION:Topic: How difficult is it to certify that a random 3SAT formul
a is unsatisfiable?\n\nSpeakers: Toniann Pitassi\n\nAffiliation: Universit
y of Toronto\; Visiting Professor\, School of Mathematics\n\nThe Satisfiab
ility problem is perhaps the most famous problem in\ntheoretical computer
science\, and significant effort has been devoted\nto understanding random
ly generated SAT instances. The random k-SAT\nmodel (where a random k-CNF
formula is chosen by uniformly selecting m\nclauses from the set of all po
ssible clauses on k distinct variables)\nis important for several reasons.
First\, it is an intrinsically\nnatural model analogous to random graph m
odels\, and closely related to\nphase transitions and structural phenomena
occurring in statistical\nphysics. Thus like random graph models\, unders
tanding the complexity\nof random SAT sheds light on fundamental structura
l properties of the\nsatisfiability problem. Secondly\, the random k-SAT d
istribution gives\nus a testbench of empirically hard examples which are u
seful for\ncomparing and analyzing SAT algorithms. Third\, the difficulty
of\ncertifying the unsatisfiability of a random k-SAT formula is connected
\nto several other central questions in complexity theory\, including the
\ncomplexity of approximately solving NP-hard problems\, and the\ncomplexi
ty of learning DNF formulas.\n\nWe will first review the fascinating world
of random structured\ndistributions (k-SAT\, k-CSP and random graph model
s)\, their threshold\nproperties\, empirical and theoretical results and c
onjectures about\ntheir complexity and structural properties. We then focu
s on the\nfollowing question: how difficult is it to certify that a given
random\nk-SAT formula is unsatisfiable (for a given proof system)? The cur
rent\nstate of affairs is perplexing. On the one hand\, Chvatal and Szemer
edi\nfamously proved exponential lower bounds for Resolution refutations o
f\nrandom k-SAT\, and more recently similar exponential lower bounds have
\nbeen shown for SOS (Sum-of-Squares) and Cutting Planes refutations.\nTak
en together these lower bounds prove that most state-of-the-art\nalgorithm
s will require exponential-time on random k-SAT instances. On\nthe other h
and\, current algorithms are unreasonably effective at\nsolving random k-S
AT instances! We will sketch the lower bound proofs\nfor Resolution and th
e recent lower bound for Cutting Planes\nrefutations for random formulas\,
and discuss the interesting web of\nconnections between the sunflower lem
ma in extremal combinatorics\,\nthreshold properties of random structures\
, proof complexity lower\nbounds\, and circuit lower bounds. \n
DTSTART:20210406T143000Z
DTEND:20210406T163000Z
LAST-MODIFIED:20210505T223344Z
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-476
END:VEVENT
BEGIN:VEVENT
UID:c31ba1b3-7cde-41f8-901f-29e9007531d6
DTSTAMP:20210622T223733Z
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:fffc480c-edd8-4666-9ead-d6d31e640710
DTSTAMP:20210622T223733Z
CREATED:20210105T221846Z
DESCRIPTION:Topic: Stratified étale homotopy theory and Galois categories\n
\nSpeakers: Zhiyu Zhang\n\nAffiliation: Massachusetts Institute of Technol
ogy\n\n
DTSTART:20210406T173000Z
DTEND:20210406T193000Z
LAST-MODIFIED:20210401T153218Z
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:631ac94a-9fbd-4d0b-8507-a5d2cb117a11
DTSTAMP:20210622T223733Z
CREATED:20210106T222157Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210406T190000Z
DTEND:20210406T210000Z
LAST-MODIFIED:20210402T140357Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-20
END:VEVENT
BEGIN:VEVENT
UID:eac23dea-e97b-493a-bf5f-49cc3b05439e
DTSTAMP:20210622T223733Z
CREATED:20210105T233304Z
DESCRIPTION:Topic: Approximations of infinite groups\n\nSpeakers: Goulnara
Arzhantseva \n\nAffiliation: Universität Wien\n\nWe discuss various (still
open) questions on approximations of\nfinitely generated groups\, focusin
g on finite-dimensional\napproximations such as residual finiteness and so
ficity. We survey our\nresults on the existence\, stability and quantifica
tion of metric\napproximations. We suggest a few conjectures\, e.g. on Gro
mov\nhyperbolic groups and their infinite monster limits.\n\nBased on join
t works with Liviu Paunescu (Bucharest).\n
DTSTART:20210407T150000Z
DTEND:20210407T161500Z
LAST-MODIFIED:20210407T131255Z
LOCATION:Remote Access
SUMMARY:Stability and Testability
URL:https://www.ias.edu/math/events/stability-and-testability-21
END:VEVENT
BEGIN:VEVENT
UID:4d702f3f-6b03-4348-b9ad-56e7a6e8c1c0
DTSTAMP:20210622T223733Z
CREATED:20210106T003136Z
DESCRIPTION:Topic: K-Motives and Koszul Duality in Geometric Representation
Theory\n\nSpeakers: Jens Eberhardt\n\nAffiliation: Max Planck Institute\n
\nPerverse sheaves and intersection cohomology are central objects in\ngeo
metric representation theory. This talk is about their long-lost\nK-theore
tic cousins\, called K-motives. We will discuss definitions and\nbasic pro
perties of K-motives and explore potential applications to\ngeometric repr
esentation theory. For example\, K-motives shed a new\nlight on Beilinson-
Ginzburg-Soergel's Koszul duality — a remarkable\nsymmetry in the represen
tation theory and geometry of two Langlands\ndual reductive groups. We wil
l see that this new form of Koszul\nduality does not involve any gradings
or mixed geometry which are as\nessential as mysterious in the classical a
pproaches.\n
DTSTART:20210407T190000Z
DTEND:20210407T210000Z
LAST-MODIFIED:20210401T195005Z
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:15fb76f4-268d-4e23-be41-1b257b40fa1c
DTSTAMP:20210622T223733Z
CREATED:20210106T005000Z
DESCRIPTION:Topic: For a given finite group G\, which spaces can be the fix
ed point set of a G-action on a given compact space?\n\nSpeakers: Sylvain
Cappell\n\nAffiliation: New York University\n\nWhich spaces can be the fix
ed point sets of actions of $G$ on finite\ncell-complexes of a given homot
opy type? The general answers to such\nquestions\, for $G$ not a group of
prime-power order\, will be\nexpressed\, even for non-simply-connected spa
ces\, just in terms of\nconditions on Euler characteristics\, These new re
sults generalize\nclassical work of R. Oliver. Time allowing\, we will als
o contrast\nthese results\, including for non-simply connected spaces\, to
quite\ndifferent kinds of results for some restricted kinds of actions\,
e.g.\,\nfor semi-free actions. All these results are joint with Shmuel\nWe
inberger (University of Chicago) and Min Yan (Hong Kong University\nof Sci
ence and Technology)\n
DTSTART:20210407T213000Z
DTEND:20210407T230000Z
LAST-MODIFIED:20210401T142519Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-208
END:VEVENT
BEGIN:VEVENT
UID:ada6e31b-8aa0-44a4-9c75-694b5d9ae501
DTSTAMP:20210622T223733Z
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:66e51b6f-3aa1-4317-bfbb-93e6b0ee63b1
DTSTAMP:20210622T223733Z
CREATED:20210113T164413Z
DESCRIPTION:Topic: Some Trends in Milky Way Research\n\nSpeakers: Ken Freem
an\n\nAffiliation: Australian National University\n\nSupported by new obse
rvational capabilities\, some of our basic\nconcepts in Milky Way research
have changed over the last several\nyears. Our growing appreciation of th
e central bar of the Milky Way\,\nthe radial migration of stars\, the Gala
ctic thick disk\, and the\nlargescale departures from equilibrium of the M
ilky Way provide new\nchallenges and opportunities which I plan to review.
\n
DTSTART:20210408T150000Z
DTEND:20210408T160000Z
LAST-MODIFIED:20210329T120905Z
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:c4f0e89d-85eb-4ee3-969a-b46c783e2987
DTSTAMP:20210622T223733Z
CREATED:20210107T005109Z
DESCRIPTION:Topic: Representations of quantum groups at roots of 1\n\nSpeak
ers: Jize Yu\n\nAffiliation: Member\, School of Mathematics\n\nWe discuss
modular representations of reductive algebraic groups and\nthen proceed to
representations of quantum groups at roots of unity\n
DTSTART:20210408T200000Z
DTEND:20210408T220000Z
LAST-MODIFIED:20210408T141832Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-9
END:VEVENT
BEGIN:VEVENT
UID:abb3afaa-5cd6-434c-ad49-98ca76bfecff
DTSTAMP:20210622T223733Z
CREATED:20210106T011232Z
DESCRIPTION:Topic: Low moments of character sums\n\nSpeakers: Adam Harper
\n\nAffiliation: University of Warwick\n\nSums of Dirichlet characters $\s
um_{n \leq x} \chi(n)$ (where $\chi$\nis a character modulo some prime $r$
\, say) are one of the best studied\nobjects in analytic number theory. Th
eir size is the subject of\nnumerous results and conjectures\, such as the
Pólya-Vinogradov\ninequality and the Burgess bound. One way to get inform
ation about\nthis is to study the power moments $\frac{1}{r-1} \sum_{\chi
\\n\text{mod}\ r} |\sum_{n \leq x} \chi(n)|^{2q}$\, which turns out to be
\nquite a subtle question that connects with issues in probability and\nph
ysics. In this talk I will describe an upper bound for these moments\nwhen
$0 \leq q \leq 1$. I will focus mainly on the number theoretic\nissues ar
ising.\n
DTSTART:20210408T203000Z
DTEND:20210408T213000Z
LAST-MODIFIED:20210408T142111Z
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:9df5e718-09f9-4ed6-af9d-295b6baaac02
DTSTAMP:20210622T223733Z
CREATED:20210106T022053Z
DESCRIPTION:Topic: Relative quantum cohomology and other stories\n\nSpeaker
s: Sara Tukachinsky\n\nAffiliation: Member\, School of Mathematics\n\nWe d
efine a quantum product on the cohomology of a symplectic manifold\nrelati
ve to a Lagrangian submanifold\, with coefficients in a Novikov\nring. The
associativity of this product is equivalent to an open\nversion of the WD
VV equations for an appropriate disk superpotential.\nBoth structures — th
e quantum product and the WDVV equations — are\nconsequences of a more gen
eral structure we call the tensor potential\,\nwhich will be the main focu
s of this talk. This is joint work with\nJake Solomon.\n
DTSTART:20210409T131500Z
DTEND:20210409T144500Z
LAST-MODIFIED:20210401T171722Z
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:72a49fd7-bca3-4f65-8393-a2ba77b28584
DTSTAMP:20210622T223733Z
CREATED:20210310T200210Z
DESCRIPTION:Topic: A Virtual Open House to Krateros.\n\nSpeaker: DR. AARON
HERSHKOWITZ\, Manager Krateros Project\, Institute\nfor Advanced Study\n\n
The Institute for Advanced Study holds one of the largest collections\nof
epigraphic squeezes (paper negatives of inscribed stones) in the\nworld. O
n April 9th\, join Dr. Aaron Hershkowitz\, manager of the\nKrateros Projec
t\, for a behind-the-scenes tour of the Meritt Library\,\nhome to both the
squeeze collection and the digitization effort. Last\nyear the National E
ndowment for the Humanities awarded the project a\nprestigious grant to co
ntinue to digitize that collection. Attendees\nwill not only get to see th
e various materials housed in the Meritt\nLibrary\, but will also get a gl
impse into the process of scanning\nthose squeezes. The tour will conclude
with a question and answer\nperiod led by Dr. Hershkowitz.\n\nAbout Krate
ros: https://www.ias.edu/krateros\n\nREGISTER IN ADVANCE FOR THIS WEBINAR
here\n[//theias.zoom.us/meeting/register/tZcucO6qrzMtGdGq8wTqpYVeeHO2G-bN2
aGB].\nAfter registering\, you will receive a confirmation email containin
g\ninformation about joining the webinar.\n\nFor additional information em
ail ds@ias.edu.\n
DTSTART:20210409T150000Z
DTEND:20210409T150000Z
LAST-MODIFIED:20210315T131808Z
LOCATION:Online
SUMMARY:Digital Scholarship Conversations
URL:https://www.ias.edu/digital-scholarship/events/digital-scholarship-conv
ersations-1
END:VEVENT
BEGIN:VEVENT
UID:f0e5f918-e4f3-40d5-a648-e70a6b2f8e5a
DTSTAMP:20210622T223733Z
CREATED:20210407T130259Z
DESCRIPTION:Topic: B-mode Constraint from SPIDER's First Flight\n\nSpeakers
: Xue (Sherry) Song\, Joseph van der List\, and Corwin Shiu Princeton Univ
ersity\n\nAffiliation: Princeton University\n\nSPIDER is a balloon-borne t
elescope designed to map the B-mode\npolarization of the cosmic microwave
background (CMB) on degree\nangular scales. SPIDER’s 2015 flight mapped 4.
8% of the sky at 95\nand 150 GHz. In this talk\, we report the results of
internal\nconsistency tests performed on the data to control against\ninst
rumental systematics\, and discuss the two independent\nforeground-removal
techniques employed to account for Galactic\nemission. The primary foregr
ound subtraction method uses a dust\ntemplate derived from Planck data. Th
e second approach is a joint\nanalysis of SPIDER and Planck data in the ha
rmonic domain. We derive\n95% upper limits on the primordial tensor-to-sca
lar ratio\, finding r <\n0.11 (Feldman–Cousins) and r < 0.19 (Bayesian).\n
DTSTART:20210409T160000Z
DTEND:20210409T170000Z
LAST-MODIFIED:20210407T130402Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-group-semin
ar-0
END:VEVENT
BEGIN:VEVENT
UID:7110bd7d-6989-421c-9f95-c987af3811bb
DTSTAMP:20210622T223733Z
CREATED:20210422T101943Z
DESCRIPTION:Topic: Topic 1: The projected impact of commercial satellite co
nstellations on ground-based astronomy Topic 2: The DMRadio Experiment at
Princeton\n\nSpeakers: Speaker 1: Sarah Marie Bruno Speaker 2: Roman Kolev
atov\n\nAffiliation: Princeton University\n\nAbstract 1: The ongoing comme
rcialization of satellite technology is\nleading to the ubiquity of privat
ely owned and operated satellite\nspacecraft in low-Earth orbits. These sa
tellites can be used for data\ncollection for a variety of commercially vi
able applications including\nlow-cost global internet access\, time-share
for academic researchers\nin fields such as astronomy and climate change\,
and access for\ngovernment agencies for various applications. As of May 2
020\, there\nwere an estimated 2200 satellites in low-Earth orbits\, a num
ber that\nhas grown within the past year. Several commercial companies pla
n to\nlaunch mega-constellations of small satellites for high-speed\nbroad
band satellite internet\, including SpaceX's _Starlink_ project\,\nwhich w
ill launch 42\,000 satellites. While there are many projected\nsocietal be
nefits of the upcoming commercial satellite initiatives\,\nincreasing sate
llite prevalence will undoubtedly impact ground-based\nastronomy. Some sat
ellites may transmit in low-frequency bands that\ninterfere with radio ast
ronomy. Additionally\, satellites in certain\norbits may reflect sunlight\
, impeding the ability of ground-based\ntelescopes to observe in the visib
le spectrum. The future of\nground-based projects is uncertain. I will des
cribe the expected\nimpact of commercial satellites on ground-based astron
omy and\nhighlight several proposals for mitigating this effect.\n\nAbstra
ct 2: Axions are hypothetical particles initially introduced to\nsolve the
strong CP problem of QCD. Simultaneously\, axions are a\ncompelling dark
matter candidate\, which has resulted in the proposal\nof detectors to sea
rch for them. The Dark Matter Radio experiment is a\nQCD axion\, and axion
-like particles search in a substantive range of\nmasses from peV to micro
-eV. We will discuss one of the efforts of the\nDMRadio collaboration at P
rinceton\, which involves designing and\ntesting a high-Q (>10^6) lumped-e
lement resonator operating at\ncryogenic temperatures to enhance the axion
signal.\n
DTSTART:20210409T160000Z
DTEND:20210409T170000Z
LAST-MODIFIED:20210422T102628Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-group-semin
ar-1
END:VEVENT
BEGIN:VEVENT
UID:cd4cd0df-4d23-42d7-88ec-8e3a3253fbba
DTSTAMP:20210622T223733Z
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:13fb783c-84f7-40a7-93fc-ca9af8721bc9
DTSTAMP:20210622T223733Z
CREATED:20210219T150424Z
DESCRIPTION:Topic: A Comparison of Circumgalactic MgII Absorption between t
he TNG50 Simulation and the MEGAFLOW Survey\n\nSpeakers: Daniel DeFelippis
\n\nAffiliation: Columbia University\n\nEach week\, we hold a relatively i
nformal seminar/discussion series\nwith an emphasis on extra-galactic and
large-scale structure\nastrophysics.\n\nDuring Galread a leader/visitor pr
esents a recent paper to the\ndiscussion group. The PDF of the paper is pr
ojected 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 -- n
o\npowerpoint-style slides. Galread discussions are very friendly and\nint
eractive.\n
DTSTART:20210412T150000Z
DTEND:20210412T160000Z
LAST-MODIFIED:20210326T125629Z
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:bc8853e2-85e2-45db-ac52-108648f82371
DTSTAMP:20210622T223733Z
CREATED:20201211T183141Z
DESCRIPTION:Topic: Privacy as Stability\, for Generalization \n\nSpeakers:
Katrina Legitt\n\nAffiliation: Hebrew University\n\nMany data analysis pip
elines are adaptive: the choice of which\nanalysis to run next depends on
the outcome of previous analyses.\nCommon examples include variable select
ion for regression problems and\nhyper-parameter optimization in large-sca
le machine learning problems:\nin both cases\, common practice involves re
peatedly evaluating a series\nof models on the same dataset. Unfortunately
\, this kind of adaptive\nre-use of data invalidates many traditional meth
ods of avoiding\noverfitting and false discovery\, and has been blamed in
part for the\nrecent flood of non-reproducible findings in the empirical s
ciences.\nAn exciting line of work beginning with Dwork et al. in 2015\nes
tablishes the first formal model and first algorithmic results\nproviding
a general approach to mitigating the harms of adaptivity\,\nvia a connecti
on to the notion of differential privacy.\n\nIn this talk\, we'll explore
the notion of differential privacy and\ngain some understanding of how and
why it provides protection against\nadaptivity-driven overfitting. Many i
nteresting questions in this\nspace remain open.\n\nJoint work with: Chris
topher Jung (UPenn)\, Seth Neel (Harvard)\, Aaron\nRoth (UPenn)\, Saeed Sh
arifi-Malvajerdi (UPenn)\, and Moshe Shenfeld\n(HUJI). This talk will draw
on work that appeared at NeurIPS 2019 and\nITCS 2020.\n
DTSTART:20210412T151500Z
DTEND:20210412T161500Z
LAST-MODIFIED:20210412T115352Z
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:48753c9e-eca1-4cd1-bfc2-8d42a03b49fd
DTSTAMP:20210622T223733Z
CREATED:20210114T152443Z
DESCRIPTION:Topic: New directions in planetesimal formation via the streami
ng instability\n\nSpeakers: Phil Armitage\n\nAffiliation: Stony Brook Univ
ersity/Flatiron Institute\n\nThe streaming instability of particles and ga
s in protoplanetary disks\nis probably now the favored theoretical model f
or building\nplanetesimals. It finds support from Kuiper Belt observations
\, and\nthere are reasonable prospects for using it as part of predictive
\nmodels for where and when planetesimals form in different disks. There\n
remain\, however\, quite basic uncertainties. I'll discuss some recent\nre
sults on the predicted mass function\, on the effect of turbulence\,\nand
on the role of particle size distributions\, together with ideas\nfor futu
re directions.\n
DTSTART:20210412T160000Z
DTEND:20210412T170000Z
LAST-MODIFIED:20210409T123842Z
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:73581b62-bca9-401f-8a0b-2958bc89d6a7
DTSTAMP:20210622T223733Z
CREATED:20210114T150545Z
DESCRIPTION:Topic: How\, and how not\, to obtain the redshift distribution
from probabilistic photometric redshifts\n\nSpeakers: Alex Malz\n\nAffilia
tion: German Centre of Cosmological Lensing\n\nAbstract: The cosmological
impact of current and upcoming photometric\ngalaxy surveys is contingent o
n our ability to obtain redshift\nestimates for large numbers of faint gal
axies. In the absence of\nspectroscopically confirmed redshifts\, broad-ba
nd photometric redshift\npoint estimates (photo-zs) have been superseded b
y photo-z probability\ndensity functions (PDFs) that encapsulate their non
trivial\nuncertainties. Traditional applications of photo-z PDFs in weak\n
gravitational lensing studies of cosmology have employed\ncomputationally
straightforward stacking methodologies for obtaining\nthe redshift distrib
ution function N(z) that violate the laws of\nprobability. In response\, m
athematically self-consistent models\,\nincluding but not limited to that
of Malz & Hogg (2020)\n[https://arxiv.org/abs/2007.12178]\, have been prop
osed in an effort to\nanswer the question\, 'What is the right way to obta
in the redshift\ndistribution function N(z) from a catalog of photo-z PDFs
?'' In this\ntalk\, corresponding to Malz (2021)\n[https://arxiv.org/abs/2
101.04675]\, I motivate adoption of such\nprincipled methods by addressing
the contrapositive of the more common\npresentation of such models\, answ
ering the question\, 'Under what\nconditions do established stacking metho
ds successfully recover the\ntrue redshift distribution function N(z)?'' B
y exploring a series of\nmathematical thought experiments\, I identify two
such conditions that\nwere only weakly violated in the past but will be s
trongly violated by\nfuture galaxy surveys.\n
DTSTART:20210412T163000Z
DTEND:20210412T180000Z
LAST-MODIFIED:20210408T131130Z
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:f9158f82-68e9-464a-9748-c3d51a6b73c6
DTSTAMP:20210622T223733Z
CREATED:20210401T215530Z
DESCRIPTION:Topic: Character bounds for finite simple groups\n\nSpeakers: P
ham Tiep\n\nAffiliation: Rutgers University\; Member\, School of Mathemati
cs\n\nGiven the current knowledge of complex representations of finite\nsi
mple groups\, obtaining good upper bounds for their characters values\nis
still a difficult problem\, a satisfactory solution of which would\nhave s
ignificant implications in a number of applications. We first\ndiscuss som
e such applications. Then we will report on recent results\nthat produce s
uch character bounds.\n
DTSTART:20210412T180000Z
DTEND:20210412T190000Z
LAST-MODIFIED:20210412T115658Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-2
END:VEVENT
BEGIN:VEVENT
UID:4aae742a-2eb6-401c-a4ce-74237dd06a70
DTSTAMP:20210622T223733Z
CREATED:20210308T160636Z
DESCRIPTION:Topic: Long time dynamics of 2d Euler and nonlinear inviscid da
mping\n\nSpeakers: Hao Jia\n\nAffiliation: University of Minnesota\n\nIn t
his talk\, we will discuss some joint work with Alexandru Ionescu\non the
nonlinear inviscid damping near point vortex and monotone shear\nflows in
a finite channel. We will put these results in the context of\nlong time b
ehavior of 2d Euler equations and indicate further\nimportant open problem
s in the field.\n
DTSTART:20210412T203000Z
DTEND:20210412T213000Z
LAST-MODIFIED:20210412T120004Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-144
END:VEVENT
BEGIN:VEVENT
UID:2ed5cf15-ddcf-4b1a-9d0d-320682789224
DTSTAMP:20210622T223733Z
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:7d8e6d8c-8288-4b6f-92b7-0e6766a7b7d6
DTSTAMP:20210622T223733Z
CREATED:20210318T201528Z
DESCRIPTION:Topic: Pyknotic/condensed mathematics and ℓ-adic exodromy theor
em\n\nSpeakers: Linus Hamann\n\nAffiliation: Princeton University\n\n
DTSTART:20210413T173000Z
DTEND:20210413T193000Z
LAST-MODIFIED:20210409T190653Z
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-23
END:VEVENT
BEGIN:VEVENT
UID:6d165417-ae11-444a-b52d-fbe29629318d
DTSTAMP:20210622T223733Z
CREATED:20210407T142715Z
DESCRIPTION:Topic: Meldings and the codimension-three conjecture\n\nSpeaker
s: Kari Vilonen\n\nAffiliation: University of Melbourne\n\nI will start by
recalling the notion of microlocal perverse sheaves\nand then briefly exp
lain meldings. The rest of the talk is devoted to\nexplaining the ideas in
volved in the proof of the codimension-three\nconjecture.\n
DTSTART:20210413T220000Z
DTEND:20210414T000000Z
LAST-MODIFIED:20210409T172610Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-21
END:VEVENT
BEGIN:VEVENT
UID:d33adc65-350e-47df-b507-b6a61d3d6f9d
DTSTAMP:20210622T223733Z
CREATED:20210114T163304Z
DESCRIPTION:Topic: Precambrian Meteor Impacts and Implications for Early Ea
rth.\n\nSpeakers: Alexandra Kroll Davatzes\n\nAffiliation: Temple Universi
ty\n\nAlong about 65 million years ago\, at the end of the Cretaceous peri
od\,\nan asteroid impact initiated a mass extinction that\, among other\nt
hings\, is famously thought to have ended the reign of the dinosaurs.\nLes
s well known are even larger impact events that took place between\n3.5 to
2.3 billion years ago. Prof. Davatzes will talk about 18\nspherule beds i
dentified in rocks in western Australia and South\nAfrica that represent 1
3 separate impact events that would have local\,\nregional\, and global ef
fects lasting seconds to decades after the\nimpacts. Particularly large im
pacts\, such as those in the Precambrian\,\nmay have resulted in: (1) eart
hquakes\, large-scale tsunamis\, thermal\neffects\, and distal ejecta reen
try\; (2) ejection of rock vapor\, dust\,\nsoot\, carbon dioxide\, water v
apor\, methane\, and sulfur oxides into the\natmosphere\, resulting in atm
ospheric heating and acid rain formation\;\n(3) evaporation in the oceans\
, leading to destruction of shallow water\necosystems and to hot salty sur
face waters\; and (4) delivery of\nelements essential to life or transient
high oxygen concentration that\nmight have led to biodiversification. In
addition\, discovery and\nconfirmation of these impact layers is critical
for our understanding\nof the rate of impacts to the early Earth and solar
system. This is\ngaining importance as researchers revisit and redefine t
he concept of\na Late Heavy Bombardment.\n
DTSTART:20210413T233000Z
DTEND:20210414T013000Z
LAST-MODIFIED:20210331T125107Z
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:712a6334-35ee-4a10-97b3-d31dded636e6
DTSTAMP:20210622T223733Z
CREATED:20210115T144306Z
DESCRIPTION:Topic: Feeding a Protostar with 10\,500 au Scale Streamers\n\nS
peakers: Jaime Pineda\n\nAffiliation: Max Planck Institute for Extraterres
trial Physics\, Garching\n\nDense cores are the places where stars are for
med within the\nsupersonic Molecular Clouds. These dense regions (n~10^5 c
c) are cold\n(T~10 K) and display subsonic levels of turbulence (Mach ~ 0.
5)\, and\nrepresent the initial conditions for both star and disk formatio
n.\nHowever\, the influence of the parental core properties on the disk\nf
ormation process is still not well constrained\, and it is therefore\ncruc
ial to study dense cores with interferometers to better understand\nthe de
nse core and disk connection. We present NOEMA\nobservations of a Class 0
object\, which has been suggested to\npresent a disk under gravitational i
nstability (GI) (asymmetrical\nfeatures in ALMA high resolution dust conti
nuum emission). Our new\ndata reveal a previously unseen large scale (~10\
,000 au)\nstreamer of fresh gas from the surrounding dense core down to th
e\ndisk scales. This streamer is perpendicular to the outflow\, and it\nco
ntains material with subsonic levels of turbulence\, and therefore\nunpert
urbed by the outflow. We model the position and velocities using\na free-f
alling streamline\, and we estimate an infall rate comparable\nto the accr
etion rate onto the protostar. This clearly shows that\naccretion via stre
amer can be have an important role in the disk\nformation. Moreover\, thes
e results show that previously observed disk\nasymmetries could also be dr
iven by large scale asymmetric flows\ninstead of GI. This result shows the
power and\nimportance of studying dense cores with interferometers to pro
vide a\ncomplete and proper picture of star and disk formation.\n
DTSTART:20210414T150000Z
DTEND:20210414T160000Z
LAST-MODIFIED:20210409T132452Z
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:ddff8363-26c4-4feb-9a2b-50e943d45b28
DTSTAMP:20210622T223733Z
CREATED:20200922T211239Z
DESCRIPTION:Topic: Bibliotheca Arabica: A Digital Home for the Arabic Manus
cript Tradition\n\nSPEAKERS:\nVERENA KLEMM (Institute of Arabic Studies\,
University of Leipzig\,\nGermany)\nSTEFANIE BRINKMANN(Sächsische Akademie
der Wissenschaften zu Leipzig)\nBORIS LIEBRENZ (Sächsische Akademie der Wi
ssenschaften zu Leipzig)\nTHOMAS EFER (Sächsische Akademie der Wissenschaf
ten zu Leipzig)\n\nRegister in advance for this webinar here\n[https://the
ias.zoom.us/webinar/register/WN_7TPbcHWTS-2oJr4LhD4OIw].\nAfter registerin
g\, you will receive a confirmation email containing\ninformation about jo
ining the webinar.\n
DTSTART:20210414T160000Z
DTEND:20210414T173000Z
LAST-MODIFIED:20210409T135125Z
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:a866c0f0-785c-465f-8f1c-c556e9daece9
DTSTAMP:20210622T223733Z
CREATED:20210409T001906Z
DESCRIPTION:Topic: Microlocal sheaves on certain affine Springer fibers\n\n
Speakers: Zhiwei Yun\n\nAffiliation: Massachusetts Institute of Technology
\n\nFor homogeneous affine Springer fibers (those with $G_m$ symmetry)\, w
e\nrealize them as Lagrangian cycles inside ambient symplectic varieties\,
\nand make sense of microlocal sheaves supported on these affine\nSpringer
fibers. We also propose a conjectural equivalence between the\nmicrolocal
sheaf category and a coherent sheaf category in terms of\nSpringer fibers
for the Langlands dual group\, and are able to prove\nthe conjecture in s
ome cases. This is joint work with Roman\nBezrukavnikov\, Pablo Boixeda Al
varez and Michael McBreen.\n
DTSTART:20210414T190000Z
DTEND:20210414T210000Z
LAST-MODIFIED:20210409T002155Z
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-26
END:VEVENT
BEGIN:VEVENT
UID:4654d2d2-90a3-46df-a00d-a6960e8c98d7
DTSTAMP:20210622T223733Z
CREATED:20210329T181849Z
DESCRIPTION:Topic: Embedding Symplectic Ellipsoids and Diophantine equation
s\n\nSpeakers: Dusa McDuff\n\nAffiliation: Barnard College\, Columbia Univ
ersity\n\nThis talk will explain work stemming from a group project that\n
investigated the ellipsoidal embedding capacity function for the\nfamily o
f Hirzebruch surfaces. This problem turns out to have\nunexpected arithmet
ic structure\, leading to an intricate fractal\npattern of interweaving st
aircases. To my knowledge\, it is the first\nexample of this kind. The tal
k will be descriptive and elementary.\n
DTSTART:20210414T213000Z
DTEND:20210414T230000Z
LAST-MODIFIED:20210409T210403Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-209
END:VEVENT
BEGIN:VEVENT
UID:30762781-877a-4ddf-b1fe-f68c91eb3b22
DTSTAMP:20210622T223733Z
CREATED:20210409T210811Z
DESCRIPTION:
DTSTART:20210415T140000Z
DTEND:20210415T160000Z
LAST-MODIFIED:20210409T210840Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-25
END:VEVENT
BEGIN:VEVENT
UID:b784b584-9290-4818-b273-bc50913eba8f
DTSTAMP:20210622T223733Z
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\nUltralight axions have gaine
d great relevance in modern cosmology\,\nbecoming a promising candidate to
describe the dark matter of the\nUniverse. Axion models in which the scal
ar field potential includes\nonly the quadratic term\, usually referred as
the free case\, have been\nextensively studied in the literature. A disti
nctive signature of\nthese models\, with respect to the standard cold dark
matter\, is the\npresence of a cut-off in the mass power spectrum and the
prediction of\ncored density dark matter halos. However\, such models do
not capture\nall the implications that arise when including a full axion p
otential.\nIn this talk\, I will discuss some results of studies of the\nc
osmological evolution of linear perturbations\, and its comparison to\nthe
cold dark matter and the free case\, which reveals an enhancement\nin the
amplitude of the mass power spectrum just before the cut-off\nscale\, due
to the non–linearity of the axion–like potential. As\nwell\, I will discu
ss current and future observational constraints that\ncould help us assess
the importance of self-interactions.\n
DTSTART:20210415T150000Z
DTEND:20210415T160000Z
LAST-MODIFIED:20210331T125405Z
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:8018babd-23ab-440c-adcc-536a83ee5bf2
DTSTAMP:20210622T223733Z
CREATED:20210409T172704Z
DESCRIPTION:Topic: Representations of quantum groups at roots of 1\n\nSpeak
ers: Jize Yu\n\nAffiliation: Member\, School of Mathematics\n\nContinuatio
n from last time.\n
DTSTART:20210415T200000Z
DTEND:20210415T220000Z
LAST-MODIFIED:20210415T215802Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-10
END:VEVENT
BEGIN:VEVENT
UID:8d229b14-39a3-4459-a29f-9e5796c52403
DTSTAMP:20210622T223733Z
CREATED:20210405T181837Z
DESCRIPTION:Topic: Beilinson-Bloch conjecture for unitary Shimura varieties
\n\nSpeakers: Chao Li\n\nFor certain automorphic representations $\pi$ on
unitary groups\, we\nshow that if $L(s\, \pi)$ vanishes to order one at th
e center $s=1/2$\,\nthen the associated $\pi$-localized Chow group of a un
itary Shimura\nvariety is nontrivial. This proves part of the Beilinson-Bl
och\nconjecture for unitary Shimura varieties\, which generalizes the BSD
\nconjecture. Assuming Kudla's modularity conjecture\, we further prove\nt
he arithmetic inner product formula for $L'(1/2\, \pi)$\, which\ngeneraliz
es the Gross-Zagier formula. We will motivate these\nconjectures and discu
ss some aspects of the proof. We will also\nmention recent extensions appl
icable to symmetric power L-functions of\nelliptic curves. This is joint w
ork with Yifeng Liu.\n
DTSTART:20210415T203000Z
DTEND:20210415T213000Z
LAST-MODIFIED:20210415T225319Z
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-447
END:VEVENT
BEGIN:VEVENT
UID:8fc602a8-5e6c-43f0-8b31-815dd3453749
DTSTAMP:20210622T223733Z
CREATED:20210405T143559Z
DESCRIPTION:Topic: Three 20 minute research talks\n\nSpeakers: Maxim Jeffs\
, Côme Dattin\, Bingyu Zhang\n\nAffiliation: Harvard University\; Universi
ty of Nante\; Université Grenoble Alpes\n\nMAXIM JEFFS (HARVARD)\, Mirror
symmetry and Fukaya categories of\nsingular varieties\n\nIn this talk I wi
ll explain Auroux' definition of the Fukaya category\nof a singular hypers
urface and two results about this definition\,\nillustrated with some exam
ples. The first result is that Auroux'\ncategory is equivalent to the Fuka
ya-Seidel category of a\nLandau-Ginzburg model on a smooth variety\; the s
econd result is a\nhomological mirror symmetry equivalence at certain larg
e complex\nstructure limits. I will also discuss ongoing work on generaliz
ations.\n\nCÔME DATTIN (NANTES)\, Wrapped sutured Legendrian homology and
the\nconormal of braids\n\nIn this talk we will discuss invariants of sutu
red Legendrians. A\nsutured contact manifold can be seen as either general
izing the\ncontactisation of a Liouville domain\, or as a presentation of
a\ncontact manifold with convex boundary. Using the first point of view\,
\nwe define the wrapped sutured homology of Legendrians with boundary\,\ne
mploying ideas coming from Floer theory. To illustrate the second\naspect\
, we apply the unit conormal construction to braids with two\nstrands\, wh
ich yields a sutured Legendrian. We will show that\, if the\nconormals of
two 2-braids are Legendrian isotopic\, then the braids are\nequivalent.\n
\nBINGYU ZHANG (INSTITUT FOURIER\, UNIVERSITÉ GRENOBLE ALPES)\,\nCapacitie
s from the Chiu-Tamarkin complex\n\nIn this talk\, we will discuss the Chi
u-Tamarkin complex. It is a\nsymplectic/contact invariant that comes from
the microlocal sheaf\ntheory. I will explain how to define some capacities
using the\nChiu-Tamarkin complex in both symplectic and contact situation
s. The\nmain result is the structure theorem of the Chiu-Tamarkin complex
of\nconvex toric domains. Consequently\, we can compute the capacities of
\nconvex toric domains.\n
DTSTART:20210416T131500Z
DTEND:20210416T144500Z
LAST-MODIFIED:20210405T151601Z
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-67
END:VEVENT
BEGIN:VEVENT
UID:c7beb7f3-1282-413f-b0d0-356b1689ad9b
DTSTAMP:20210622T223733Z
CREATED:20210205T161319Z
DESCRIPTION:Topic: Phenomenology and theory of galactic cosmic-ray propagat
ion\n\nSpeakers: Carmelo Evoli\n\nAffiliation: Gran Sasso Science Institut
e\n\nCosmic rays are the most energetic particles in the local Universe as
\nthey are known to reach energies above few Joules. How and where they\na
re produced have been a science puzzle for several decades now\, whose\nso
lution has been driving the rising of multi-messenger astrophysics\nas wel
l as novel theoretical approaches. Of particular interest is\nthe energy r
ange below ~PeV as we expect that these particles have\nbeen all accelerat
ed in the most extreme objects in our own\nGalaxy. Additionally\, the past
decade has seen an unprecedented\nimprovement in the quality and quantity
of data about their energy\nspectrum and chemical composition\, allowing
us to infer global\nproperties as the galactic grammage and the average re
sidence time.\nThese quantities are crucial to test any more fundamental d
escription\nof the transport of charged particles in the interstellar\npla
sma. Even more thrilling\, these new measurements\, together with a\ndeepe
r scrutiny of the diffuse gamma-ray emission from the Galactic\nplane\, ha
ve revealed unexpected new features in the cosmic-ray\nelemental spectra t
hat are challenging the commonly accepted scenario\nof how these particles
are energized and propagate through\ninterstellar space.\nIn my talk I wi
ll provide an overview of these recent ﬁndings\, and\ndiscuss some of the
new ideas proposed to explain these anomalies.\n
DTSTART:20210416T163000Z
DTEND:20210416T180000Z
LAST-MODIFIED:20210407T145731Z
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:3972fa7b-21e6-42eb-92b8-e97002f04eec
DTSTAMP:20210622T223733Z
CREATED:20210115T163015Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210416T190000Z
DTEND:20210416T200000Z
LAST-MODIFIED:20210409T131008Z
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:34091c48-6ece-4c8e-ad17-f0829c98f129
DTSTAMP:20210622T223733Z
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:20210416T190000Z
DTEND:20210416T200000Z
LAST-MODIFIED:20210416T211108Z
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:05636d07-e432-4d55-880b-c5daec8f1891
DTSTAMP:20210622T223733Z
CREATED:20210317T140315Z
DESCRIPTION:Topic: A Measurement of the Galactic Plane Mass Density from Bi
nary Pulsar Accelerations\n\nSpeakers: Sukanya Chakrabarti\n\nAffiliation:
Rochester Institute of Technology/IAS\n\nEach week\, we hold a relatively
informal seminar/discussion series\nwith an emphasis on extra-galactic an
d 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 greater\ndetail than may be explained within the text of t
he article. To aid\nwith discussion\, only the article PDF is presented --
no\npowerpoint-style slides. Galread discussions are very friendly and\ni
nteractive.\n
DTSTART:20210419T150000Z
DTEND:20210419T160000Z
LAST-MODIFIED:20210416T111242Z
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-10
END:VEVENT
BEGIN:VEVENT
UID:9d7b0a26-2638-4096-9efe-93db778e6213
DTSTAMP:20210622T223733Z
CREATED:20210114T152525Z
DESCRIPTION:Topic: Planet Formation and the Composition of Rocky Planets\n
\nSpeakers: Amy Bonsor\n\nAffiliation: Institute of Astronomy\, University
of Cambridge\n\nThe composition of a rocky planet tells us about the stru
cture of the\nplanet\, its geology\, what it might be like on the surface
and\nultimately whether or not it hosts life. Identifying the key processe
s\nduring planet formation that control composition is crucial to\nunderst
anding exoplanets\, particularly as we start to detect many more\nrocky pl
anets in the coming decades. White dwarfs that have accreted\nplanetary ma
terial provide a unique window onto the composition of\nexoplanetary bodie
s. My talk will focus on how we can use the ratios\nof key species such as
Ca/Mg\, Ca/Fe observed in the white dwarf\natmospheres to learn about pla
net formation. I will discuss\nobservational evidence for a match between
the compositions of\nplanet-host stars and planets (Bonsor et al\, 2021).
I will explore how\nthese observations of planetary material in the atmosp
heres of white\ndwarfs can tell us about how planetary bodies lose volatil
es and form\niron cores\, exploring the geology of exoplanetary systems (H
arrison et\nal\, 2021b). I will present observational evidence (based on M
n/Na)\nthat rocky planetary bodies in exoplanetary systems lost volatiles
\nboth during the initial phase of grain growth\, whilst embedded in the\n
nebula gas and later in the system's evolution\, post-nebula\, due to\nhea
ting from impacts (Harrison et al\, 2021a).\n
DTSTART:20210419T160000Z
DTEND:20210419T170000Z
LAST-MODIFIED:20210415T170505Z
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:bf140b22-0062-4342-9a78-c3c582d07969
DTSTAMP:20210622T223733Z
CREATED:20210114T150616Z
DESCRIPTION:Topic: Exploring Fundamental Physics with Friends and Neighbors
\n\nSpeakers: Zachary Slepian\n\nAffiliation: Florida University\n\n \n\nA
bstract: In this talk I will outline both the underlying theory and\nnovel
methods being developed by my group to enable Dark Energy\nSpectroscopic
Instrument (DESI\; 30 M galaxy spectra\, 2020-2025) to\nreveal the dark (e
nergy) and the invisible (neutrino mass). Dark\nenergy drives cosmic expan
sion\, so measuring the Universe's expansion\nhistory constrains dark ener
gy. I will present an ambitious agenda\nbeing undertaken by my group: how
can we use 3\, 4\, 5\, and 6-point\nfunctions to maximize the leverage of
DESI on dark energy? I will show\nsome preliminary measurements of these
functions using a\ntransformative algorithm my group has developed\, based
on angular\nmomentum decomposition tools drawn from particle physics. In
the last\npart of my talk\, I will move to neutrinos\, whose mass can be m
easured\nfrom their imprint on galaxy clustering. I will show a simple\,\n
analytic picture of both the development of neutrinos' spatial\ndistributi
on in the early Universe\, and of their late-time effects on\nthe matter.
I will close with mentioning a novel neutrino signature in\nthe galaxy 3-p
oint function identified by my group which will increase\nDESI's likelihoo
d of making the first actual measurement of the\nneutrino mass.\n
DTSTART:20210419T163000Z
DTEND:20210419T180000Z
LAST-MODIFIED:20210416T105833Z
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:724f62ed-6489-43e0-b30c-f82e8c3b0647
DTSTAMP:20210622T223733Z
CREATED:20210408T163627Z
DESCRIPTION:Topic: No seminar: Morse Lecture\n\n
DTSTART:20210419T180000Z
DTEND:20210419T190000Z
LAST-MODIFIED:20210408T163808Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-3
END:VEVENT
BEGIN:VEVENT
UID:84f52776-7e42-4d7a-b555-c6b15871ddb9
DTSTAMP:20210622T223733Z
CREATED:20201123T163627Z
DESCRIPTION:Topic: Statistical physics of random CSPs\n\nSpeakers: Nike Sun
\n\nAffiliation: Massachusetts Institute of Technology\n\nI will describe
recent progress in determination of asymptotic\nbehavior in random constra
int satisfaction problems\, including the\nindependent set problem on rand
om graphs\, random regular NAE-SAT\, and\nrandom SAT. The results include
sharp phase transitions and some\nunderstanding of solution geometry\, par
ticularly in the setting of the\nrandom regular NAE-SAT problem. In this l
ecture I will survey the\nphysics heuristics\, and explain how they lead t
o combinatorial models\nfor the solution geometry\, which form a basis of
mathematical\napproaches to these problems.\n\nThis lecture is based in pa
rt on joint works with Zsolt Bartha\, Jian\nDing\, Allan Sly\, and Yumeng
Zhang.\n\n \n
DTSTART:20210419T190000Z
DTEND:20210419T200000Z
LAST-MODIFIED:20210419T121207Z
LOCATION:Remote Access via Zoom videoconferencing (link below)
SUMMARY:Marston Morse Lectures
URL:https://www.ias.edu/math/events/marston-morse-lectures
END:VEVENT
BEGIN:VEVENT
UID:ffd07bab-0e86-46ac-b495-11f8cd0978d6
DTSTAMP:20210622T223733Z
CREATED:20210323T165102Z
DESCRIPTION:Topic: From hyperbolic billiards to statistical physics\n\nSpea
kers: Peter Nandori\n\nAffiliation: Yeshiva University\; Member\, School o
f Mathematics\n\nConsider a point particle flying freely on the torus and
elastically\nbouncing back from the boundary of fixed smooth convex obstac
les. This\nis the celebrated Sinai billiard\, a rare example of a determin
istic\ndynamical system where rigorous results relevant for statistical\np
hysics are available. In this talk\, we will briefly review the\nclassical
theory (ergodicity\, mixing\, central limit theorem by Sinai\,\nBunimovic
h\, Chernov\, etc.). Then we will discuss some more recent\nresults\, such
as the mixing local limit theorem and nonequilibrium\ndensity profiles in
large domains (based on joint work with D.\nDolgopyat and T. Teolis). Fin
ally\, we will mention some attempts at\nstudying rarely interacting parti
cles.\n
DTSTART:20210419T203000Z
DTEND:20210419T213000Z
LAST-MODIFIED:20210419T121455Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-145
END:VEVENT
BEGIN:VEVENT
UID:65c2fdc5-0bf2-4ecf-9172-167594ac78a1
DTSTAMP:20210622T223734Z
CREATED:20210311T133758Z
DESCRIPTION:Topic: On Chen’s recent breakthrough on the Kannan-Lovasz-Simon
ovits conjecture and Bourgain's slicing problem\n\nSpeakers: Ronen Eldan\n
\nAffiliation: Weizmann Institute of Science\; Visitor\, School of Mathema
tics\n\nIn the mid 80's\, Bourgain asked the following question: Is there
a\nuniversal constant $c>0$ such that every compact convex set $K$ in\n$R^
n$\, of unit volume\, must contain a slice (namely\, a set of the form\n$K
\cap H$ for some affine hyperplane $H$) whose surface area is at\nleast $
c$? \n\nDue to its numerous implications and simple-to-state formulation\
, this\nquestion has become one of the central conjectures of convex geome
try.\nTen years later\, Kannan-Lovasz and Simonovits proposed a related\nq
uestion\, considering the following isoperimetric problem on\nhigh-dimensi
onal convex bodies: Given a convex body $K$\, consider the\noptimal way to
partition it into two pieces of equal volume so as to\nminimize their int
erface. Is it true that up to a universal constant\,\nthe minimal partitio
n is attained via a hyperplane cut? This question\nhas a direct implicatio
n on the complexity of many computational\nproblems on convex sets and\, m
oreover\, it was shown to imply\nBourgain's slicing conjecture. \n\nVery r
ecently\, Yuansi Chen obtained a striking breakthrough\, nearly\nsolving t
hese two problems. In these two talks we aim to give an\noverview on the s
ubject and\, hopefully\, a self contained proof of\nChen's results. On the
way towards the result\, we will become familiar\nwith the concept of 'lo
calization' (a very useful tool to prove\nconcentration inequalities) and
its extension\, stochastic\nlocalization\, the main technique used in the
proof.\n\n This work is also surveyed in the recent quanta article:\nhttps
://www.quantamagazine.org/statistics-postdoc-tames-decades-old-geometry-pr
oblem-20210301/\n
DTSTART:20210420T143000Z
DTEND:20210420T163000Z
LAST-MODIFIED:20210505T223950Z
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-477
END:VEVENT
BEGIN:VEVENT
UID:c8f0bbc9-32f2-4ea1-9b15-8d2226b6490a
DTSTAMP:20210622T223734Z
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:599e89ba-0f13-482c-ba15-e3cfb269d915
DTSTAMP:20210622T223734Z
CREATED:20210409T173256Z
DESCRIPTION:Topic: Perverse sheaves on Grassmannians via microlocal geometr
y\n\nSpeakers: Tom Braden\n\nAffiliation: University of Massachusetts\, Am
herst\; Member\, School of Mathematics\n\nI will present a finite-dimensio
nal quiver algebra whose\nrepresentations are equivalent to the category o
f\nSchubert-constructible perverse sheaves on the Grassmannian $Gr(k\,n)$.
\nThe functor inducing the equivalence is constructed by analyzing the\nlo
cal geometry of the conormal variety $\Lambda$ to the\nstratification\, an
d gluing the associated categories of microlocal\nperverse sheaves. I will
emphasize the special features of $\Lambda$\nwhich make the Grassmannian
much more tractable than other flag\nvarieties. If time permits\, I will t
alk about a graded version of the\nquiver algebra due to Khovanov and Stro
ppel.\n
DTSTART:20210420T200000Z
DTEND:20210420T220000Z
LAST-MODIFIED:20210419T134745Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-22
END:VEVENT
BEGIN:VEVENT
UID:9daa4b6f-2c2f-4e30-9102-a21ba7ccc788
DTSTAMP:20210622T223734Z
CREATED:20210115T153418Z
DESCRIPTION:Topic: Cold galactic outflows in the Milky Way-Magellanic syste
m\n\nSpeakers: Enrico Di Teodoro\n\nAffiliation: Johns Hopkins University
\n\nOur Galaxy\, the Milky Way\, and its satellites\, the Magellanic Cloud
s\,\nare unique laboratories to study galactic winds in action. In this\nt
alk\, I will review the results of our recent HI and CO surveys of the\nGa
lactic Centre and of the Small Magellanic Cloud aimed to find traces\nof t
he cold gas component in local outflows. Our surveys revealed the\nexisten
ce of conspicuous populations of anomalous high-velocity clouds\nextending
up to distances of about 2 kpc from the Galactic Plane and\nfrom the Smal
l Magellanic Cloud. I will describe the morphological and\nkinematical pro
perties of neutral and molecular gas in these winds\,\nresolved on a ~1 pc
scale\, and discuss their possible origin.\n
DTSTART:20210421T150000Z
DTEND:20210421T160000Z
LAST-MODIFIED:20210421T120222Z
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-5
END:VEVENT
BEGIN:VEVENT
UID:aa562490-ddea-49d7-a7eb-c3b51b4a6ca3
DTSTAMP:20210622T223734Z
CREATED:20210416T213024Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210421T190000Z
DTEND:20210421T210000Z
LAST-MODIFIED:20210416T213110Z
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-27
END:VEVENT
BEGIN:VEVENT
UID:0b8af321-8e95-44fc-98cb-296a5600bad5
DTSTAMP:20210622T223734Z
CREATED:20210302T194233Z
DESCRIPTION:Topic: Probabilistic analysis of random CSPs\n\nSpeakers: Nike
Sun\n\nAffiliation: Massachusetts Institute of Technology\n\n(This lecture
is related to the preceding lecture\, but I will try to\nmake it self-con
tained as much as possible.) In this lecture I will\nelaborate on some of
the existing mathematical approaches to the study\nof random CSPs\, partic
ularly involving the (first and second) moment\nmethod. We will see that i
mplementing the moment method often reduces\nto the solution of difficult
(non-convex) optimization problems. I\nwill discuss one basic strategy tha
t has been used to solve some of\nthese problems\, which is to (1) use a p
riori estimates to localize the\noptimization to a small neighborhood\, an
d (2) use the contractivity of\ntree recursions and a 'local update' proce
dure to solve the\noptimization within the small neighborhood.\n\nThis lec
ture is based in part on joint works with Zsolt Bartha\, Jian\nDing\, Alla
n Sly\, and Yumeng Zhang.\n \n
DTSTART:20210421T190000Z
DTEND:20210421T200000Z
LAST-MODIFIED:20210421T121039Z
LOCATION:Remote Access via Zoom videoconferencing (link below)
SUMMARY:Marston Morse Lectures
URL:https://www.ias.edu/math/events/marston-morse-lectures-98
END:VEVENT
BEGIN:VEVENT
UID:99eade7e-3c50-47ac-ae71-be2ac00ac35f
DTSTAMP:20210622T223734Z
CREATED:20210329T182455Z
DESCRIPTION:Topic: Floer's Jungle: 35 years of Floer Theory\n\nSpeakers: Si
obhan Roberts\, Helmut Hofer\n\nAffiliation: Independent Scholar\; Hermann
Weyl Professor\, School of Mathematics\n\nAn exceptionally gifted mathema
tician and an extremely complex person\,\nFloer exhibited\, as one friend
put it\, a “radical individuality.”\nHe viewed the world around him with a
singularly critical way of\nthinking and a quintessential disregard for c
onvention. Indeed\, his\nrevolutionary mathematical ideas\, contradicting
conventional wisdom\,\ncould only be inspired by such impetus\, and can on
ly be understood in\nthis context.\n
DTSTART:20210421T213000Z
DTEND:20210421T230000Z
LAST-MODIFIED:20210420T001239Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-210
END:VEVENT
BEGIN:VEVENT
UID:783e41d6-5312-4e46-87b1-502bd85855f9
DTSTAMP:20210622T223734Z
CREATED:20210415T182559Z
DESCRIPTION:
DTSTART:20210422T140000Z
DTEND:20210422T160000Z
LAST-MODIFIED:20210415T182608Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-26
END:VEVENT
BEGIN:VEVENT
UID:1af188d1-bf4f-43bd-9043-2e6d406a2b88
DTSTAMP:20210622T223734Z
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:83ea887f-5187-4fb1-9ee5-45f4364e8e2a
DTSTAMP:20210622T223734Z
CREATED:20210409T173133Z
DESCRIPTION:Topic: Kazhdan-Lusztig category\n\nSpeakers: Jin-Cheng Guu\n\nA
ffiliation: Stony Brook University\n\nThe talk introduces the Kazhdan-Lusz
tig categories of representations\nof affine Lie algebras\n
DTSTART:20210422T200000Z
DTEND:20210422T220000Z
LAST-MODIFIED:20210422T121443Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-11
END:VEVENT
BEGIN:VEVENT
UID:5e49e00e-6d55-4bb2-958e-18243950ac38
DTSTAMP:20210622T223734Z
CREATED:20210405T182637Z
DESCRIPTION:Topic: Kolyvagin's conjecture and higher congruences of modular
forms\n\nSpeakers: Naomi Sweeting\n\nAffiliation: Harvard University\n\nG
iven an elliptic curve $E$\, Kolyvagin used CM points on modular\ncurves t
o construct a system of classes valued in the Galois\ncohomology of the to
rsion points of $E$. Under the conjecture that not\nall of these classes v
anish\, he gave a description for the Selmer\ngroup of $E$. This talk will
report on recent work proving new cases\nof Kolyvagin's conjecture. The p
roof builds on work of Wei Zhang\, who\nused congruences between modular f
orms to prove Kolyvagin's conjecture\nunder some technical hypotheses. We
remove many of these hypotheses by\nconsidering congruences modulo higher
powers of $p$. The talk will\nexplain the difficulties associated with hig
her congruences of modular\nforms and how they can be overcome.\n
DTSTART:20210422T203000Z
DTEND:20210422T213000Z
LAST-MODIFIED:20210422T121633Z
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-448
END:VEVENT
BEGIN:VEVENT
UID:2579487a-1700-49ac-8534-bad4be0a35fd
DTSTAMP:20210622T223734Z
CREATED:20210405T150359Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210423T131500Z
DTEND:20210423T144500Z
LAST-MODIFIED:20210405T170417Z
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-68
END:VEVENT
BEGIN:VEVENT
UID:f565f9e4-ce30-4018-a0d3-4b3a2977ceac
DTSTAMP:20210622T223734Z
CREATED:20210430T080710Z
DESCRIPTION:Topic: Description:Topic 1: The projected impact of commercial
satellite constellations on ground-based astronomy Topic 2: The DMRadio Ex
periment at Princeton\n\nSpeakers: Speaker 1: Sarah Marie Bruno Speaker 2:
Roman Kolevatov\n\nAffiliation: Princeton University\n\nAbstract 1: The o
ngoing commercialization of satellite technology is\nleading to the ubiqui
ty of privately owned and operated satellite\nspacecraft in low-Earth orbi
ts. These satellites can be used for data\ncollection for a variety of com
mercially viable applications including\nlow-cost global internet access\,
time-share for academic researchers\nin fields such as astronomy and clim
ate change\, and access for\ngovernment agencies for various applications.
As of May 2020\, there\nwere an estimated 2200 satellites in low-Earth or
bits\, a number that\nhas grown within the past year. Several commercial c
ompanies plan to\nlaunch mega-constellations of small satellites for high-
speed\nbroadband satellite internet\, including SpaceX's _Starlink_ projec
t\,\nwhich will launch 42\,000 satellites. While there are many projected
\nsocietal benefits of the upcoming commercial satellite initiatives\,\nin
creasing satellite prevalence will undoubtedly impact ground-based\nastron
omy. Some satellites may transmit in low-frequency bands that\ninterfere w
ith radio astronomy. Additionally\, satellites in certain\norbits may refl
ect sunlight\, impeding the ability of ground-based\ntelescopes to observe
in the visible spectrum. The future of\nground-based projects is uncertai
n. I will describe the expected\nimpact of commercial satellites on ground
-based astronomy and\nhighlight several proposals for mitigating this effe
ct.\n\nAbstract 2: Axions are hypothetical particles initially introduced
to\nsolve the strong CP problem of QCD. Simultaneously\, axions are a\ncom
pelling dark matter candidate\, which has resulted in the proposal\nof det
ectors to search for them. The Dark Matter Radio experiment is a\nQCD axio
n\, and axion-like particles search in a substantive range of\nmasses from
peV to micro-eV. We will discuss one of the efforts of the\nDMRadio colla
boration at Princeton\, which involves designing and\ntesting a high-Q (>1
0^6) lumped-element resonator operating at\ncryogenic temperatures to enha
nce the axion signal.\n
DTSTART:20210423T160000Z
DTEND:20210423T170000Z
LAST-MODIFIED:20210430T080851Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-group-semin
ar-2
END:VEVENT
BEGIN:VEVENT
UID:1becfd7d-2e69-4471-8aaf-ea580ca4f710
DTSTAMP:20210622T223734Z
CREATED:20210318T160606Z
DESCRIPTION:Topic: Simtho: The Syriac Thesaurus\n\n_Simtho: The Syriac Thes
aurus_ [/media/194546]. Launch of a Syriac\ntextual corpus portal hosted b
y SABINE SCHMIDTKE and GEORGE A. KIRAZ\nfrom the Institute for Advanced St
udy.\n\nSimtho [simtho.bethmardutho.org] is a Syriac corpus search engine
with\na textual database spanning almost two millennia. A Beta version wa
s\nrevealed at the 2018 AAR/SBL meeting in San Diego with over 6 million\n
words. The upcoming Beta II zlaunch will uncover a textual database\nof o
ver 13 million words with a new responsive and more attractive\nuser inter
face.\n\nTeam member will discuss various digital humanities and computati
onal\nlinguistics techniques including corpus building\, the power or regu
lar\nexpressions\, building OCR and HTR models\, metadata\, and part-of-sp
eech\ntagging. While these techniques are applied to Syriac\, they can be
\neasily transferable to other (especially Semitic) languages.\n\nREGISTER
IN ADVANCE HERE\n[https://theias.zoom.us/meeting/register/tZIlcOirqjsrE9A
NLzD6U_112X417OUYuvbU]. After\nregistering\, you will receive a confirmati
on email containing\ninformation about joining the event. For additional i
nformation email\nds@ias.edu.\n\n \n
DTSTART:20210423T160000Z
DTEND:20210423T160000Z
LAST-MODIFIED:20210318T161356Z
LOCATION:Online
SUMMARY:Near Eastern Studies and Digital Scholarship @IAS Joint Event
URL:https://www.ias.edu/hs/events/near-eastern-studies-and-digital-scholars
hip-ias-joint-event
END:VEVENT
BEGIN:VEVENT
UID:d85a0d42-46ca-4c90-9e4f-64eb485af812
DTSTAMP:20210622T223734Z
CREATED:20210205T161343Z
DESCRIPTION:Topic: The dynamics of pair and electron-ion relativistic colli
sionless shock waves\n\nSpeakers: Arno Vanthieghem\n\nAffiliation: Stanfor
d University\n\nAmong other powerful relativistic astrophysical objects\,
gamma-ray\nbursts and blazars provide ideal environments to understand the
\nacceleration mechanisms of high-energy charged particles. The\nradiative
spectra observed in such objects are generally attributed to\nparticles e
nergized in relativistic collisionless shock waves. We\npresent the main a
spects of an analytical model that describe the\ndynamics of the precursor
of relativistic unmagnetized collisionless\nshock waves in electron-posit
ron plasmas. This model is then extended\nto electron-ion plasmas by accou
nting for the longitudinal\nelectrostatic field playing an important role
in the strong\nnon-adiabatic heating and slowdown of the electrons in the
shock front\nframe. This model is validated by large-scale ab initio\nPart
icle-In-Cell simulations of relativistic unmagnetized pair and\nelectron-i
on shocks with various mass ratios and Lorentz factors of\nthe shock wave.
We then introduce a hydrodynamical model allowing to\ntreat the dynamics
of a loaded plasma in the context of neutron shell\npropagating upstream o
f a decelerating ion blast wave. We show how the\nneutron shell affects th
e dynamics of the shock up to a critical\nregime presenting particle accel
eration.\n
DTSTART:20210423T163000Z
DTEND:20210423T180000Z
LAST-MODIFIED:20210422T153017Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-9
END:VEVENT
BEGIN:VEVENT
UID:c6e9f74f-7f6f-41fc-b856-9c8017479a38
DTSTAMP:20210622T223734Z
CREATED:20210302T194306Z
DESCRIPTION:Topic: On the Ising perceptron model\n\nSpeakers: Nike Sun\n\nA
ffiliation: Massachusetts Institute of Technology\n\n(This lecture will be
self-contained.) In high dimensions\, what does\nit look like when we tak
e the intersection of a set of random\nhalf-spaces with either the sphere
or the Hamming cube? This is one\nphrasing of the so-called perceptron pro
blem\, whose study originated\nwith a toy model of a very simple neural ne
twork. A non-rigorous\nsolution was given in the 1980s (Gardner\, Derrida\
, Krauth\, Mézard)\nusing methods of statistical physics. Shcherbina and T
irozzi gave a\nrigorous solution to the positive spherical perceptron\, ma
king crucial\nuse of the convexity of this problem. The other cases of the
model are\nnon-convex and remain open problems. I will survey the physics
\nsolution and describe some results for the perceptron on the Hamming\ncu
be.\n\nThis lecture is based on joint work with Jian Ding.\n
DTSTART:20210423T190000Z
DTEND:20210423T200000Z
LAST-MODIFIED:20210423T124103Z
LOCATION:Remote Access via Zoom videoconferencing (link below)
SUMMARY:Marston Morse Lectures
URL:https://www.ias.edu/math/events/marston-morse-lectures-99
END:VEVENT
BEGIN:VEVENT
UID:4e384330-a03b-4c0e-98af-5ebc9cc985d5
DTSTAMP:20210622T223734Z
CREATED:20210311T134037Z
DESCRIPTION:Topic: On Chen’s recent breakthrough on the Kannan-Lovasz-Simon
ovits conjecture and Bourgain's slicing problem - Part II\n\nSpeakers: Ron
en Eldan\n\nAffiliation: Weizmann Institute of Science\; Visitor\, School
of Mathematics\n\nThis is the second talk in a 3-lecture series whose goal
is to give\nbackground as well as a self contained proof of Chen's recent
\nbreakthrough on the KLS conjecture and slicing problem (a video of the\n
first lecture can be found here:\n\nhttps://www.ias.edu/video/chens-recent
-breakthrough-kannan-lovasz-simonovits-conjecture-and-bourgains-slicing-pr
oblem).\n\nAfter becoming familiar with the concept of localization in the
first\ntalk\, in this talk we will focus on _stochastic localization_\, t
he\ncentral ingredient used in Chen's result. Stochastic localization is a
\nprocess driven by a Brownian motion which gives rise to a\ndecomposition
of a given measure to 'well-behaved' measures. We will\ndescribe the cons
truction of the process\, establish some of\nits basic properties\, and th
en show how it can be used to prove\nconcentration and isoperimetric inequ
alities. In the third and last\ntalk\, we'll finally be in a position to u
se this construction to\nestablish Chen's result.\n\nA note on required ba
ckground: The technique that we discuss uses\nSTOCHASTIC CALCULUS and in p
articular ITO'S FORMULA. Since this\ntalk is aimed for the CS and discret
e math communities\, I WILL DO MY\nBEST TO EXPLAIN THE FORMULAS IN A WAY T
HAT REQUIRES NO PRIOR KNOWLEDGE\nIN STOCHASTIC CALCULUS. However\, a prett
y short read that may be very\nhelpful in following the formulas is found
in Section 1\nhere: http://www.wisdom.weizmann.ac.il/~ronene/GFANotes.pdf.
\n\n \n
DTSTART:20210426T143000Z
DTEND:20210426T163000Z
LAST-MODIFIED:20210505T223908Z
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-478
END:VEVENT
BEGIN:VEVENT
UID:247e56ab-e22d-4973-acf0-63cbc1f13f36
DTSTAMP:20210622T223734Z
CREATED:20210317T140445Z
DESCRIPTION:Topic: The bursty origin of the Milky Way thick disc\n\nSpeaker
s: Sijie (Anna) Yu\n\nAffiliation: University of California Irvine\n\nEach
week\, we hold a relatively informal seminar/discussion series\nwith an e
mphasis on extra-galactic and large-scale structure\nastrophysics.\n\nDuri
ng Galread a leader/visitor presents a recent paper to the\ndiscussion gro
up. The PDF of the paper is projected onto a large\nscreen\, and a guest e
xplains the paper\, section by section\, in greater\ndetail than may be ex
plained within the text of the article. To aid\nwith discussion\, only the
article PDF is presented -- no\npowerpoint-style slides. Galread discussi
ons are very friendly and\ninteractive.\n
DTSTART:20210426T150000Z
DTEND:20210426T160000Z
LAST-MODIFIED:20210317T140844Z
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-15
END:VEVENT
BEGIN:VEVENT
UID:600bb712-bc56-4d21-a974-54074684a589
DTSTAMP:20210622T223734Z
CREATED:20210114T152550Z
DESCRIPTION:Topic: The most extreme climates in the Universe\n\nSpeakers: D
avid Ehrenreich\n\nAffiliation: University of Geneva\n\nUltrahot gas giant
s are exoplanet so close to their hot stars that\nthey receive thousands o
f time the insolation of Earth. As such\, they\nare extreme laboratories t
o study atmospheric physics\, chemistry\, and\nclimates. They are also wel
l amenable to remote sensing by space-borne\nand ground-based observations
. Trying to learn more about the most\nextreme climates in the Universe\,
we could measure stellar dayside\ntemperatures\, nightside metallic rains\
, and atmospheric escape. We\nhave also been using these outstanding exopl
anets as trojan horses to\nbenchmark characterization techniques that coul
d eventually be applied\nto smaller\, milder planets. I will discuss some
of the results we\nobtained\, in particular exploiting two novel instrumen
ts using\nhigh-resolution spectroscopy (ESPRESSO) and high-precision photo
metry\n(CHEOPS).\n
DTSTART:20210426T160000Z
DTEND:20210426T170000Z
LAST-MODIFIED:20210423T100029Z
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:945abf93-3279-4038-8d76-99d8c172b999
DTSTAMP:20210622T223734Z
CREATED:20210114T150643Z
DESCRIPTION:Topic: Topics in inflationary cosmology: reheating\, gauge fiel
ds and gravitational waves\n\nSpeakers: Kaloian Lozanov\n\nAffiliation: Un
iversity of Illinois at Urbana-Champaign\n\nWe will review our current und
erstanding of reheating after inflation\,\nincluding various aspects of th
e linear and nonlinear dynamics of the\ninflaton field\, such as parametri
c resonance\, the generation of metric\nperturbations and the effects of t
he nonlinear evolution on the\npost-inflationary expansion history. We wil
l also review the recent\nprogress in the understanding of the non-perturb
ative dynamics of dark\nvector fields during reheating and whether they ca
n play the role of\ndark matter in the late universe. Finally\, we will di
scuss\nphenomenologically interesting models of gauge fields during inflat
ion\nwhich can give rise to detectable gravitational wave signatures.\n
DTSTART:20210426T163000Z
DTEND:20210426T180000Z
LAST-MODIFIED:20210421T120606Z
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:7f877de5-6001-403d-9a9e-87993a1ceaea
DTSTAMP:20210622T223734Z
CREATED:20210408T163819Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210426T180000Z
DTEND:20210426T190000Z
LAST-MODIFIED:20210422T181143Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-4
END:VEVENT
BEGIN:VEVENT
UID:6bf8c44c-4bd5-4299-85c2-de3a124040ab
DTSTAMP:20210622T223734Z
CREATED:20210323T170016Z
DESCRIPTION:Topic: Mean curvature flow in high co-dimension\n\nSpeakers: Wi
lliam Minicozzi\n\nAffiliation: Massachusetts Institute of Technology\n\nM
ean curvature flow (MCF) is a geometric heat equation where a\nsubmanifold
evolves to minimize its area. A central problem is to\nunderstand the sin
gularities that form and what these imply for the\nflow. I will talk about
joint work with Toby Colding on higher\nco-dimension MCF\, where the flow
becomes a complicated system of\nequations and much less is known.\n
DTSTART:20210426T203000Z
DTEND:20210426T213000Z
LAST-MODIFIED:20210426T141956Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-146
END:VEVENT
BEGIN:VEVENT
UID:b5b8fe9a-53d9-4508-bc2c-d6d434772803
DTSTAMP:20210622T223734Z
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:4743c248-4f36-44e7-80c0-987525881e46
DTSTAMP:20210622T223734Z
CREATED:20210409T173933Z
DESCRIPTION:Topic: Invariance and monodromy of microlocal sheaves\n\nSpeake
rs: David Nadler\n\nAffiliation: University of California\, Berkeley\n\nI'
ll review results and examples of the invariance and monodromy of\nmicrolo
cal sheaves under mutations of their support. Then I'll suggest\nsome prob
lems in geometric representation theory where we would like\nto apply such
techniques.\n
DTSTART:20210427T200000Z
DTEND:20210427T220000Z
LAST-MODIFIED:20210422T115932Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-23
END:VEVENT
BEGIN:VEVENT
UID:466f28ee-f3cb-415c-895c-87e323e235ca
DTSTAMP:20210622T223734Z
CREATED:20210317T151902Z
DESCRIPTION:Topic: Everything Flows: The dynamics of the molecular interste
llar medium\n\nSpeakers: Jonathan Henshaw\n\nAffiliation: Max Planck Insti
tute for Astronomy\, Heidelberg\n\nThe density structure of the interstell
ar medium determines both where\nstars form and where they release the ene
rgy\, momentum and heavy\nelements\, that drive galaxy evolution. Although
dense star-forming gas\nprobably emerges from a variety of mechanisms\, e
stablishing the\nprecise origin is observationally challenging because it
requires\nquantifying gas motion over many orders of magnitude in spatial
scale.\nIn this talk\, I will present our work in which we have measured t
he\nmotion of molecular gas in the Milky Way and in nearby galaxy NGC\n432
1\, thereby assembling observations that span an unprecedented\nspatial dy
namic range. I will demonstrate how our analysis allows us\nto visualise t
he molecular interstellar medium in a new way\, leading\nto the discovery
of wave-like velocity fluctuations across all spatial\nscales and galactic
environments. I will show how combining the\nanalysis of density and velo
city fluctuations can help to establish\nthe physical mechanisms driving t
he motion of star-forming gas\, and\ndiscuss how nested\, interdependent g
as flows control the formation ISM\nstructure and its evolution towards st
ar formation.\n
DTSTART:20210428T150000Z
DTEND:20210428T160000Z
LAST-MODIFIED:20210427T114658Z
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:bc525c80-901e-4e42-8c18-70c38f864529
DTSTAMP:20210622T223734Z
CREATED:20210416T213128Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210428T190000Z
DTEND:20210428T210000Z
LAST-MODIFIED:20210416T213152Z
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-28
END:VEVENT
BEGIN:VEVENT
UID:3bcd3515-ef18-473c-8be8-26d481dbefab
DTSTAMP:20210622T223734Z
CREATED:20210329T182511Z
DESCRIPTION:Topic: Math & Computation: some principles\, anecdotes and ques
tions\n\nSpeakers: Avi Wigderson\n\nAffiliation: Herbert H. Maass Professo
r\, School of Mathematics\n\nI planned to give a different talk\, about re
cent work I am excited\nabout. But then Helmut asked me to instead talk of
'Dreams of\nmathematics and computer science'. And his wish is my command
...\n\nI'll describe\, mainly through works of some great mathematicians\,
some\naspects of how studying computational issues in mathematics is natu
ral\nand beneficial\; a long-lasting match made in heaven.\n
DTSTART:20210428T213000Z
DTEND:20210428T230000Z
LAST-MODIFIED:20210427T134545Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-211
END:VEVENT
BEGIN:VEVENT
UID:a00257f1-9581-4caf-a65c-4bad016301b1
DTSTAMP:20210622T223734Z
CREATED:20210415T182615Z
DESCRIPTION:
DTSTART:20210429T140000Z
DTEND:20210429T160000Z
LAST-MODIFIED:20210415T182623Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-27
END:VEVENT
BEGIN:VEVENT
UID:0392900c-0d04-48de-80c9-b952c704ed8a
DTSTAMP:20210622T223734Z
CREATED:20210113T164711Z
DESCRIPTION:Topic: R-process transients\n\nSpeakers: Jennifer Barnes\n\nAff
iliation: Columbia University\n\nRapid neutron capture (r-process) nucleos
ynthesis is responsible for\nthe production of roughly half of the element
s in the Periodic Table\nmore massive than Iron. The unusual conditions ne
eded for a successful\nr-process\, in particular the requisite high flux o
f (unstable) free\nneutrons\, have made the astrophysical site(s) in which
the r-process\noccurs an enduring mystery. Observations of the first dete
cted neutron\nstar merger\, GW170817\, in both electromagnetic and gravita
tional\nradiation yielded evidence that merging neutron stars\, long favor
ed\ntheoretically as r-process sources\, did indeed undergo heavy element
\nnucleosynthesis. However\, these same observations suggested that\nneutr
on star mergers may not be unique in their ability to produce\nr-process e
lements. I will review recent progress on understanding\nr-process sources
\, including clues from numerical relativity\nsimulations and observations
of galactic chemical enrichment. I will\nthen discuss how models and obse
rvations radiation from explosive\nastrophysical transients may reveal the
origin of the heaviest\nelements in the Universe.\n
DTSTART:20210429T150000Z
DTEND:20210429T160000Z
LAST-MODIFIED:20210423T185646Z
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:ecfc6ebe-b319-4ec6-9e42-e3264ca58d74
DTSTAMP:20210622T223734Z
CREATED:20210405T182651Z
DESCRIPTION:Topic: On the canonical\, fpqc and finite topologies: classical
questions\, new answers (and conversely)\n\nSpeakers: Yves André\n\nAffil
iation: Institut de Mathématiques de Jussieu-Paris Rive Gauche\n\nUp to a
finite covering\, a sequence of nested subvarieties of an\naffine algebra
ic variety just looks like a flag of vector spaces\n(Noether)\; understand
ing this « up to » is a primary motivation for\na fine study of finite cov
erings.\n\nThe aim of this talk is to give a bird-eye view of some fundame
ntal\nquestions about them\, which took root in Algebraic Geometry (descen
t\nproblems etc.)\, then motivated major trends in Commutative Algebra\n(F
-singularities etc.)\, and recently found complete solutions using\n$p$-ad
ic methods (perfectoids). Rather than going into detail of the\nlatter\, t
he emphasis will be on synthesizing\, from the geometric\nviewpoint\, a ra
ther scattered theme.\n\nThis is based on joint work with Luisa Fiorot\n(h
ttps://doi.org/10.2422/2036-2145.201912_006)\n
DTSTART:20210429T200000Z
DTEND:20210429T210000Z
LAST-MODIFIED:20210423T164548Z
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-449
END:VEVENT
BEGIN:VEVENT
UID:18c51469-2271-4e3b-80db-81b767c95366
DTSTAMP:20210622T223734Z
CREATED:20210409T174743Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210429T200000Z
DTEND:20210429T220000Z
LAST-MODIFIED:20210423T122222Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-12
END:VEVENT
BEGIN:VEVENT
UID:0044269a-377a-4e24-bf97-06412d0a1715
DTSTAMP:20210622T223734Z
CREATED:20210405T150414Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210430T131500Z
DTEND:20210430T144500Z
LAST-MODIFIED:20210405T170324Z
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-69
END:VEVENT
BEGIN:VEVENT
UID:c56c12f4-a3db-40be-b2fc-02bda3788f0c
DTSTAMP:20210622T223734Z
CREATED:20210205T161408Z
DESCRIPTION:Topic: A systematic exploration of magnetized winds solutions i
n protoplanetary discs\n\nSpeakers: Geoffroy Lesur\n\nAffiliation: CNRS/Gr
enoble\n\nThe recent developments in our understanding of the chemical\nco
mposition\, the ionisation equilibrium and the dynamics of\nprotoplanetary
discs has led to the conclusion that magnetised disc\nwind (MDW) are prob
ably playing an important role in shaping the long\nterm evolution of thes
e objects. Most of our understanding of these\nwinds comes from complex gl
obal direct numerical simulations which\ninclude detailed microphysics and
which explore only a very limited\nsubspace of parameters. Hence\, it is
very difficult to draw firm\nconclusions about the nature of MDWs\, their
property\, and the\nlong-term evolution of discs subject to MDWs. In this
talk\, I will\npresent a systematic exploration of MDW solutions\, using a
simplified\nself-similar approach\, which can then be used in secular mod
els to\npredict the evolution of a disc\, in a way similar to the 'alpha d
isc'\nmodel. I will also discuss the solutions topology (top/down symmetry
\,\nmidplane/surface accretion layers\, laminar stress\, etc...) which hav
e\noften been mis-interpreted in the literature. \n
DTSTART:20210430T160000Z
DTEND:20210430T173000Z
LAST-MODIFIED:20210427T113743Z
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:c4b8fe92-9e33-454b-860e-f0b9803c9f8a
DTSTAMP:20210622T223734Z
CREATED:20210430T080910Z
DESCRIPTION:Topic: Topic 1: Map-based Noise Simulations for ACT Data Topic
2: r Error Budget for SPIDER's First Flight\n\nSpeakers: Speaker 1: Zachar
y Atkins Speaker 2: Suren Gourapura\n\nAffiliation: Princeton University\n
\nAbstract 1: The next analysis of ACT data will use\nprecision-cosmology-
capable maps of the microwave sky based on data\ntaken by the Advanced ACT
detector arrays since 2017. The maps will\ncover the full Advanced ACT fo
otprint (~44% f_sky\, see Aiola et al.\n2020 and Mallaby-Kay et al. 2021)\
, and therefore will contain\nspatially inhomogeneous\, anisotropic noise.
I will discuss ongoing\nwork aimed at adapting a 'tiled constant correlat
ion' noise model\,\noriginally presented in Naess et al. 2020\, to produce
fast\, map-based\nnoise simulations for use in validation and analysis pi
pelines for\nthese new data. This includes work to minimize computation ti
me and\ndisk space\, as well as tools to provide rapid feedback on simulat
ion\nperformance. Finally\, I will summarize the current simulation status
\,\nand outline some issues which will require more development work.\n\nA
bstract 2: SPIDER is a balloon-borne telescope designed to map the\nB-mode
polarization of the cosmic microwave background. SPIDER's 2015\nflight ma
pped 4.8% of the sky at 95 and 150 GHz\, with B-mode results\npublished re
cently on arXiv (2103.13334). I will discuss our error on\nthe tensor-to-s
calar ratio (_r_)\; what goes into it and what can be\nimproved with anoth
er flight.\n
DTSTART:20210430T160000Z
DTEND:20210430T170000Z
LAST-MODIFIED:20210430T081140Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-group-semin
ar-3
END:VEVENT
BEGIN:VEVENT
UID:38e8ee0e-7c61-47c3-be83-84600f0d91e3
DTSTAMP:20210622T223734Z
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:20210430T121910Z
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:bb37245c-2b43-479e-9863-c11df44730a9
DTSTAMP:20210622T223734Z
CREATED:20210115T163200Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210430T190000Z
DTEND:20210430T200000Z
LAST-MODIFIED:20210423T190119Z
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:1f20bbe7-9aee-4760-af18-74b6030891c9
DTSTAMP:20210622T223734Z
CREATED:20210317T141038Z
DESCRIPTION:Topic: A New Census of the 0.2 < z < 3.0 Universe. I. The Stell
ar Mass Function\n\nSpeakers: Joel Leja\n\nAffiliation: Penn State Univers
ity\n\nEach week\, we hold a relatively informal seminar/discussion series
\nwith an emphasis on extra-galactic and large-scale structure\nastrophysi
cs.\n\nDuring Galread a leader/visitor presents a recent paper to the\ndis
cussion group. The PDF of the paper is projected onto a large\nscreen\, an
d a guest explains the paper\, section by section\, in greater\ndetail tha
n may be explained within the text of the article. To aid\nwith discussion
\, only the article PDF is presented -- no\npowerpoint-style slides. Galre
ad discussions are very friendly and\ninteractive.\n
DTSTART:20210503T150000Z
DTEND:20210503T160000Z
LAST-MODIFIED:20210317T141220Z
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-16
END:VEVENT
BEGIN:VEVENT
UID:f64608b4-fc9e-43ae-8260-1f3f83634c0b
DTSTAMP:20210622T223734Z
CREATED:20210114T152615Z
DESCRIPTION:Topic: The Orbital Stability of Compact Three-Planet Systems\n
\nSpeakers: Jack Lissauer\n\nAffiliation: NASA Ames Research Center\n\nDr.
Jack Lissauer will discuss his two latest papers\,\n\nOrbital stability o
f compact three-planet systems: I: Dependence of\nsystem lifetimes on ini
tial orbital separations and longitudes\n[https://arxiv.org/pdf/2104.13657
.pdf]\n\nOrbital stability of compact three-planet systems\, II:\nPost-ins
tability impact behaviour\n[https://arxiv.org/pdf/2104.13658.pdf]\n
DTSTART:20210503T160000Z
DTEND:20210503T170000Z
LAST-MODIFIED:20210430T143430Z
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:f44c9d25-931d-4238-a5b1-43219007989f
DTSTAMP:20210622T223734Z
CREATED:20210114T150715Z
DESCRIPTION:Topic: Topic 1: Getting ready for Euclid\, Rubin and Roman. Top
ic 2: TBA\n\nSpeakers: Speaker 1: Adam Amara Speaker 2: Kazuyuki Akitsu\n
\nAffiliation: Institute of Cosmology & Gravitation\, Portsmouth\; The Ins
titute for Advanced Study\n\nAbstract 1: Observational cosmology is going
through a golden age. In\nparticular\, we are in the midst of an influx of
data from ongoing\nexperiments\, such as the Dark Energy Survey (DES). In
the coming\nyears\, the volume and quality of data will rapidly increase
as Stage\nIV surveys\, Euclid\, Rubin and Roman come online. Processing th
is data\nwill require new algorithms and methods to maximize our science r
each\nand to control for systematic errors. In this talk\, I will present
a\nmethod based on forward modeling that relies heavily on simulations\nof
the data. Given the complexities of the late-time Universe\, these\nforw
ard models need to capture the important properties of galaxy\npopulations
and key features imprinted on the data from the\nexperiments themselves.
By bringing together all these elements with\nadvanced statistical methods
and new machine learning algorithms\, we\ncan build a process for extract
ing maximal information from the new\ndata\, in a way that robustly accoun
ts for error effects. \n
DTSTART:20210503T163000Z
DTEND:20210503T180000Z
LAST-MODIFIED:20210430T083843Z
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:9970067e-7aba-4f66-9432-ad8a0ba609cb
DTSTAMP:20210622T223734Z
CREATED:20210422T180315Z
DESCRIPTION:Topic: Addressing the Growing Distrust in Algorithms with Mathe
matics\n\nSpeakers: Shafi Goldwasser\n\nAffiliation: University of Califor
nia\, Berkeley\; Visiting Professor\, School of Mathematics\n\n
DTSTART:20210503T180000Z
DTEND:20210503T190000Z
LAST-MODIFIED:20210526T133806Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Members’ Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-5
END:VEVENT
BEGIN:VEVENT
UID:f3ca71a3-1787-409d-b598-8aee9bfdfc78
DTSTAMP:20210622T223734Z
CREATED:20210323T170031Z
DESCRIPTION:Topic: Korevaar-Schoen energy revisited\n\nSpeakers: Nicola Gig
li\n\nAffiliation: International School for Advanced Studies (SISSA)\n\nKo
revaar and Schoen introduced\, in a seminal paper in 1993\, the notion\nof
`Dirichlet energy’ for a map from a smooth Riemannian manifold to\na metr
ic space. They used such concept to extend to metric-valued maps\nthe regu
larity theory by Eells-Sampson about Lipschitz regularity of\nharmonic fun
ctions\, which\, in the smooth setting\, is based on a lower\nbound on the
Ricci curvature+upper bound on the dimension for the\nsource space and ne
gative sectional curvature+simple connectedness for\nthe target one. Both
these assumptions have a natural synthetic\ncounterpart: the $RCD(K\,N)$ c
ondition on one side and the $CAT(0)$ (or\nHadamard) condition on the othe
r. It is therefore natural to try to\nextend Korevaar-Schoen's theory - an
d ultimately Eells-Sampson’s one\n- to this setting. However\, already the
very definition of energy in\nthe sense of Korevaar-Schoen does not gener
alize well to non-smooth\nsource spaces: aim of this talk is to discuss th
is issue and a way to\ncircumvent it.\n\nFrom a joint work with A. Tyulene
v.\n
DTSTART:20210503T203000Z
DTEND:20210503T213000Z
LAST-MODIFIED:20210503T152316Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-147
END:VEVENT
BEGIN:VEVENT
UID:416b567f-737f-46ad-8437-d75efb534466
DTSTAMP:20210622T223734Z
CREATED:20210421T124958Z
DESCRIPTION:Topic: On Chen’s recent breakthrough on the Kannan-Lovasz-Simon
ovits conjecture and Bourgain's slicing problem - Part III\n\nSpeakers: Ro
nen Eldan\n\nAffiliation: Weizmann Institute of Science\; Visitor\, School
of Mathematics\n\nThis is the final talk in a 3-part series whose goal is
to give\nbackground as well as a self contained proof of Chen's recent\nb
reakthrough on the KLS conjecture and slicing problem. After becoming\nfam
iliar with the construction of stochastic localization and some of\nits ba
sic properties\, in this talk we'll complete the proof of Chen's\nresult.
If time allows\, we will also discuss some extensions as well\nas the redu
ction between the KLS conjecture and the slicing problem.\n\nVideo of firs
t\ntalk: https://www.ias.edu/video/chens-recent-breakthrough-kannan-lovasz
-simonovits-conjecture-and-bourgains-slicing-problem\n\nVideo of second ta
lk: \nhttps://www.ias.edu/video/chens-recent-breakthrough-kannan-lovasz-si
monovits-conjecture-and-bourgains-slicing-problem-0\n
DTSTART:20210504T143000Z
DTEND:20210504T163000Z
LAST-MODIFIED:20210505T223822Z
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-479
END:VEVENT
BEGIN:VEVENT
UID:aedfe823-9ab6-4ed2-b470-78322ea0d440
DTSTAMP:20210622T223734Z
CREATED:20210409T173947Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210504T200000Z
DTEND:20210504T220000Z
LAST-MODIFIED:20210429T132331Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-24
END:VEVENT
BEGIN:VEVENT
UID:fd2d0e4e-b7c2-41c4-a720-3ff6ecc6eaeb
DTSTAMP:20210622T223734Z
CREATED:20210416T213210Z
DESCRIPTION:Topic: Towards a modular '2 realizations' equivalence\n\nSpeake
rs: Simon Riche\n\nAffiliation: Université Clermont Auvergne\; Member\, Sc
hool of Mathematics\n\nI will report on a project joint with Roman Bezruka
vnikov (and partly\nwith Laura Rider) aiming at constructing a variant for
\npositive-characteristic coefficients of the equivalence constructed by\n
Bezrukavnikov in 'On two geometric realizations of an affine Hecke\nalgebr
a'. In a first paper we have obtained a description of the\n'regular quoti
ent' of the category of Iwahori-equivariant perverse\nsheaves on the affin
e flag variety in terms of representations of the\ncentralizer of a regula
r unipotent element in the dual group. In a\nsecond paper (in preparation)
we obtain a version of this equivalence\n'in families' over the adjoint q
uotient\, which allows to obtain the\ndesired equivalence 'over the regula
r locus'. In the talk I will\nexplain these constructions\, and how we pla
n to use them to construct\nthe full equivalence.\n
DTSTART:20210505T110000Z
DTEND:20210505T130000Z
LAST-MODIFIED:20210429T131528Z
LOCATION:Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/math/events/geometric-and-modular-representation-th
eory-seminar-29
END:VEVENT
BEGIN:VEVENT
UID:373b7264-6da7-4048-ab80-9e7171c7321e
DTSTAMP:20210622T223734Z
CREATED:20210329T182525Z
DESCRIPTION:Topic: Discrete Random Surfaces\n\nSpeakers: Amol Aggarwal\n\nA
ffiliation: Columbia University\n\nIn this talk we discuss two models of a
discrete random surface. The\nfirst is a Markov process\, like a simple r
andom walk\, under which the\nsurface is grown according to random updates
. The second chooses the\nsurface uniformly at random\, after pinning its
height along a\nboundary\, like a simple random bridge. We will explain ho
w these two\nmodels exhibit drastically different behaviors\, each of whic
h is\nuniversal in its own sense.\n
DTSTART:20210505T213000Z
DTEND:20210505T230000Z
LAST-MODIFIED:20210503T140100Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-212
END:VEVENT
BEGIN:VEVENT
UID:02df5702-eb1a-435a-8666-6d1867c20b11
DTSTAMP:20210622T223734Z
CREATED:20210415T182630Z
DESCRIPTION:
DTSTART:20210506T140000Z
DTEND:20210506T160000Z
LAST-MODIFIED:20210415T182638Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/math/events/moonshine-seminar-28
END:VEVENT
BEGIN:VEVENT
UID:79e33335-140d-41a4-ba12-fff22e21509a
DTSTAMP:20210622T223734Z
CREATED:20210113T164808Z
DESCRIPTION:Topic: Powerful Activity in Galaxies - the Wonder Years (aka Ge
neration Alpha)\n\nSpeakers: Stefi Baum\n\nAffiliation: University of Mani
toba\n\nPowerful extragalactic radio sources hosted in galaxies come in al
l\nshapes\, sizes\, powers\, and presumably ages. What might a young or\n
nascent powerful radio source look like? The class of\ncompact powerful e
xtragalactic radio sources are defined to have\nlinear sizes < 20 kpc and
be sub-galactic in scale. The smallest\nof these have uniquely peaked rad
io spectra. These sources might be\nvery young radio galaxies which will
evolve into the\ntraditional large radio galaxies with jets and lobes reac
hing to 100s\nof kpc to Mpc beyond the host galaxy. Or\, they might simply
be\ncompact because they are confined (and enhanced in radio power) by\ni
nteraction with particularly dense gas in their environments which\nmake i
t difficult for the jets to escape. Alternately\, the compact\nsources mi
ght be transient or intermittent sources\, which turn on and\noff with a q
uicker cadence. Then again\, different of these hypotheses\nmay apply to i
ndividual objects or at different stages in a given\nobject's evolution. T
he relative number in each population\, and the\naccompany lifetimes\, hav
e significant implications for understanding\nthe life cycles of activity
in galaxies. Proper motion studies over\nlong time baselines have helped
determine hotspot speeds for over\nthree dozen sources and establish that
some objects are indeed young.\nMulti-frequency observations have demonstr
ated that many compact\nsources are indeed embedded in a dense interstella
r medium and\nvigorously interacting with it. The detection of emission li
ne gas\naligned with the radio source\, and blue-shifted HI absorption and
\n[OIII] emission lines indicates that AGN feedback is present in these\no
bjects and is likely critical to the evolution of activity and the\nhost g
alaxy supporting the AGN feedback model.\n
DTSTART:20210506T150000Z
DTEND:20210506T160000Z
LAST-MODIFIED:20210507T083522Z
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:1bef08fb-00bc-4c16-aac1-0b81776e7521
DTSTAMP:20210622T223734Z
CREATED:20210409T174756Z
DESCRIPTION:Topic: Kazhdan-Lusztig category\n\nSpeakers: Jin-Cheng Guu\n\nA
ffiliation: Stony Brook University\n\nContinuation from last time.\n
DTSTART:20210506T200000Z
DTEND:20210506T220000Z
LAST-MODIFIED:20210506T132445Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-13
END:VEVENT
BEGIN:VEVENT
UID:3ada1ff3-172c-478a-a457-3f7455ee2c64
DTSTAMP:20210622T223734Z
CREATED:20210405T182706Z
DESCRIPTION:Topic: Groups with bounded generation: old and new\n\nSpeakers:
Andrei S. Rapinchuk\n\nA group is said to have bounded generation (BG) if
it is a finite\nproduct of cyclic subgroups. We will survey the known exa
mples of\ngroups with (BG) and their properties. We will then report on a
recent\nresult (joint with P. Corvaja\, J. Ren and U. Zannier) that\nnon-v
irtually abelian anisotropic linear groups (i. e. those\nconsisting entire
ly of semi-simple elements) are not boundedly\ngenerated. The proofs rely
on number-theoretic techniques.
DTSTART:20210506T203000Z
DTEND:20210506T213000Z
LAST-MODIFIED:20210506T132744Z
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-450
END:VEVENT
BEGIN:VEVENT
UID:7b1cbfd5-cedc-4c60-804d-f73c48ae2105
DTSTAMP:20210622T223734Z
CREATED:20210405T150428Z
DESCRIPTION:Topic: Unexpected fillings\, singularities\, and plane curve ar
rangements\n\nSpeakers: Laura Starkston\n\nAffiliation: University of Cali
fornia\, Davis\n\nI will discuss joint work with Olga Plamenevskaya studyi
ng symplectic\nfillings of links of certain complex surface singularities\
, and\ncomparing symplectic fillings with complex smoothings. We develop\n
characterizations of the symplectic fillings using planar Lefschetz\nfibra
tions and singular braided surfaces. This provides an analogue of\nde Jong
and van Straten's work which characterizes the complex\nsmoothings in ter
ms of decorated complex plane curves. We find\ndifferences between symplec
tic fillings and complex smoothings that\nhad not previously been found in
rational complex surface\nsingularities.\n
DTSTART:20210507T131500Z
DTEND:20210507T144500Z
LAST-MODIFIED:20210429T130938Z
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-70
END:VEVENT
BEGIN:VEVENT
UID:737ea20b-0f56-4cfd-bea9-66bac603e046
DTSTAMP:20210622T223734Z
CREATED:20210507T082504Z
DESCRIPTION:Topic: The ACT View of the Galactic Center\n\nSpeakers: Yilun G
uan & Brandon Hensley\n\nAffiliation: University of Pittsburgh & Princeton
University\n\nWe present new maps of the Galactic Center in total intensi
ty and\npolarization made with the Atacama Cosmology Telescope (ACT). We\n
combine dedicated\, arcminute-resolution ACT observations over a 32\ndeg^2
field with Planck intensity and polarization data at similar\nfrequencies
to produce maps with fidelity on both small and large\nangular scales. In
this talk\, we first describe the mapmaking\nprocedure\, including a nove
l treatment of bright sources that will be\nused in future ACT data releas
es. We then showcase detailed new views\nof known radio and submillimeter
sources in the Galactic center\,\nincluding supernova remnants\, pulsar wi
nd nebulae\, molecular clouds\,\nand non-thermal radio filaments\, highlig
hting in particular how ACT\nreveals the small-scale morphology of Galacti
c magnetic fields.\nFinally\, we discuss future prospects for leveraging C
MB data for\nGalactic science analyses in ACT\, Simons Observatory\, and b
eyond.\n
DTSTART:20210507T160000Z
DTEND:20210507T170000Z
LAST-MODIFIED:20210507T083013Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-group-semin
ar-4
END:VEVENT
BEGIN:VEVENT
UID:8112e675-d5ca-4cbd-bc6d-179d13c7164a
DTSTAMP:20210622T223734Z
CREATED:20210219T150837Z
DESCRIPTION:Topic: RESSCHEDULING\n\nSpeakers: Bhawna Motwani\n\nAffiliation
: Columbia University\n\nEach week\, we hold a relatively informal seminar
/discussion series\nwith an emphasis on extra-galactic and large-scale str
ucture\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 g
reater\ndetail than may be explained within the text of the article. To ai
d\nwith discussion\, only the article PDF is presented -- no\npowerpoint-s
tyle slides. Galread discussions are very friendly and\ninteractive.\n
DTSTART:20210510T150000Z
DTEND:20210510T160000Z
LAST-MODIFIED:20210507T143758Z
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:87ecf18e-3e4f-45de-b153-7bf4d9e69dcd
DTSTAMP:20210622T223734Z
CREATED:20210503T131853Z
DESCRIPTION:Topic: A Complexity-Theoretic Perspective on Fairness\n\nSpeake
rs: Michael P. Kim\n\nAffiliation: University of California\, Berkeley\; V
isitor\, School of Mathematics\n\nAlgorithms make predictions about people
constantly. The spread of\nsuch prediction systems has raised concerns t
hat algorithms may\nexhibit unfair discrimination\, especially against ind
ividuals from\nminority groups. While it's easy to speculate on the risks
of unfair\nprediction\, devising an effective definition of algorithmic f
airness\nis challenging. In this talk\, we will give a high-level introdu
ction\nto one prominent notion from the algorithmic fairness toolbox\, cal
led\nmulti-calibration. Multi-calibration requires that algorithmic\npred
ictions be well-calibrated (unbiased)\, not simply overall\, but\nsimultan
eously over a rich collection of subpopulations. This\n``multi-group'' no
tion strengthens the guarantees of group fairness\ndefinitions\, without i
ncurring the cost (statistical and\ncomputational) associated with individ
ual protections. Our focus\nwill be on the definition of multi-calibratio
n\, motivating it as an\neffective strategy for fairness in prediction\, a
s well as highlighting\nconnections to other concepts in learning theory a
nd pseudorandomness.\n\nThe talk will assume no prior knowledge on algorit
hmic fairness\,\naiming to be accessible to a broad theory audience.\n
DTSTART:20210510T151500Z
DTEND:20210510T161500Z
LAST-MODIFIED:20210510T112539Z
LOCATION:Simonyi Hall 101 and 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-483
END:VEVENT
BEGIN:VEVENT
UID:c3c1f286-9097-46cd-a8a2-cace4b90a4fa
DTSTAMP:20210622T223734Z
CREATED:20210114T152756Z
DESCRIPTION:Topic: Orbital Decay of Short-Period Exoplanets via Tidal Reson
ance Locking\n\nSpeakers: Jim Fuller\n\nAffiliation: California Institute
of Technology\n\nA large fraction of known exoplanets have short orbital p
eriods where\ntidal excitation of gravity waves within the host star cause
s the\nplanets’ orbits to decay. We study the effects of tidal resonance\n
locking\, in which the planet locks into resonance with a tidally\nexcited
stellar gravity mode. Because a star’s gravity mode\nfrequencies typicall
y increase as the star evolves\, the planet’s\norbital frequency increases
in lockstep\, potentially causing much\nfaster orbital decay than predict
ed by other tidal theories. Due to\nnon-linear mode damping\, resonance lo
cking in Sun-like stars likely\nonly operates for low-mass planets (M <= 0
.1MJup)\, but in stars with\nconvective cores it can likely operate for al
l planetary masses. The\nresonance locking orbital decay time scale is typ
ically comparable to\nthe star’s main sequence life time\, corresponding t
o a wide range in\neffective stellar quality factor (10^3 < Q′ < 10^9)\, d
epending on\nthe planet’s mass and orbital period. We make predictions for
\nseveral individual systems and examine the orbital evolution resulting\n
from both resonance locking and non-linear wave dissipation. Our\nmodels d
emonstrate how short-period massive planets can be quickly\ndestroyed due
to non-linear mode damping\, while short-period low-mass\nplanets can surv
ive\, even though they undergo substantial inward tidal\nmigration via res
onance locking.\n
DTSTART:20210510T160000Z
DTEND:20210510T170000Z
LAST-MODIFIED:20210507T090316Z
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:a848f8cb-2947-4dd5-b6b4-bf1e65c17c38
DTSTAMP:20210622T223734Z
CREATED:20210114T150746Z
DESCRIPTION:Topic: Topic 1: Paper presentation Origin of Parity Violation T
opic 2: Paper presentation on CosmicRIM\n\nSpeakers: Susan Clark and Chira
g Modi\n\nAffiliation: The Institute for Advanced Study and Flatiron Insti
tute\n\nChirag Modi from Flatiron Institute will present his recent\npaper
https://arxiv.org/abs/2104.12864.\n[https://arxiv.org/abs/2104.12864]\n\n
Susan Clark from IAS will discuss her recent\nwork https://arxiv.org/abs/2
105.00120v1.\n[https://arxiv.org/abs/2105.00120v1]\n
DTSTART:20210510T163000Z
DTEND:20210510T180000Z
LAST-MODIFIED:20210510T123826Z
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:3c0475b8-fd3d-4db3-af35-84a9cf469f39
DTSTAMP:20210622T223734Z
CREATED:20210323T170046Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210510T203000Z
DTEND:20210510T213000Z
LAST-MODIFIED:20210426T125623Z
LOCATION:
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-148
END:VEVENT
BEGIN:VEVENT
UID:e59ad322-3f47-4049-8f76-c67c2332fc1b
DTSTAMP:20210622T223734Z
CREATED:20210409T174001Z
DESCRIPTION:Topic: Automorphic gluing functor in Betti geometric Langlands
\n\nSpeakers: David Nadler\n\nAffiliation: University of California\, Berk
eley\n\nI'll discuss joint work with Zhiwei Yun constructing a natural fun
ctor\nfrom the automorphic category of a nodal curve to the automorphic\nc
ategory of a smoothing. The results depend on the microlocal geometry\nof
sheaves with nilpotent singular support. They also raise some\ninteresting
general microlocal questions.\n
DTSTART:20210511T200000Z
DTEND:20210511T220000Z
LAST-MODIFIED:20210506T145533Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-25
END:VEVENT
BEGIN:VEVENT
UID:ea619aa5-166f-42f7-ae5a-b75876479455
DTSTAMP:20210622T223734Z
CREATED:20210114T163641Z
DESCRIPTION:Topic: Ocean Worlds of the Outer Solar System\n\nSpeakers: Alex
Hayes\n\nAffiliation: Cornell University\n\nTitan is the only solar syste
m body besides Earth that supports\nstanding bodies of liquid on its surfa
ce. There’s compelling\nevidence that beneath Europa’s icy shell is a glob
al ocean of liquid\nwater. Might these support life? Solar system explorat
ion stands on\nthe verge of a golden age of exploration\, with the opportu
nity\nto search for signs of life in one or more of the ocean worlds of\nt
he outer solar system within the next two decades. Prof. Hayes’\ntalk will
review what we know about the habitability of the ocean\nworlds Europa\,
Enceladus\, and Titan\, and discuss upcoming mission\nconcepts designed to
determine if they are\, in fact\, inhabited. \n
DTSTART:20210511T233000Z
DTEND:20210512T013000Z
LAST-MODIFIED:20210430T082556Z
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:5b0fb75f-e514-4cd7-9f0e-811a35e0b9d1
DTSTAMP:20210622T223734Z
CREATED:20210416T213644Z
DESCRIPTION:Topic: Frobenius exact symmetric tensor categories\n\nSpeakers:
Pavel Etingof\n\nAffiliation: Massachusetts Institute of Technology\n\nI
will report on a joint work in progress with K. Coulembier and V.\nOstrik.
We show that a symmetric tensor category in characteristic $p\n> 0$ admit
s a fiber functor to the Verlinde category\n(semisimplification of $Rep(Z/
p)$) if and only if it has moderate\ngrowth and its Frobenius functor (an
analog of the classical Frobenius\nin the representation theory of algebra
ic group) is exact. For\nexample\, for $p = 2$ and $3$ this implies that a
ny such category is\n(super)-Tannakian. We also give a characterization of
super-Tannakian\ncategories for $p > 3$. This generalizes Deligne's theor
em that any\nsymmetric tensor category over $C$ of moderate growth is\nsup
er-Tannakian to characteristic $p$. At the end I'll discuss\napplications
of this result to modular representation theory.\n
DTSTART:20210512T190000Z
DTEND:20210512T210000Z
LAST-MODIFIED:20210510T134501Z
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-30
END:VEVENT
BEGIN:VEVENT
UID:d3c5f27d-ea15-4aaf-8854-bac66c821a65
DTSTAMP:20210622T223734Z
CREATED:20210329T182539Z
DESCRIPTION:Topic: Symmetries in symbolic dynamics\n\nSpeakers: Bryna Kra\n
\nAffiliation: Northwestern University\n\nOriginating in the work of Hadam
ard in the 1890’s on the coding of\ngeodesic flow\, symbolic dynamics has
become a key tool for studying\ntopological\, smooth\, and measurable dyna
mical systems. The\nautomorphism group of a symbolic system capture its sy
mmetries\,\nreflecting the dynamical behavior and the complexity of the sy
stem. I\nwill give an overview of relations among dynamical properties of
the\nsystem\, algebraic properties of the automorphism group\, and measura
ble\nproperties of associated systems\, all of which quickly lead to open
\nquestions.\n
DTSTART:20210512T213000Z
DTEND:20210512T230000Z
LAST-MODIFIED:20210506T142346Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-213
END:VEVENT
BEGIN:VEVENT
UID:b231b836-694e-474e-b379-0c61b7a9a201
DTSTAMP:20210622T223734Z
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:7bec08f6-1a7c-4b41-92f1-92547d994bb3
DTSTAMP:20210622T223734Z
CREATED:20210409T174810Z
DESCRIPTION:Topic: Kazhdan-Lusztig equivalence\n\nSpeakers: Pablo Boixeda A
lvarez\n\nAffiliation: Member\, School of Mathematics\n\nThe talk introduc
es the Kazhdan-Lusztig equivalence between the\nKazhdan-Lusztig category o
f representations of affine algebra and\ncategory of modules over the quan
tum group.\n
DTSTART:20210513T200000Z
DTEND:20210513T220000Z
LAST-MODIFIED:20210513T125259Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-14
END:VEVENT
BEGIN:VEVENT
UID:65c438e1-fa8a-4b45-95ad-4ca5abd1d178
DTSTAMP:20210622T223734Z
CREATED:20210405T182720Z
DESCRIPTION:Topic: Expansion and parity\n\nSpeakers: Maksym Radziwill\n\nAf
filiation: California Institute of Technology\n\nI will discuss recent wor
k with Harald Helfgott in which we establish\nroughly speaking that the gr
aph connecting $n$ to $n \pm p$ with $p$ a\nprime dividing $n$ is almost '
locally Ramanujan'. As a result we\nobtain improvements of results of Tao
and Tao-Teravainen on\nlogarithmic Chowla. I will discuss the main ideas i
n the proof and the\nconnections with logarithmic Chowla.\n
DTSTART:20210513T203000Z
DTEND:20210513T213000Z
LAST-MODIFIED:20210513T125718Z
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-451
END:VEVENT
BEGIN:VEVENT
UID:32202edb-6bc2-48ff-a7f8-b2b4d1a6a200
DTSTAMP:20210622T223734Z
CREATED:20210405T150442Z
DESCRIPTION:Topic: Caustics of Lagrangian homotopy spheres with stably triv
ial Gauss map\n\nSpeakers: Daniel Alvarez-Gavela\n\nThe h-principle for th
e simplification of caustics (i.e. Lagrangian\ntangencies) reduces a geome
tric problem to a homotopical problem. In\nthis talk I will explain the so
lution to this homotopical problem in\nthe case of spheres. More precisely
\, I will show that the stably\ntrivial elements of the nth homotopy group
of the Lagrangian\nGrassmannian $U_n/O_n$\, which lies in the metastable
range\, admit\nrepresentatives with only fold type tangencies. By the h-pr
inciple\, it\nfollows that if $D$ is a Lagrangian distribution defined alo
ng a\nLagrangian homotopy sphere $L$\, then there exists a Hamiltonian\nis
otopy which simplifies the tangencies between $L$ and $D$ to consist\nonly
of folds if and only if $D$ is stably trivial. I will give two\napplicati
ons of this result\, one to the arborealization program and\nanother to th
e study of nearby Lagrangian homotopy spheres. Joint work\nwith David Darr
ow (in the form of an undergraduate research project).\n
DTSTART:20210514T131500Z
DTEND:20210514T144500Z
LAST-MODIFIED:20210429T131124Z
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-71
END:VEVENT
BEGIN:VEVENT
UID:663f7b06-08d7-402e-97f9-c7ba5e2bff86
DTSTAMP:20210622T223734Z
CREATED:20210205T161510Z
DESCRIPTION:Topic: Alfvénic fluctuations and switchbacks in the solar wind
\n\nSpeakers: Anna Tenerani\n\nAffiliation: University of Texas\, Austin\n
\nLarge amplitude\, turbulent Alfvénic fluctuations have been commonly\nob
served in the solar wind since the first in-situ measurements\, and\nthey
are thought to provide a possible mechanism to heat the\nsolar corona and
accelerate the solar wind. Despite Alfvénic\nfluctuations have been studie
d for many decades now\, a complete\nunderstanding of their origin and non
linear evolution still remains\nelusive. Observations show that such fluct
uations are characterized\nby a nearly constant magnetic field amplitude\,
a condition which\nremains largely to be understood and that points to an
intrinsic\ndegree of coherence of s such fluctuations. The Parker Solar P
robe\nmission\, by probing regions of space never explored before closer t
o\nthe sun\, has provided a wealth of data showing the ubiquitous and\nper
sistent occurrence of the so-called switchbacks. Switchbacks are\nmagnetic
field lines which are strongly perturbed to the point that\nthey lead to
local inversions of the radial magnetic field. The\ncorresponding signatur
e in the velocity field is that of a local\nradial speed jet displaying th
e well-known velocity/magnetic field\ncorrelation that characterizes Alfvé
n waves propagating away from\nthe Sun. Switchbacks are thus an extreme ca
se of those Alfvénic\nfluctuations that permeate the solar wind further aw
ay. While there\nis not yet a general consensus on what is the origin of s
witchbacks\nand their connection to coronal activity\, a first necessary s
tep is to\nunderstand how they evolve and how long they can persist in the
solar\nwind. In this talk\, we will discuss the evolution of Alfvénic\nfl
uctuations and switchbacks in the solar wind. We will focus on how\ntheir
evolution is affected by parametric instabilities and the\npossible role o
f expansion and kinetic effects by comparing theory\nwith observations in
the inner heliosphere. We will finally discuss\nwhat are the implications
of our results for models of switchback\ngeneration and related open quest
ions.\n
DTSTART:20210514T163000Z
DTEND:20210514T180000Z
LAST-MODIFIED:20210507T084746Z
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:75f8d231-c83e-49e2-a8db-b8d8f3683e42
DTSTAMP:20210622T223734Z
CREATED:20210114T143004Z
DESCRIPTION:Topic: CECILIA (Chemical Evolution Constrained using Ionized Li
nes in Interstellar Aurorae)\n\nSpeakers: Allison Strom\n\nAffiliation: Pr
inceton University\n\nEach week\, we hold a relatively informal seminar/di
scussion series\nwith an emphasis on extra-galactic and large-scale struct
ure\nastrophysics.\n\nDuring Galread a leader/visitor presents a recent pa
per to the\ndiscussion group. The PDF of the paper is projected onto a lar
ge\nscreen\, and a guest explains the paper\, section by section\, in grea
ter\ndetail than may be explained within the text of the article. To aid\n
with discussion\, only the article PDF is presented -- no\npowerpoint-styl
e slides. Galread discussions are very friendly and\ninteractive.\n
DTSTART:20210517T150000Z
DTEND:20210517T160000Z
LAST-MODIFIED:20210514T115123Z
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:dd4072bf-bd6a-45f3-9e56-9adfb97c0213
DTSTAMP:20210622T223734Z
CREATED:20210114T152819Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210517T160000Z
DTEND:20210517T170000Z
LAST-MODIFIED:20210514T120536Z
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:fd2fe2fb-2a3b-411e-b27a-d124954e607c
DTSTAMP:20210622T223734Z
CREATED:20210114T150821Z
DESCRIPTION:Topic: Topic 1: Bootstrap rules for cosmological correlators To
pic 2: Narrowing the mass range of Ultra-light Dark Matter\n\nSpeakers: Sp
eaker 1: Hayden Lee Speaker 2: Elisa Ferreira\n\nAffiliation: Harvard Univ
ersity\; Max Planck Institute for Astrophysics\n\nAbstract 1: It is well k
nown that the structure of perturbative\nscattering amplitudes is strongly
constrained by physical principles\nsuch as locality\, unitarity\, and sy
mmetries. In this talk\, I will\ndescribe how similar principles can be us
ed to efficiently bootstrap\ncorrelations of primordial fluctuations. In p
articular\, I will show\nthat bulk locality and unitarity together imply a
powerful constraint\nin the form of cutting rules\, and present a method
to obtain\ncomplicated correlators from simpler building blocks by differe
ntial\noperations.\n\nAbstract 2: Among the many possible candidates for t
he nature of dark\nmatter\, one of the most well-motivated class of models
and leading\ncandidate is the ultra-light dark matter. This class represe
nts the\nlightest possible dark matter candidates\, and exhibits a wave-li
ke\nbehavior on galactic scales. This leads to a rich phenomenology on\nsm
all scales that can potentially not only reconcile the CDM picture\nwith t
he small scale behavior of dark matter\, but offer us the unique\npossibil
ity to probe their distinctive predictions\, and imprints that\ncan reveal
clues about the internal properties of dark matter. In this\ntalk\, I wil
l review this class of models\, describing and classifying\nthe different
constructions and their phenomenology. Given their vast\ncosmological and
astrophysical effects on observables\, I will describe\nthe ongoing advanc
es in constraining these models using current\ngravitational tests\, and h
ighlight the strong constraining power of\nsmall scale astrophysical obser
vations. In the case of the fuzzy dark\nmatter class of models\, I will sh
ow the latest constraints and how we\nare narrowing down the mass range av
ailable for these models.\n
DTSTART:20210517T163000Z
DTEND:20210517T180000Z
LAST-MODIFIED:20210514T120257Z
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:d88a7c94-611c-479f-8d93-cfb5fd0da084
DTSTAMP:20210622T223734Z
CREATED:20210323T170100Z
DESCRIPTION:Topic: Eigenfunction concentration via geodesic beams\n\nSpeake
rs: Yaiza Canzani\n\nAffiliation: University of North Carolina\n\nA vast a
rray of physical phenomena\, ranging from the propagation of\nwaves to the
location of quantum particles\, is dictated by the\nbehavior of Laplace e
igenfunctions. Because of this\, it is crucial to\nunderstand how various
measures of eigenfunction concentration respond\nto the background dynamic
s of the geodesic flow. In collaboration with\nJ. Galkowski\, we developed
a framework to approach this problem that\nhinges on decomposing eigenfun
ctions into geodesic beams. In this\ntalk\, I will present these technique
s and explain how to use them to\nobtain quantitative improvements on the
standard estimates for the\neigenfunction's pointwise behavior\, Lp norms\
, and Weyl Laws. One\nconsequence of this method is a quantitatively impro
ved Weyl Law for\nthe eigenvalue counting function on all product manifold
s.\n
DTSTART:20210517T203000Z
DTEND:20210517T213000Z
LAST-MODIFIED:20210517T113716Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-149
END:VEVENT
BEGIN:VEVENT
UID:5147b933-3e6e-4139-93bd-432260db180d
DTSTAMP:20210622T223734Z
CREATED:20210407T164533Z
DESCRIPTION:Topic: Beyond Ethiopia: The Islamic Intellectual History of the
Horn of Africa\n\nThis is the fourth and final event of a webinar series
IAS Ethiopian\nStudies\n\nCONVENORS: Suzanne Akbari (IAS)\, Aaron Butts (C
UA / IAS)\, Samantha L.\nKelly (Rutgers U / IAS)\, Sabine Schmidtke (IAS)
\n\nMuch progress has been made over the past decade in the study of\nMusl
im Ethiopia\, and with the ongoing work of digitizing\, cataloguing\nand a
nalyzing the local Muslim manuscript tradition\, scholars are in a\nbetter
position than ever before to assess the intellectual strands\nprevalent a
mong the Muslims of Ethiopia at any given time in history.\nOur objective
for the webinar is threefold: First\, we would like to\nget a clearer pict
ure of what still needs to be done in terms of\nsalvaging and providing ac
cess to the Muslim manuscript tradition of\nEthiopia (or Ethiopian provena
nce) — what are the challenges and\nwhat would be the promises? Secondly\,
we hope to engage in a\ndiscussion that will assess the intellectual trad
itions prevalent\namong Ethiopian Muslims\, e.g. legal traditions\, doctri
nal stances\, and\nother prevalent expressions of Islamic identity\, throu
ghout history.\nThirdly\, we intend to engage in a discussion that will si
tuate the\nintellectual history of Muslim Ethiopia beyond its core region
and\ndiscuss how it intersected over the centuries with other prevalent\ns
trands and developments\, such as the Horn of Africa (including\nEritrea\,
Djibouti\, Somalia)\, Southern Arabia (Yemen)\, as well as East\nAfrica o
r even the Indian Ocean network. Lastly\, we are eager to think\ntogether
about where the study of Muslim Ethiopia stands within the\nlarger picture
of Ethiopian Studies. REGISTER IN ADVANCE FOR THIS\nMEETING HERE\n[https:
//theias.zoom.us/webinar/register/WN_6ZUVkUsnQM271HngNrlIAQ].\n\nPanelists
:\nMARIA BULAKH (Institute for Oriental and Classical Studies\, National\n
Research University Higher School of Economics\, Moscow)\nALESSANDRO GORI
(University of Copenhagen)\nHASSEN MUHAMMAD KAWO (University of Cape Town\
, South Africa)\nPAUL M. LOVE (Al Akhawayn University)\nANNE REGOURD (Cent
re National de la Recherche Scientifique\, Paris)\n\n \n
DTSTART:20210520T160000Z
DTEND:20210520T173000Z
LAST-MODIFIED:20210412T133839Z
LOCATION:ZOOM Meeting
SUMMARY:IAS Ethiopian Studies Series
URL:https://www.ias.edu/hs/events/ias-ethiopian-studies-series-1
END:VEVENT
BEGIN:VEVENT
UID:7c8fff8b-699c-4b27-bf62-cf1ae9a8d5a5
DTSTAMP:20210622T223734Z
CREATED:20210409T174823Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210520T200000Z
DTEND:20210520T220000Z
LAST-MODIFIED:20210514T141543Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-15
END:VEVENT
BEGIN:VEVENT
UID:3acfc8a9-4003-444a-893e-2e8fee461b08
DTSTAMP:20210622T223734Z
CREATED:20210405T150456Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210521T131500Z
DTEND:20210521T144500Z
LAST-MODIFIED:20210405T170507Z
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-72
END:VEVENT
BEGIN:VEVENT
UID:14923511-974f-4ee2-8273-8a5f18fcf427
DTSTAMP:20210622T223734Z
CREATED:20210219T151050Z
DESCRIPTION:Topic: The Stellar Initial Mass Function in the Center of Massi
ve Early-Type Galaxies\n\nSpeakers: Meng Gu\n\nAffiliation: Princeton Univ
ersity\n\nEach week\, we hold a relatively informal seminar/discussion ser
ies\nwith an emphasis on extra-galactic and large-scale structure\nastroph
ysics.\n\nDuring Galread a leader/visitor presents a recent paper to the\n
discussion 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 discuss
ion\, only the article PDF is presented -- no\npowerpoint-style slides. Ga
lread discussions are very friendly and\ninteractive.\n
DTSTART:20210524T150000Z
DTEND:20210524T160000Z
LAST-MODIFIED:20210521T172630Z
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:5aacbec3-2c91-420f-84da-de101d42eb4b
DTSTAMP:20210622T223734Z
CREATED:20210331T211725Z
DESCRIPTION:Topic: Representation Theory & Combinatorics of the Symmetric G
roup and Related Structures\n\nSpeakers: Monica Vazirani\n\nAffiliation: U
niversity of California\, Davis\n\nWith an eye toward coordinating with th
e advanced course\, we will\nstart with the representation theory of the s
ymmetric group and\nrelated combinatorics. We will focus on the functors o
f induction and\nrestriction. We will then consider related algebraic stru
ctures such\nas Hecke algebras. We can use diagrammatics to depict various
\nelements\, objects\, morphisms\, and so on\, even in the setting of\nde-
categorification.\n
DTSTART:20210524T150000Z
DTEND:20210524T160000Z
LAST-MODIFIED:20210521T142706Z
LOCATION:Virtual
SUMMARY:2021 Women and Mathematics
URL:https://www.ias.edu/math/events/2021-women-and-mathematics-0
END:VEVENT
BEGIN:VEVENT
UID:1e7aa44f-1af9-4c9f-8784-813ffe61b41b
DTSTAMP:20210622T223734Z
CREATED:20210114T152842Z
DESCRIPTION:Topic: Transformative advances in post-main-sequence planetary
system science\n\nSpeakers: Dimitri Veras\n\nAffiliation: University of Wa
rwick\n\nConnecting planetary systems at different stages of stellar evolu
tion\nhelps us understand their formation\, evolution\, and fate\, and pro
vides\nus with exclusive and crucial insights about their dynamics and\nch
emistry. Post-main-sequence white dwarf and giant branch stars host\nplane
tary systems which include a variety of observed objects and\nphenomena\,
such as planetary debris discs\, disintegrating and embedded\nasteroids\,
exo-comets\, photospheric metal pollution\, and planets\nthemselves. Here\
, I provide a review of both our current knowledge of\nthese systems and m
odels which have been used to explain them. I also\nhighlight the transfor
mative advances expected in upcoming years with\nthe current and next gene
ration of ground-based and space-based\ninitiatives.\n
DTSTART:20210524T160000Z
DTEND:20210524T170000Z
LAST-MODIFIED:20210524T105643Z
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:75ffe52d-ba97-4bb1-931a-a2ffe3484cef
DTSTAMP:20210622T223734Z
CREATED:20210331T211658Z
DESCRIPTION:Topic: Representation Theory & Categorification\n\nSpeakers: Ca
tharina Stroppel\n\nAffiliation: University of Bonn\n\nIn modern represent
ation theory we often study the category of modules\nover an algebra\, in
particular its intrinsic and combinatorial\nstructures. Vice versa one can
ask the question: which categories have\na given combinatorics? This is t
he basic insight into the concept of\ncategorification. Categorification i
s a recent development which often\nprovides finer invariants and is used
in different areas of\nmathematics (such as knot theory). We will explain
a crucial\ningredient in categorification: diagrammatics of tensor categor
ies. We\nwill focus on a few examples that arise in current research\, suc
h as\nDeligne categories. This course provides a categorical framework for
\nthe structures studied in the elementary course.\n
DTSTART:20210524T161500Z
DTEND:20210524T171500Z
LAST-MODIFIED:20210521T142616Z
LOCATION:Virtual
SUMMARY:2021 Women and Mathematics
URL:https://www.ias.edu/math/events/2021-women-and-mathematics
END:VEVENT
BEGIN:VEVENT
UID:0dc6c212-cf21-4955-b8dc-fcb5308f1e83
DTSTAMP:20210622T223734Z
CREATED:20210114T150846Z
DESCRIPTION:Topic: Topic 1: Unlocking the Nature of Dark Matter with Gravit
ational Lensing Topic 2: Massive Galileons and Vainshtein screening: a num
erical perspective\n\nSpeakers: Cora Dvorkin\, Daniela Saadeh\n\nAffiliati
on: Harvard University\; Portsmouth\n\nAbstract 1: Cosmological observatio
ns and galaxy dynamics seem to\nimply that 84% of all matter in the univer
se is\ncomposed of dark matter\, which is not accounted for\nby the Standa
rd\nModel of particles. The particle nature of dark matter is\none of the
most intriguing puzzles of our\ntime. The wealth of knowledge which is and
will soon be\navailable from cosmological surveys will reveal new informa
tion\nabout our universe. I will discuss how we can use\nnew and complemen
tary data sets to improve our\nunderstanding of the particle nature of dar
k matter.\nIn particular\, galaxy-scale strong gravitational lensing provi
des a\nunique way to detect and characterize dark matter on small scales.
I\nwill present advances in the analysis of gravitational lenses and\niden
tification of small-scale clumps using machine learning. I will\nintroduce
the convergence power spectrum as a promising statistical\nobservable tha
t can be extracted from strongly lens images and used to\ndistinguish betw
een different dark matter scenarios\, showing how\ndifferent properties of
the dark matter get imprinted at different\nscales. I will also discuss t
he different contribution of substructure\nand line-of-sight structure to
perturbations in strong lens images.\n\nAbstract 2: The phenomenology of d
ark energy may be explained by an\nextra scalar particle mediating a fifth
force at cosmological scales.\nHowever\, stringent limits on the existenc
e of extra forces have been\nplaced by solar-system experiments: viable mo
dels must therefore be\nable to screen (i.e. suppress) the fifth force in
environments where\nit is known to be small.\nSeveral screening mechanisms
have been proposed. However\, progress in\nunderstanding their behaviour
has been hindered by the complexity of\nthe field equations involved\, whi
ch are nonlinear in nature and\ncharacterised by a large hierarchy of scal
es. This is especially true\nof Vainshtein screening\, where the fifth for
ce is suppressed by\nhigh-order derivative terms becoming dominant within
a large\nVainshtein radius.\nI will present \phi-enics\, a numerical code
based on the finite\nelement method that can be used to overcome this prob
lem. I will use\n\phi-enics to perform a theoretical test of Vainshtein sc
reening\, by\ncomparing the behaviour of a set of massive Galileon theorie
s\nexhibiting screening with their UV completion. We show that the\nscreen
ing does not survive the extension\, casting doubt over whether\nVainshtei
n screening can take place within the limits of validity of\nthe theories
that invoke it.\n
DTSTART:20210524T163000Z
DTEND:20210524T180000Z
LAST-MODIFIED:20210521T171004Z
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:53b311a5-55db-4754-86bf-50fba85b90b5
DTSTAMP:20210622T223734Z
CREATED:20210323T170114Z
DESCRIPTION:Topic: The Schrodinger equations as inspiration of beautiful ma
thematics\n\nSpeakers: Gigliola Staffilani\n\nAffiliation: Massachusetts I
nstitute of Technology\n\nIn the last two decades great progress has been
made in the study of\ndispersive and wave equations. Over the years the to
olbox used in\norder to attack highly nontrivial problems related to these
equations\nhas developed to include a collection of techniques: Fourier a
nd\nharmonic analysis\, analytic number theory\, math physics\, dynamical
\nsystems\, probability and symplectic geometry. In this talk I will\nintr
oduce a variety of results using as model problem mainly the\nperiodic 2D
cubic nonlinear Schrodinger equation. I will start by\ngiving a physical d
erivation of the equation from a quantum\nmany-particles system\, I will i
ntroduce periodic Strichartz estimates\nalong with some remarkable connect
ions to analytic number theory\, I\nwill move on the concept of energy tra
nsfer and its connection to\ndynamical systems\, and I will end with some
results on the derivation\nof a wave kinetic equation.\n
DTSTART:20210524T203000Z
DTEND:20210524T213000Z
LAST-MODIFIED:20210524T132511Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-150
END:VEVENT
BEGIN:VEVENT
UID:1b6be9f2-c234-4082-8bf7-46452f7feb8d
DTSTAMP:20210622T223734Z
CREATED:20210331T211830Z
DESCRIPTION:Topic: Representation Theory & Combinatorics of the Symmetric G
roup and Related Structures\n\nSpeakers: Monica Vazirani\n\nAffiliation: U
niversity of California\, Davis\n\nWith an eye toward coordinating with th
e advanced course\, we will\nstart with the representation theory of the s
ymmetric group and\nrelated combinatorics. We will focus on the functors o
f induction and\nrestriction. We will then consider related algebraic stru
ctures such\nas Hecke algebras. We can use diagrammatics to depict various
\nelements\, objects\, morphisms\, and so on\, even in the setting of\nde-
categorification.\n
DTSTART:20210525T150000Z
DTEND:20210525T160000Z
LAST-MODIFIED:20210521T142832Z
LOCATION:Virtual
SUMMARY:2021 Women and Mathematics
URL:https://www.ias.edu/math/events/2021-women-and-mathematics-2
END:VEVENT
BEGIN:VEVENT
UID:2307f612-c308-4cb3-aaa9-35484bf8f5bc
DTSTAMP:20210622T223734Z
CREATED:20210331T211805Z
DESCRIPTION:Topic: Representation Theory & Categorification\n\nSpeakers: Ca
tharina Stroppel\n\nAffiliation: University of Bonn\n\nIn modern represent
ation theory we often study the category of modules\nover an algebra\, in
particular its intrinsic and combinatorial\nstructures. Vice versa one can
ask the question: which categories have\na given combinatorics? This is t
he basic insight into the concept of\ncategorification. Categorification i
s a recent development which often\nprovides finer invariants and is used
in different areas of\nmathematics (such as knot theory). We will explain
a crucial\ningredient in categorification: diagrammatics of tensor categor
ies. We\nwill focus on a few examples that arise in current research\, suc
h as\nDeligne categories. This course provides a categorical framework for
\nthe structures studied in the elementary course.\n
DTSTART:20210525T161500Z
DTEND:20210525T171500Z
LAST-MODIFIED:20210521T142749Z
LOCATION:Virtual
SUMMARY:2021 Women and Mathematics
URL:https://www.ias.edu/math/events/2021-women-and-mathematics-1
END:VEVENT
BEGIN:VEVENT
UID:7bf167a9-94a4-4ac7-a42f-098d68af7a46
DTSTAMP:20210622T223734Z
CREATED:20210331T211901Z
DESCRIPTION:Topic: Geometric Categorifications of the Hecke Algebra \n\nSpe
akers: Laura Rider\n\nAffiliation: University of Georgia\n\nAbstract: In t
he first part of this talk\, I'll explain a geometric\ncategorification of
the Hecke algebra in terms of perverse sheaves on\nthe flag variety. In t
he second part\, we'll study the affine Hecke\nalgebra. In this case\, the
re are two categorical realizations: one\nusing perverse sheaves (on the a
ffine flag variety) and another using\ncoherent sheaves (on the Langlands
dual Steinberg variety). As time\npermits\, I'll explain some properties o
f these categories\,\nrelationships between them\, and some applications t
o representation\ntheory.\n
DTSTART:20210526T150000Z
DTEND:20210526T160000Z
LAST-MODIFIED:20210428T124706Z
LOCATION:Virtual
SUMMARY:2021 Women and Mathematics
URL:https://www.ias.edu/math/events/2021-women-and-mathematics-3
END:VEVENT
BEGIN:VEVENT
UID:4d71443e-c56a-4b86-a42f-89de484348a4
DTSTAMP:20210622T223734Z
CREATED:20210331T211931Z
DESCRIPTION:Topic: Beyond Abstract Algebra \n\nSpeakers: Chelsea Walton\n\n
Affiliation: Rice University\n\nAbstract: This is a tale about my adventur
es of being trained as a\nRing Theorist to now using Category Theory in my
work. This is\nsomething that I certainly did not predict when I defended
my thesis\n10 years ago\, but the best stories are unpredictable\, no? I
will\nhighlight some of my research and pedagogical work during this perio
d\,\nand will also discuss a few characters that played a pivotal role in
\nmy trajectory. Though it is full of unexpected twists and turns\, this\n
tale does have a happy ending.\n
DTSTART:20210526T183000Z
DTEND:20210526T193000Z
LAST-MODIFIED:20210409T175228Z
LOCATION:Virtual
SUMMARY:2021 Women and Mathematics
URL:https://www.ias.edu/math/events/2021-women-and-mathematics-4
END:VEVENT
BEGIN:VEVENT
UID:b3da1a92-429d-4a0b-bf74-2ef8d2c55f1b
DTSTAMP:20210622T223734Z
CREATED:20210331T212035Z
DESCRIPTION:Topic: Representation Theory & Combinatorics of the Symmetric G
roup and Related Structures\n\nSpeakers: Monica Vazirani\n\nAffiliation: U
niversity of California\, Davis\n\nWith an eye toward coordinating with th
e advanced course\, we will\nstart with the representation theory of the s
ymmetric group and\nrelated combinatorics. We will focus on the functors o
f induction and\nrestriction. We will then consider related algebraic stru
ctures such\nas Hecke algebras. We can use diagrammatics to depict various
\nelements\, objects\, morphisms\, and so on\, even in the setting of\nde-
categorification.\n
DTSTART:20210527T150000Z
DTEND:20210527T160000Z
LAST-MODIFIED:20210521T143011Z
LOCATION:Virtual
SUMMARY:2021 Women and Mathematics
URL:https://www.ias.edu/math/events/2021-women-and-mathematics-6
END:VEVENT
BEGIN:VEVENT
UID:df9dd758-aeb7-4cad-9fa7-61375b3ec5dc
DTSTAMP:20210622T223734Z
CREATED:20210331T212010Z
DESCRIPTION:Topic: Representation Theory & Categorification\n\nSpeakers: Ca
tharina Stroppel\n\nAffiliation: University of Bonn\n\nIn modern represent
ation theory we often study the category of modules\nover an algebra\, in
particular its intrinsic and combinatorial\nstructures. Vice versa one can
ask the question: which categories have\na given combinatorics? This is t
he basic insight into the concept of\ncategorification. Categorification i
s a recent development which often\nprovides finer invariants and is used
in different areas of\nmathematics (such as knot theory). We will explain
a crucial\ningredient in categorification: diagrammatics of tensor categor
ies. We\nwill focus on a few examples that arise in current research\, suc
h as\nDeligne categories. This course provides a categorical framework for
\nthe structures studied in the elementary course.\n
DTSTART:20210527T161500Z
DTEND:20210527T171500Z
LAST-MODIFIED:20210521T142924Z
LOCATION:Virtual
SUMMARY:2021 Women and Mathematics
URL:https://www.ias.edu/math/events/2021-women-and-mathematics-5
END:VEVENT
BEGIN:VEVENT
UID:b42efd46-be3e-4e1d-afaf-de53e2056498
DTSTAMP:20210622T223734Z
CREATED:20210514T141410Z
DESCRIPTION:Topic: Kazhdan-Lusztig equivalence\n\nSpeakers: Pablo Boixeda A
lvarez\n\nAffiliation: Member\, School of Mathematics\n\nContinuation of t
he previous talk.\n
DTSTART:20210527T200000Z
DTEND:20210527T220000Z
LAST-MODIFIED:20210527T141506Z
LOCATION:Remote Access
SUMMARY:Quantum Groups Seminar
URL:https://www.ias.edu/math/events/quantum-groups-seminar-17
END:VEVENT
BEGIN:VEVENT
UID:52fce80c-6b2c-4aee-a0df-90149a8d3e91
DTSTAMP:20210622T223734Z
CREATED:20210520T192107Z
DESCRIPTION:Topic: Character estimates for classical finite simple groups\n
\nSpeakers: Michael Larsen\n\nAffiliation: Indiana University\, Bloomingto
n\n\nThis is intended to complement the recent talk of Pham Huu Tiep in\nt
his seminar but will not assume familiarity with that talk. The\nestimates
in the title are upper bounds of the form $|\chi(g)| \le\n\chi(1)^\alpha$
\, where $\chi$ is irreducible and $\alpha$ depends on\nthe size of the ce
ntralizer of $g$. I will briefly discuss geometric\napplications of such b
ounds\, explain how probability theory can be\nused to reduce to the case
of elements $g$ of small centralizer\,\ndiscuss the level theory of charac
ters\, and conclude with the\nreduction to the case of characters $\chi$ o
f large degree. For such\npairs $(g\,\chi)$\, exponential character bounds
are trivial.\n
DTSTART:20210527T203000Z
DTEND:20210527T213000Z
LAST-MODIFIED:20210527T141431Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-number-th
eory-seminar-452
END:VEVENT
BEGIN:VEVENT
UID:2978b6df-d9fb-4148-b936-6bae29e39c10
DTSTAMP:20210622T223734Z
CREATED:20210405T150509Z
DESCRIPTION:Topic: Three 20 minute research talks\n\nSpeakers: Oğuz Şavk\,
Irene Seifert\, Hang Yuan\n\nAffiliation: Boğaziçi University\; Heidelberg
University\; Stony Brook University\n\nOĞUZ ŞAVK (BOĞAZIÇI UNIVERSITY)\,
Classical and new plumbings\nbounding contractible manifolds and homology
balls\n\nA central problem in low-dimensional topology asks which homology
\n3-spheres bound contractible 4-manifolds and homology 4-balls. In this\n
talk\, we address this problem for plumbed 3-manifolds and we present\nthe
classical and new results together. Along the way\, we touch\nsymplectic
geometry by using the classical results of Eliashberg and\nGompf. Our appr
oach is based on Mazur’s famous argument which\nprovides a unification of
all results.\n\nIRENE SEIFERT (HEIDELBERG UNIVERSITY)\, Periodic delay orb
its and the\npolyfold IFT\n\nDifferential delay equations arise very natur
ally\, but they are much\nmore complicated than ordinary differential equa
tions. Polyfold\ntheory\, originally developed for the study of moduli spa
ces of\npseudoholomorphic curves\, can help to understand solutions of cer
tain\ndelay equations. In my talk\, I will show an existence result about
\nperiodic delay orbits with small delay. If time permits\, we can\ndiscus
s possible further applications of polyfold theory to the\ndifferential de
lay equations. This is joint work with Peter Albers.\n\nHANG YUAN (STONY B
ROOK UNIVERSITY)\, Disk counting via family Floer\ntheory\n\nGiven a famil
y of Lagrangian tori with full quantum corrections\, the\nnon-archimedean
SYZ mirror construction uses the family Floer theory\nto construct a non-a
rchimedean analytic space with a global\nsuperpotential. In this talk\, we
will first briefly review the\nconstruction. Then\, we will apply it to t
he Gross’s fibrations. As\nan application\, we can compute all the non-tri
vial open GW invariants\nfor a Chekanov-type torus in $CP^n$ or $CP^r \tim
es CP^{n-r}$. When $n\n= 2$\, $r = 1$\, we retrieve the previous results o
f Auroux an\nChekanov-Schlenk without finding the disks explicitly. It is
also\ncompatible with the Pascaleff-Tonkonog’s work on Lagrangian\nmutatio
ns.\n
DTSTART:20210528T131500Z
DTEND:20210528T144500Z
LAST-MODIFIED:20210526T170216Z
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-73
END:VEVENT
BEGIN:VEVENT
UID:b436f474-dd7c-466c-9d80-50f91f068420
DTSTAMP:20210622T223734Z
CREATED:20210331T212130Z
DESCRIPTION:Topic: Representation Theory & Combinatorics of the Symmetric G
roup and Related Structures\n\nSpeakers: Monica Vazirani\n\nAffiliation: U
niversity of California\, Davis\n\nWith an eye toward coordinating with th
e advanced course\, we will\nstart with the representation theory of the s
ymmetric group and\nrelated combinatorics. We will focus on the functors o
f induction and\nrestriction. We will then consider related algebraic stru
ctures such\nas Hecke algebras. We can use diagrammatics to depict various
\nelements\, objects\, morphisms\, and so on\, even in the setting of\nde-
categorification.\n
DTSTART:20210528T150000Z
DTEND:20210528T160000Z
LAST-MODIFIED:20210521T143149Z
LOCATION:Virtual
SUMMARY:2021 Women and Mathematics
URL:https://www.ias.edu/math/events/2021-women-and-mathematics-8
END:VEVENT
BEGIN:VEVENT
UID:90f1a027-7ed7-4672-9d17-ff3e974feb5e
DTSTAMP:20210622T223734Z
CREATED:20210521T172312Z
DESCRIPTION:Topic: The Universal Focal-Plane Module for the Simons Observat
ory\n\nSpeakers: Erin Healy\n\nAffiliation: Princeton University\n\nAt the
focus of the Simons Observatory telescopes\, the Universal\nFocal-Plane M
odules (UFMs) will detect and modulate the cosmic\nmicrowave background (C
MB) signal using a Microwave SQUID Multiplexing\n(uMux) readout architectu
re. This novel readout design enables the\nsimultaneous interrogation of 9
10 transition-edge sensor (TES)\ndetectors with a single pair of coaxial c
ables by coupling each\ndetector to a microwave resonator with a unique fr
equency between 4\nand 6 GHz. The breakthrough multiplexing factor (910x)
is two orders\nof magnitude higher than alternative readout architectures
for TESes\,\nwhich have become the standard detector choice for CMB\ninstr
umentation. I will describe the uMux implementation for Simons\nObservator
y\, discuss the design of the UFMs\, and show results from the\nearly prod
uction arrays.\n
DTSTART:20210528T160000Z
DTEND:20210528T170000Z
LAST-MODIFIED:20210528T143300Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-group-semin
ar-5
END:VEVENT
BEGIN:VEVENT
UID:403c6059-1419-46cf-95c1-13bc5b9c1207
DTSTAMP:20210622T223734Z
CREATED:20210331T212105Z
DESCRIPTION:Topic: Representation Theory & Categorification\n\nSpeakers: Ca
tharina Stroppel\n\nAffiliation: University of Bonn\n\nIn modern represent
ation theory we often study the category of modules\nover an algebra\, in
particular its intrinsic and combinatorial\nstructures. Vice versa one can
ask the question: which categories have\na given combinatorics? This is t
he basic insight into the concept of\ncategorification. Categorification i
s a recent development which often\nprovides finer invariants and is used
in different areas of\nmathematics (such as knot theory). We will explain
a crucial\ningredient in categorification: diagrammatics of tensor categor
ies. We\nwill focus on a few examples that arise in current research\, suc
h as\nDeligne categories. This course provides a categorical framework for
\nthe structures studied in the elementary course.\n
DTSTART:20210528T161500Z
DTEND:20210528T171500Z
LAST-MODIFIED:20210521T143104Z
LOCATION:Virtual
SUMMARY:2021 Women and Mathematics
URL:https://www.ias.edu/math/events/2021-women-and-mathematics-7
END:VEVENT
BEGIN:VEVENT
UID:b62646b1-1c3b-492d-832e-7b8c498c6015
DTSTAMP:20210622T223734Z
CREATED:20210115T163306Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210528T190000Z
DTEND:20210528T200000Z
LAST-MODIFIED:20210524T104908Z
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:94f76365-0603-46ec-b899-a8612b2bc565
DTSTAMP:20210622T223734Z
CREATED:20210323T170128Z
DESCRIPTION:Topic: No seminar: Memorial Day\n\n
DTSTART:20210531T203000Z
DTEND:20210531T213000Z
LAST-MODIFIED:20210517T140411Z
LOCATION:
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-151
END:VEVENT
BEGIN:VEVENT
UID:39880765-abba-4a0e-b74a-357435ebe997
DTSTAMP:20210622T223734Z
CREATED:20210405T150523Z
DESCRIPTION:Topic: Degenerations of Kahler forms on K3 surfaces\, and some
dynamics\n\nSpeakers: Simion Filip\n\nK3 surfaces have a rich geometry and
admit interesting holomorphic\nautomorphisms. As examples of Calabi-Yau m
anifolds\, they admit\nRicci-flat Kähler metrics\, and a lot of attention
has been devoted to\nhow these metrics degenerate as the Kähler class appr
oaches natural\nboundaries. I will discuss how to use the full automorphis
m group to\nanalyze the degenerations and obtain certain canonical objects
(closed\npositive currents) on the boundary. While most of the previous w
ork\nwas devoted to degenerating the metric along an elliptic fibration\n(
motivated by the SYZ picture of mirror symmetry) I will discuss how\nto an
alyze all the other points. Time permitting\, I will also describe\nthe co
nstruction of canonical heights on K3 surfaces (in the sense of\nnumber th
eory)\, generalizing constructions due to Silverman and Tate.\nJoint work
with Valentino Tosatti.\n
DTSTART:20210604T131500Z
DTEND:20210604T144500Z
LAST-MODIFIED:20210601T151554Z
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-74
END:VEVENT
BEGIN:VEVENT
UID:6dce66a7-46ae-442d-90ad-7d89fc2a9ad7
DTSTAMP:20210622T223734Z
CREATED:20210317T155657Z
DESCRIPTION:Topic: Shock physics in the merging galaxy cluster A2146\n\nSpe
akers: Helen Russell\n\nAffiliation: University of Nottingham\n\nThe galax
y cluster A2146 is undergoing a major merger and hosts two\nhuge\, bright
Mach 2 shock fronts\, which provide a unique opportunity\nto measure the e
lectron-ion equilibration timescale along with other\nkey transport phenom
ena. Collisionless shocks occur over a wide\nrange of scales from accreti
on shocks to supernova remnants and\nheliospheric shocks. However\, only
clusters\, particularly A2146\nallow us to map the large-scale equilibrati
on with a single\nobservation\, which is unaffected by cross-calibration u
ncertainties.\n I will present preliminary results from a new 2.4Ms Chandr
a\nobservation that provides a measure of this timescale\, reveals the\nde
tailed shock structure and traces the disruption of both cool cores\,\ninc
luding heating and mixing of cool gas blobs in ram pressure\nstripped tail
s.\n
DTSTART:20210604T153000Z
DTEND:20210604T170000Z
LAST-MODIFIED:20210524T111736Z
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:8fd1258d-4002-4f5b-a928-5e36079fb561
DTSTAMP:20210622T223734Z
CREATED:20210604T113201Z
DESCRIPTION:Topic: A Close-Up Look at the ACT Data Analysis Pipeline\n\nSpe
akers: Emilie Storer\n\nAffiliation: Princeton University\n\nThe Atacama C
osmology Telescope (ACT) is being used to observe the sky\nat arcminute re
solution in both temperature and polarization. The data\nwe collect are th
en mapped\, transformed into power spectra\, and used\nto derive constrain
ts on cosmological parameters. In this talk\, rather\nthan focus on ACT da
ta or results\, I will go over the intermediate\nsteps in our pipeline\, s
uch as how the maps are made\, how the beams\nare measured\, and how the p
ower spectra are computed. I will include\ndetails and plots from our last
data release\, DR4 (Aiola et al. 2020\nand Choi et al. 2020). I will then
give a sneak peek at some of the\nACT analysis currently under way.\n
DTSTART:20210604T160000Z
DTEND:20210604T170000Z
LAST-MODIFIED:20210604T113348Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-group-semin
ar-6
END:VEVENT
BEGIN:VEVENT
UID:d079ebed-fbcf-40d3-bfe2-461f43d79275
DTSTAMP:20210622T223734Z
CREATED:20210607T052919Z
DESCRIPTION:Topic: The Probabilistic Value-Added Catalog for the DESI Brigh
t Galaxy Survey\n\nSpeakers: ChangHoon Hahn\n\nAffiliation: Princeton Univ
ersity\n\nEach week\, we hold a relatively informal seminar/discussion ser
ies\nwith an emphasis on extra-galactic and large-scale structure\nastroph
ysics.\n\nDuring Galread a leader/visitor presents a recent paper to the\n
discussion 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 discuss
ion\, only the article PDF is presented -- no\npowerpoint-style slides. Ga
lread discussions are very friendly and\ninteractive.\n
DTSTART:20210607T150000Z
DTEND:20210607T160000Z
LAST-MODIFIED:20210607T053048Z
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-17
END:VEVENT
BEGIN:VEVENT
UID:9d00488b-a698-4f76-95f9-d4129e43f636
DTSTAMP:20210622T223734Z
CREATED:20210607T053119Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20210607T160000Z
DTEND:20210607T170000Z
LAST-MODIFIED:20210607T053210Z
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:058c346a-76fc-4c6f-a6b0-9cb9abe7680f
DTSTAMP:20210622T223734Z
CREATED:20210323T170143Z
DESCRIPTION:Topic: Geodesics and Laplace spectrum on 3D contact sub-Riemann
ian manifolds: the Reeb flow\n\nSpeakers: Yves Colin de Verdière\n\nAffili
ation: Institut Fourier\n\nJoint work with Luc Hillairet (Orléans) and Emm
anuel Trélat (Paris).\nA 3D closed manifold with a contact distribution an
d a metric on it\ncarries a canonical contact form. The associated Reeb fl
ow plays a\ncentral role for the asymptotics of the geodesics and for the
spectral\nasymptotics of the Laplace operator. I plan to describe it using
some\nBirkhoff normal forms.\n
DTSTART:20210607T203000Z
DTEND:20210607T213000Z
LAST-MODIFIED:20210607T193843Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-152
END:VEVENT
BEGIN:VEVENT
UID:57d0f775-93bb-4422-936e-bee10e615769
DTSTAMP:20210622T223734Z
CREATED:20210603T203326Z
DESCRIPTION:Topic: A Universal Law of Robustness via Isoperimetry - a paper
by Bubeck and Sellke\n\nSpeakers: Ronen Eldan\n\nAffiliation: Weizmann In
stitute of Science\; Visitor\, School of Mathematics\n\nVideo\nlink: https
://www.ias.edu/video/universal-law-robustness-isoperimetry-paper-bubeck-an
d-sellke\n
DTSTART:20210608T143000Z
DTEND:20210608T163000Z
LAST-MODIFIED:20210608T174803Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Reading Seminar
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-re
ading-seminar
END:VEVENT
BEGIN:VEVENT
UID:c338578d-bafe-44cd-8e03-5a7d4c38942b
DTSTAMP:20210622T223734Z
CREATED:20210114T162446Z
DESCRIPTION:Topic: First Star Formation and the Lunar Ultimately Large Tele
scope.\n\nSpeakers: Anna Schauer\n\nAffiliation: University of Texas at Au
stin\n\nDr. Schauer’s research focuses on the high-redshift Universe\,\nru
nning hydrodynamic\, cosmological simulations to study the first\nstars an
d black holes. She studies large-scale effects that influence\n“minihalos\
,” the early building blocks of galaxies. By\ninvestigating these first o
bjects\, she aims to understand how the\nUniverse through successive gener
ations of stars and supernovae\nunderwent the transition from metal-free t
o metal-enriched. Capturing\nthe light from objects so long ago and far aw
ay will take\nextraordinary instrumentation\, and to that end Dr. Schauer
is looking\nforward to observations using what she and her colleagues are
calling\nthe “Ultimately Large Telescope.” They hope to revive a design\np
roposed by Roger Angel and collaborators that described a 20-meter\ntelesc
ope (shown below) with a mirror of rotating liquid operating on\nthe Moon.
Dr. Schauer and colleagues believe that a 100-meter\ninstrument is feasib
le\, with which they could study the first stars\nthat formed in the Unive
rse\, the so-called Population III stars.\n
DTSTART:20210608T233000Z
DTEND:20210609T013000Z
LAST-MODIFIED:20210528T143654Z
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:9ac926a2-0264-4368-9f25-32b633cfe854
DTSTAMP:20210622T223734Z
CREATED:20210405T150537Z
DESCRIPTION:Topic: The homotopy type of the space of tight contact structur
es and the overtwisted mirage\n\nSpeakers: Francisco Presas\n\nAffiliation
: Instituto de Ciencias Matemáticas (ICMAT)\n\n
DTSTART:20210611T131500Z
DTEND:20210611T144500Z
LAST-MODIFIED:20210601T163523Z
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-75
END:VEVENT
BEGIN:VEVENT
UID:12c71510-1040-43d9-9e71-d25b67916412
DTSTAMP:20210622T223734Z
CREATED:20210611T154136Z
DESCRIPTION:Topic: Star Formation Histories from SEDs and CMDs Agree: Evide
nce for Synchronized Star Formation in Local Volume Dwarf Galaxies over th
e Past 3 Gyr\n\nSpeakers: Charlotte Olsen\n\nAffiliation: Rutgers Universi
ty\n\nEach week\, we hold a relatively informal seminar/discussion series
\nwith an emphasis on extra-galactic and large-scale structure\nastrophysi
cs.\n\nDuring Galread a leader/visitor presents a recent paper to the\ndis
cussion group. The PDF of the paper is projected onto a large\nscreen\, an
d a guest explains the paper\, section by section\, in greater\ndetail tha
n may be explained within the text of the article. To aid\nwith discussion
\, only the article PDF is presented -- no\npowerpoint-style slides. Galre
ad discussions are very friendly and\ninteractive.\n
DTSTART:20210614T150000Z
DTEND:20210614T160000Z
LAST-MODIFIED:20210611T154847Z
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-18
END:VEVENT
BEGIN:VEVENT
UID:02245c6c-ee34-4c06-ae4d-8c06a3ff827c
DTSTAMP:20210622T223734Z
CREATED:20210611T155251Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210614T160000Z
DTEND:20210614T170000Z
LAST-MODIFIED:20210611T155322Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-18
END:VEVENT
BEGIN:VEVENT
UID:2b3d63d1-54e2-48d3-b8e4-428d57da8e97
DTSTAMP:20210622T223734Z
CREATED:20210323T170157Z
DESCRIPTION:Topic: Local Dissipation of Energy for Continuous Incompressibl
e Euler Flows\n\nSpeakers: Phillip Isett\n\nAffiliation: University of Tex
as at Austin\, California Institute of Technology\n\nI will discuss the co
nstruction of continuous solutions to the\nincompressible Euler equations
that exhibit local dissipation of\nenergy and the surrounding motivations.
A significant open question\,\nwhich represents a strong form of the Onsa
ger conjecture\, is whether\nsuch solutions exist that locally dissipate e
nergy while having the\nmaximal possible regularity of being 1/3-Hölder co
ntinuous.\n
DTSTART:20210614T203000Z
DTEND:20210614T213000Z
LAST-MODIFIED:20210614T120316Z
LOCATION:Remote Access
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-153
END:VEVENT
BEGIN:VEVENT
UID:865537c7-c0d4-48eb-8c37-e78642975bdc
DTSTAMP:20210622T223734Z
CREATED:20210603T210750Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART:20210615T143000Z
DTEND:20210615T163000Z
LAST-MODIFIED:20210614T162719Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Reading Seminar
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-re
ading-seminar-0
END:VEVENT
BEGIN:VEVENT
UID:74a02fa6-47fa-431b-99ad-a5992b446a50
DTSTAMP:20210622T223734Z
CREATED:20210317T190129Z
DESCRIPTION:Topic: The Goddess Isis and the Kingdom of Meroe\n\nThe Institu
te for Advanced Study\, in partnership with Gorgias Press\,\nis delighted
to announce a new online lecture program\, The Author's\nVoice [/media/194
536]. The second lecture\, The Goddess Isis and the\nKingdom of Meroe [/me
dia/197491]\, will be given by SOLANGE ASHBY\,\nAdjunct Assistant Professo
r at Barnard College.\n\nDiscussions of the widespread appeal of the cult
of Isis in antiquity\noften omit any mention of the Nubian priests who ser
ved the rulers of\nthe Kingdom of Meroe (located south of Egypt in the Sud
an) and the\nroyal donations of gold that they delivered to the temple of
Isis at\nPhilae\, located at Egypt’s border with Nubia. Those funds were\n
essential to the survival of the temple of Philae\, allowing it to\nremain
in active use for centuries after other temples had been\nabandoned in Eg
ypt. I will describe the rites performed by the Nubian\npriests and their
participation in a tradition of Nubian pilgrimage to\nthis site that spann
ed one thousand years.\n\nAs a Black Egyptologist it is important to me to
investigate the\nsouthern connections that are evident in the ancient rel
igious\npractices of Egypt. Much work remains to be done to highlight thes
e\nconnections.\n\nThis is a free Zoom lecture. REGISTER IN ADVANCE HERE\n
[https://theias.zoom.us/meeting/register/tZIvduurrzIsE921GWWCJfdcrQZAZt5Td
9lS]. After\nregistering\, you will receive a confirmation email containin
g\ninformation about joining the event.\n\nHosted by Sabine Schmidtke (Sch
ool of Historical Studies\, IAS) and\nGeorge A. Kiraz (School of Historica
l Studies\, IAS and\nEditor-in-Chief\, Gorgias Press) in cooperation with
Angelos Chaniotis\n(School of Historical Studies\, IAS).\n\nFor more infor
mation\, please contact ds@ias.edu.\n\n \n
DTSTART:20210617T160000Z
DTEND:20210617T160000Z
LAST-MODIFIED:20210603T200616Z
LOCATION:Online
SUMMARY:The Author's Voice
URL:https://www.ias.edu/hs/events/authors-voice-0
END:VEVENT
BEGIN:VEVENT
UID:d1e7ac1c-578c-4f75-8c46-6f4a97bb7017
DTSTAMP:20210622T223734Z
CREATED:20210405T150552Z
DESCRIPTION:Topic: On the spatial restricted three-body problem\n\nSpeakers
: Agustin Moreno\n\nAffiliation: Uppsala University\n\nIn his search for c
losed orbits in the planar restricted three-body\nproblem\, Poincaré’s app
roach roughly reduces to:\n\n * Finding a global surface of section\;\n *
Proving a fixed-point theorem for the resulting return map.\n\nThis is the
setting for the celebrated Poincaré-Birkhoff theorem. In\nthis talk\, I w
ill discuss a generalization of this program to the\nspatial problem.\n\nF
or the first step\, we obtain the existence of global hypersurfaces of\nse
ction for which the return maps are Hamiltonian\, valid for energies\nbelo
w the first critical value and all mass ratios. For the second\, we\nprove
a higher-dimensional version of the Poincaré-Birkhoff theorem\,\nwhich gi
ves infinitely many orbits of arbitrary large period\, provided\na suitabl
e twist condition is satisfied. Time permitting\, we also\ndiscuss a const
ruction that associates a Reeb dynamics on a moduli\nspace of holomorphic
curves (a copy of the three-sphere)\, to the given\ndynamics\, and its pro
perties.\n\nThis is based on joint work with Otto van Koert.\n
DTSTART:20210618T131500Z
DTEND:20210618T144500Z
LAST-MODIFIED:20210601T152705Z
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-76
END:VEVENT
BEGIN:VEVENT
UID:0f473d2a-fd37-4e22-acc1-420a28acd54a
DTSTAMP:20210622T223734Z
CREATED:20210611T154259Z
DESCRIPTION:Topic: Insights into star formation conditions from spatially-r
esolved ISM properties in TNG50\n\nSpeakers: Bhawna Motwani\n\nAffiliation
: Columbia University\n\nEach week\, we hold a relatively informal seminar
/discussion series\nwith an emphasis on extra-galactic and large-scale str
ucture\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 g
reater\ndetail than may be explained within the text of the article. To ai
d\nwith discussion\, only the article PDF is presented -- no\npowerpoint-s
tyle slides. Galread discussions are very friendly and\ninteractive.\n
DTSTART:20210621T150000Z
DTEND:20210621T160000Z
LAST-MODIFIED:20210618T232421Z
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-19
END:VEVENT
BEGIN:VEVENT
UID:13e06ab7-ad68-4d4e-a894-76a5706d1d9a
DTSTAMP:20210622T223734Z
CREATED:20210611T155335Z
DESCRIPTION:Topic: Circumbinary Planets and Stellar Multiples from TESS\n\n
Speakers: Veselin Kostov\n\nAffiliation: Goddard Space Flight Center\n\nEc
lipsing binary stars exhibiting additional transit- or eclipse-like\nfeatu
res provide an excellent opportunity to study the multiplicity of\nthe sys
tem\, detect circumbinary planets\, and measure the orbital and\nphysical
parameters of its constituents with exquisite precision.\nSpace-based phot
ometric surveys are well-suited to provide such\nobservations\, as demonst
rated by the highly-successful Kepler mission\nwhich detected a number of
higher-order stellar systems\, as well as a\nhandful of transiting circumb
inary planets Thanks to its large sky\ncoverage and long dwell-time\, the
TESS mission is equally capable of\ndiscovering such systems. Here I will
present our recent TESS\ndiscoveries of transiting circumbinary planets as
well as of eclipsing\ntriple\, quadruple and sextuple stars\, highlight t
he detection and\nanalysis process of these systems\, and discuss their as
trophysical\ncontext.\n
DTSTART:20210621T160000Z
DTEND:20210621T170000Z
LAST-MODIFIED:20210617T105123Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-20
END:VEVENT
BEGIN:VEVENT
UID:d78a21c0-8223-4282-8735-bbf122550de0
DTSTAMP:20210622T223734Z
CREATED:20210603T210807Z
DESCRIPTION:Topic: Tensor Rank\n\nSpeakers: Avi Wigderson\n\nAffiliation: I
AS\, Herbert H. Maass Professor\, School of Mathematics\n\nTensors occur t
hroughout mathematics. Their rank\, defined in analogy\nwith matrix rank\,
is however much more poorly understood\, both from a\nstructural and algo
rithmic viewpoints.\n\nThis will be an introductory talk to some of the ba
sic issues\nfrustrating us with the understanding of tensor rank. I will d
efine\nthe rank of tensors (and a few asymptotic variants). I will discuss
\nbasic results on the complexity of computing the rank of a given\ntensor
\, in the general and some special cases. I will then turn to\nshow the fe
w\, weak lower bounds we have for explicit tensors\, and\ndiscuss barrier
results explaining why better lower bounds cannot be\nobtained using the b
est techniques currently available in algebraic\ngeometry and algebraic co
mplexity theory.\n
DTSTART:20210622T143000Z
DTEND:20210622T163000Z
LAST-MODIFIED:20210622T191527Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Reading Seminar
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-re
ading-seminar-1
END:VEVENT
BEGIN:VEVENT
UID:9322786c-12e9-41a1-ba8e-4ba8a2fb32a6
DTSTAMP:20210622T223734Z
CREATED:20210617T110012Z
DESCRIPTION:Topic: The Dark Energy Survey Year 3 Results from Weak Lensing
and Clustering\n\nSpeakers: Alexandra Amon\n\nAffiliation: Kavli Institute
for Particle Astrophysics and Cosmology at Stanford\n\nI will present the
cosmological weak lensing and clustering results\nfrom the Dark Energy Su
rvey (DES) using its first three years of data\ntaken using the Dark Energ
y Camera on the 4m Blanco telescope at CTIO.\nThis analysis spans the full
DES footprint\, more than 4000 sq. deg. of\nsky\, with the final shear ca
talogue containing more than 100 million\ngalaxies\, constituting the most
powerful weak lensing dataset to date.\nThe comparison of DES cosmologica
l constraints from these probes in\nthe low-redshift Universe to CMB const
raints provides an unprecedented\ntest of the standard cosmological model\
, across cosmic time. We find\nthese DES results are consistent with those
from the cosmic microwave\nbackground (CMB) and support the standard cosm
ological model\, LCDM. I\nwill mention the main challenges that our analys
is is susceptible to\,\nand then summarise the DES-Year 3 approach to acco
unt for these and\ndeliver robust cosmological constraints.\n
DTSTART:20210623T180000Z
DTEND:20210623T190000Z
LAST-MODIFIED:20210617T110725Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Special Talk on Dark Energy Survey Year 3
URL:https://www.ias.edu/sns/events/princeton-university-special-talk-dark-e
nergy-survey-year-3
END:VEVENT
BEGIN:VEVENT
UID:a13a47a3-3266-430a-bb9a-cb0bda5e881b
DTSTAMP:20210622T223734Z
CREATED:20210405T150607Z
DESCRIPTION:Topic: Three 20 minute research talks\n\nSpeakers: Mohan Swamin
athan\, Ben Wormleighton\, Jonathan Zung\n\nAffiliation: Princeton Univers
ity\; Washington University\; Princeton University\n\nMOHAN SWAMINATHAN (P
RINCETON)\, _Super-rigidity and bifurcations of\nembedded curves in Calabi
-Yau 3-folds_\n\nI will describe my recent work\, joint with Shaoyun Bai\,
which studies\na class of bifurcations of moduli spaces of embedded\npseu
do-holomorphic curves in symplectic Calabi-Yau 3-folds and their\nassociat
ed obstruction bundles. As an application\, we are able to give\na direct
definition of the Gopakumar-Vafa invariant in a special case.\n\nBEN WORML
EIGHTON (WASHINGTON UNIVERSITY)\, _Lattice formulas for\nrational SFT capa
cities of toric domains_\n\nSiegel has recently defined ‘higher’ symplecti
c capacities using\nrational SFT that obstruct symplectic embeddings and b
ehave well with\nrespect to stabilisation. I will report on joint work wit
h Julian\nChaidez that relates these capacities to algebro-geometric invar
iants\,\nwhich leads to computable\, combinatorial formulas for many conve
x\ntoric domains.\n\nJONATHAN ZUNG (PRINCETON)\, _Reeb flows transverse to
foliations_\n\nEliashberg and Thurston showed that taut foliations on 3-m
anifolds can\nbe approximated by tight contact structures. I will explain
a new\napproach to this theorem which allows one to control the resulting
\nReeb flow and hence produce many hypertight contact structures. Along\nt
he way\, I will explain how harmonic transverse measures may be used\nto u
nderstand the holonomy of foliations.\n
DTSTART:20210625T131500Z
DTEND:20210625T144500Z
LAST-MODIFIED:20210618T175622Z
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-77
END:VEVENT
BEGIN:VEVENT
UID:7122b44d-e6c2-4a89-94ba-523e5f56a668
DTSTAMP:20210622T223734Z
CREATED:20210611T155421Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210628T160000Z
DTEND:20210628T170000Z
LAST-MODIFIED:20210611T155438Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-21
END:VEVENT
BEGIN:VEVENT
UID:ee456fb9-c8c2-49d4-9c7f-a89ab14fa2c8
DTSTAMP:20210622T223734Z
CREATED:20210603T210822Z
DESCRIPTION:
DTSTART:20210629T143000Z
DTEND:20210629T163000Z
LAST-MODIFIED:20210603T210831Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Reading Seminar
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-re
ading-seminar-2
END:VEVENT
BEGIN:VEVENT
UID:381bf024-72cf-4895-863c-4a58372dc64e
DTSTAMP:20210622T223734Z
CREATED:20210405T150622Z
DESCRIPTION:Topic: Symplectically knotted cubes\n\nSpeakers: Felix Schlenk
\n\nAffiliation: Université de Neuchâtel\n\nWhile by a result of McDuff th
e space of symplectic embeddings of a\nclosed 4-ball into an open 4-ball i
s connected\, the situation for\nembeddings of cubes $C^4 = D^2 \times D^2
$ is very different. For\ninstance\, for the open ball $B^4$ of capacity 1
\, there exists an\nexplicit decreasing sequence $c_1\, c_2\, \dotsc \to 1
/3$ such that for\n$c < c_k$ there are at least $k$ symplectic embeddings
of the closed\ncube $C^4(c)$ of capacity $c$ into $B^4$ that are not isoto
pic.\nFurthermore\, there are infinitely many non-isotopic symplectic\nemb
eddings of $C^4(1/3)$ into $B^4$.\n\nA similar result holds for several ot
her targets\, like the open\n4-cube\, the complex projective plane\, the p
roduct of two equal\n2-spheres\, or a monotone product of such manifolds a
nd any closed\nmonotone toric symplectic manifold.\n\nThe proof uses exoti
c Lagrangian tori.\n\nThis is joint work with Joé Brendel and Grisha Mikha
lkin.\n
DTSTART:20210702T131500Z
DTEND:20210702T144500Z
LAST-MODIFIED:20210622T213620Z
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-78
END:VEVENT
BEGIN:VEVENT
UID:e4421eab-2f65-40e4-b297-dd7ac539adff
DTSTAMP:20210622T223734Z
CREATED:20210603T210840Z
DESCRIPTION:
DTSTART:20210706T143000Z
DTEND:20210706T163000Z
LAST-MODIFIED:20210603T210848Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Reading Seminar
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-re
ading-seminar-3
END:VEVENT
BEGIN:VEVENT
UID:ece8bddb-2e36-4b19-a172-ad0be2a8db7c
DTSTAMP:20210622T223734Z
CREATED:20210405T150637Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Laurent Côté\n\n
DTSTART:20210709T131500Z
DTEND:20210709T144500Z
LAST-MODIFIED:20210521T192501Z
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-79
END:VEVENT
BEGIN:VEVENT
UID:2be7355f-4a48-4ff2-9313-f07fae82f4a3
DTSTAMP:20210622T223734Z
CREATED:20210611T154408Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Adrian Price-Whelan\n\nAffiliation: Fla
tiron Institute\n\nEach week\, we hold a relatively informal seminar/discu
ssion 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:20210712T150000Z
DTEND:20210712T160000Z
LAST-MODIFIED:20210611T154511Z
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-20
END:VEVENT
BEGIN:VEVENT
UID:96ce3c85-7e38-484e-b478-4545ef7093f6
DTSTAMP:20210622T223734Z
CREATED:20210611T155450Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210712T160000Z
DTEND:20210712T170000Z
LAST-MODIFIED:20210611T155516Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-22
END:VEVENT
BEGIN:VEVENT
UID:7f11343a-0ea4-44d5-9b26-f63abc911969
DTSTAMP:20210622T223734Z
CREATED:20210603T210855Z
DESCRIPTION:
DTSTART:20210713T143000Z
DTEND:20210713T163000Z
LAST-MODIFIED:20210603T210903Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Reading Seminar
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-re
ading-seminar-4
END:VEVENT
BEGIN:VEVENT
UID:f5fb7639-3747-4dcd-ab96-e53c35147d2c
DTSTAMP:20210622T223734Z
CREATED:20210611T160109Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210713T233000Z
DTEND:20210714T013000Z
LAST-MODIFIED:20210611T160155Z
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-6
END:VEVENT
BEGIN:VEVENT
UID:f888a96c-cde3-4831-b927-cb4816e31de9
DTSTAMP:20210622T223734Z
CREATED:20210611T160206Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210713T233000Z
DTEND:20210714T013000Z
LAST-MODIFIED:20210611T160216Z
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-7
END:VEVENT
BEGIN:VEVENT
UID:e2379706-4c0f-4031-b273-4112828f5410
DTSTAMP:20210622T223734Z
CREATED:20210405T150652Z
DESCRIPTION:Topic: The Floer Jungle: 35 years of Floer Theory\n\nSpeakers:
Helmut Hofer\n\n
DTSTART:20210716T131500Z
DTEND:20210716T144500Z
LAST-MODIFIED:20210521T192524Z
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-80
END:VEVENT
BEGIN:VEVENT
UID:9efc0f22-e50a-4fc5-80a2-a92d234fc7e5
DTSTAMP:20210622T223734Z
CREATED:20210611T155541Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210719T160000Z
DTEND:20210719T170000Z
LAST-MODIFIED:20210611T155603Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-23
END:VEVENT
BEGIN:VEVENT
UID:fa16ad81-f3d5-4e3d-adb5-c3a3c974dd37
DTSTAMP:20210622T223734Z
CREATED:20210603T210910Z
DESCRIPTION:
DTSTART:20210720T143000Z
DTEND:20210720T163000Z
LAST-MODIFIED:20210603T210919Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Reading Seminar
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-re
ading-seminar-5
END:VEVENT
BEGIN:VEVENT
UID:8b09f47c-618f-4905-ad41-abfea146b7d0
DTSTAMP:20210622T223734Z
CREATED:20210611T155617Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20210726T160000Z
DTEND:20210726T170000Z
LAST-MODIFIED:20210611T155636Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-24
END:VEVENT
BEGIN:VEVENT
UID:debc7768-97b3-43f3-bce5-ec1c3be6ab6c
DTSTAMP:20210622T223734Z
CREATED:20210603T210926Z
DESCRIPTION:
DTSTART:20210727T143000Z
DTEND:20210727T163000Z
LAST-MODIFIED:20210603T210934Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Reading Seminar
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-re
ading-seminar-6
END:VEVENT
BEGIN:VEVENT
UID:6fb3ac42-9db0-417e-9869-52eee1808c3d
DTSTAMP:20210622T223734Z
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:d165e5f1-f41a-44e9-b86e-3552221ba3fc
DTSTAMP:20210622T223734Z
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:f5f3fe1c-59a6-41e6-bf77-c542cd8ab8e6
DTSTAMP:20210622T223734Z
CREATED:20210317T191604Z
DESCRIPTION:Topic: Sasanian Iran: A Personal View\n\nThe Institute for Adva
nced Study\, in partnership with Gorgias Press\,\nis delighted to announce
a new online lecture program\, The Author's\nVoice [/media/194536].\n\nTh
e third lecture will be given by MICHAEL R. JACKSON BONNER\, Canadian\nwri
ter\, political adviser and independent historian of Iran.\n\nThis is a fr
ee Zoom lecture. REGISTER IN ADVANCE HERE\n[https://theias.zoom.us/meeting
/register/tZIsdeCgrjsrG9fCxvl1HFNd800LhgODDQSM ]. After\nregistering\, you
will receive a confirmation email containing\ninformation about joining t
he event.\n\nHosted by Sabine Schmidtke (School of Historical Studies\, IA
S) and\nGeorge A. Kiraz (School of Historical Studies\, IAS and\nEditor-in
-Chief\, Gorgias Press) in cooperation with Angelos Chaniotis\n(School of
Historical Studies\, IAS).\n\nFor more information\, please contact ds@ias
.edu.\n
DTSTART:20210916T160000Z
DTEND:20210916T160000Z
LAST-MODIFIED:20210325T152514Z
LOCATION:Online
SUMMARY:The Author's Voice
URL:https://www.ias.edu/hs/events/authors-voice-1
END:VEVENT
BEGIN:VEVENT
UID:11e8e033-f383-4dde-8f28-4c554af4e31c
DTSTAMP:20210622T223734Z
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:d216e0e2-4e76-4f97-b9bd-9f34473d463c
DTSTAMP:20210622T223734Z
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:4417d520-915b-46aa-aa81-96c70bf2f19b
DTSTAMP:20210622T223734Z
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:6bedb42f-d273-4562-8289-a48ae0f039f8
DTSTAMP:20210622T223734Z
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:83bdb52b-3ec5-49a2-8789-57b092e7c870
DTSTAMP:20210622T223734Z
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:00ec213c-1535-481f-ac80-1f80aedc3f18
DTSTAMP:20210622T223734Z
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:11967efc-9565-43bd-a0ef-74ec3fc89bf6
DTSTAMP:20210622T223734Z
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:1f8256d3-b47f-41ef-869e-3e978dfedb86
DTSTAMP:20210622T223734Z
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:9d31295b-ff16-4c54-a541-4fc146658f49
DTSTAMP:20210622T223734Z
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:b2b76fba-39af-408b-b9e2-6554c73eaeb3
DTSTAMP:20210622T223734Z
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:95426d66-3ac4-47c8-8c43-d22c37c93617
DTSTAMP:20210622T223734Z
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:8bac1b03-cf10-4723-ac76-55a6e33579de
DTSTAMP:20210622T223734Z
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:2587387d-d9cf-4c60-86c7-f65ac737d5ce
DTSTAMP:20210622T223734Z
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:7c90de51-9d0a-4d4d-a138-fb333ea90ae8
DTSTAMP:20210622T223734Z
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:a73745ac-4269-4834-b507-1eb3e3ca1195
DTSTAMP:20210622T223734Z
CREATED:20210317T191930Z
DESCRIPTION:Topic: Ash'arism Encounters Avicennism: Sayf Al-Dīn Al-Āmidī (d
. 631/1233) on Creation\n\nThe Institute for Advanced Study\, in partnersh
ip with Gorgias Press\,\nis delighted to announce a new online lecture pro
gram\, The Author's\nVoice\n[https://www.ias.edu/sites/default/files/The%2
0Author%27s%20Voice%202021%20Program.pdf].\n\nThe fourth and final lecture
will be given by Laura Hassan\, Associate\nFaculty Member\, Faculty of Or
iental Studies\, University of Oxford.\n\nThis is a free Zoom lecture. REG
ISTER IN ADVANCE HERE\n[https://theias.zoom.us/meeting/register/tZcqdeuoqD
4jH9yIPZT82QtKrdqmlYN-7Cb6 ]. After\nregistering\, you will receive a conf
irmation email containing\ninformation about joining the event.\n\nHosted
by Sabine Schmidtke (School of Historical Studies\, IAS) and\nGeorge A. Ki
raz (School of Historical Studies\, IAS and\nEditor-in-Chief\, Gorgias Pre
ss) in cooperation with Angelos Chaniotis\n(School of Historical Studies\,
IAS).\n\nFor more information\, please contact ds@ias.edu.\n
DTSTART:20211209T170000Z
DTEND:20211209T170000Z
LAST-MODIFIED:20210325T152711Z
LOCATION:Online
SUMMARY:The Author's Voice
URL:https://www.ias.edu/hs/events/authors-voice-2
END:VEVENT
BEGIN:VEVENT
UID:a928e08d-6bbb-44dd-a4de-b08980019b94
DTSTAMP:20210622T223734Z
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:e9c0e829-fcdf-4cdb-9893-9f3587eb53b3
DTSTAMP:20210622T223734Z
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
BEGIN:VEVENT
UID:c13f563c-1cca-43b7-b0f1-370749ff75b4
DTSTAMP:20210622T223734Z
CREATED:20200110T181550Z
DESCRIPTION:
DTSTART:20220408T220000Z
DTEND:20220408T220000Z
LAST-MODIFIED:20210104T025926Z
LOCATION:
SUMMARY:IAS School of Mathematics Term II Ends
URL:https://www.ias.edu/math/events/ias-school-mathematics-term-ii-ends-0
END:VEVENT
END:VCALENDAR