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CALSCALE:GREGORIAN
UID:11642e3e-7672-4b5d-9a2c-faf75debe734
X-WR-TIMEZONE:UTC
X-WR-CALNAME:IAS Academic
BEGIN:VEVENT
UID:276ca9dc-477c-4b2a-82d6-ea85e564395a
DTSTAMP:20201203T104600Z
CREATED:20200831T213212Z
DESCRIPTION:Topic: Hamiltonian classification and unlinkedness of fibres in
cotangent bundles of Riemann surfaces\n\nSpeakers: Georgios Dimitroglou R
izell\n\nAffiliation: Uppsala University\n\nIn a joint work with Laurent C
ôté we show the following result. Any\nLagrangian plane in the cotangent b
undle of an open Riemann surface\nwhich coincides with a cotangent fibre o
utside of some compact subset\,\nis compactly supported Hamiltonian isotop
ic to that fibre. This result\nimplies Hamiltonian unlinkedness for Lagran
gian links in the cotangent\nbundle of a (possibly closed Riemann surface
whose components are\nHamiltonian isotopic to fibres.\n
DTSTART;TZID=America/New_York:20200904T091500
DTEND;TZID=America/New_York:20200904T104500
LAST-MODIFIED:20201012T214018Z
LOCATION:Remote Access Only
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-9
END:VEVENT
BEGIN:VEVENT
UID:1ae24d10-8936-4b75-ac70-b87ac88c3342
DTSTAMP:20201203T104600Z
CREATED:20200828T010647Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART;TZID=America/New_York:20200904T150000
DTEND;TZID=America/New_York:20200904T160000
LAST-MODIFIED:20200828T010647Z
LOCATION:Remote Event
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/events/princeton-university-hsc-group-discussion-14
9
END:VEVENT
BEGIN:VEVENT
UID:bab65f5d-8cc4-4d45-bab4-f2ab37e6b2c2
DTSTAMP:20201203T104600Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20200908T123000
DTEND;TZID=America/New_York:20200908T133000
LAST-MODIFIED:20200904T010828Z
LOCATION:Virtual
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-93
END:VEVENT
BEGIN:VEVENT
UID:682990d3-f98e-47b7-8c05-6be0e104e5f2
DTSTAMP:20201203T104600Z
CREATED:20200904T193333Z
DESCRIPTION:Topic: Broué’s Abelian Defect Group Conjecture I\n\nSpeakers: J
ay Taylor\n\nAffiliation: University of Southern California\; Member\, Sch
ool of Mathematics\n\nVideo: Remote Access Only\n\nThis talk will form par
t of a series of three talks focusing on\nBroué’s Abelian Defect Group Con
jecture\, which concerns the modular\nrepresentation theory of finite grou
ps. We will pay particular\nattention here to the ‘geometric’ form of the
conjecture which\nconcerns finite reductive groups such as $GL_n(q)$ and $
SL_n(q)$.\nBroué’s conjecture gives a strong structural reason for many\nn
umerical coincidences one sees amongst characters and is part of a\ngenera
l ‘local/global phenomena’ that is abundant in the theory.\nIn this first
talk we will briefly recall the necessary background\nmaterial\, get to th
e point where we can state the conjecture\, and\ndiscuss some important ex
amples.\n
DTSTART;TZID=America/New_York:20200909T150000
DTEND;TZID=America/New_York:20200909T170000
LAST-MODIFIED:20201030T014810Z
LOCATION:Remote Access Only
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory
END:VEVENT
BEGIN:VEVENT
UID:d4433e31-1c1a-49e5-a5b6-0d9a92554ee6
DTSTAMP:20201203T104600Z
CREATED:20200708T174414Z
DESCRIPTION:Topic: Physics and Astrophysics With Gravitational-Wave Observa
tions of Black Hole Binaries\n\nSpeakers: Emanuele Berti\n\nAffiliation: J
ohns Hopkins University\n\nThe observation of compact binary mergers by th
e LIGO/Virgo\ncollaboration marked the dawn of a new era in astronomy. LIS
A will\nexpand this vision by opening a new observational window at low\nf
requencies. The gravitational radiation emitted by compact binary\nsystems
in these two frequency windows encodes important information\non their as
trophysical formation mechanism. Furthermore\, compact\nobjects - whether
in isolation or in binaries - are excellent\nastrophysical laboratories to
probe our understanding of high-energy\nphysics and strong-field gravity.
I will highlight the potential of\nEarth- and space-based detectors to fu
rther our understanding of the\nformation and evolution of compact binarie
s. I will also discuss\npotential smoking guns of new physics in gravitati
onal-wave detectors\,\nand the theoretical and observational challenges as
sociated with their\nsearch.\n
DTSTART;TZID=America/New_York:20200910T110000
DTEND;TZID=America/New_York:20200910T120000
LAST-MODIFIED:20201201T200407Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/events/institute-advanced-study-astrophysics-semina
r-272
END:VEVENT
BEGIN:VEVENT
UID:e3e2615b-c074-4615-822c-8c62735d0f4a
DTSTAMP:20201203T104600Z
CREATED:20200909T130856Z
DESCRIPTION:Topic: HathiTrust Research Center Tools and Services\n\nSpeaker
s: Ryan Dubnicek\n\nAffiliation: HathiTrust Research Center\n\nThis webina
r will introduce attendees to the HathiTrust Research\nCenter’s tools and
services for utilizing the massive HathiTrust\nDigital Library for computa
tional text analysis. The HTRC leverages\nthe scope and scale of the Hathi
Trust corpus to allow researchers the\nopportunity to perform text data mi
ning.\n\nRegister in advance:\nhttps://rutgers.zoom.us/meeting/register/tJ
wsfuutqj4qGdV8ZCE1eiEv8DRCHm8amw6D\n\nAfter registering\, you will receive
a confirmation email containing\ninformation about joining the meeting.\n
\n
DTSTART;TZID=America/New_York:20200910T140000
DTEND;TZID=America/New_York:20200910T140000
LAST-MODIFIED:20200909T130935Z
LOCATION:
SUMMARY:Digital Scholarship @IAS
URL:https://www.ias.edu/events/digital-scholarship-ias
END:VEVENT
BEGIN:VEVENT
UID:6b33e30d-199b-4300-ab3d-e29625cb3fd5
DTSTAMP:20201203T104600Z
CREATED:20200831T222343Z
DESCRIPTION:Topic: An asymptotic version of the prime power conjecture for
perfect difference sets\n\nSpeakers: Sarah Peluse\n\nAffiliation: Institu
te for Advanced Study and Princeton University\; Veblen Research Instructo
r\, School of Mathematics\n\nVideo: Simonyi 101 and Remote Access\n\nA sub
set $D$ of a finite cyclic group $Z/mZ$ is called a 'perfect\ndifference s
et' if every nonzero element of $Z/mZ$ can be written\nuniquely as the dif
ference of two elements of $D$. If such a set\nexists\, then a simple coun
ting argument shows that $m=n^2+n+1$ for\nsome nonnegative integer $n$. Si
nger constructed examples of perfect\ndifference sets in $Z/(n^2+n+1)Z$ wh
enever $n$ is a prime power\, and\nit is an old conjecture that these are
the only such n for which a\nperfect difference set exists. In this talk\,
I will discuss a proof of\nan asymptotic version of this conjecture: the
number of $n$ less than\n$N$ for which $Z/(n^2+n+1)Z$ contains a perfect d
ifference set is\n$\sim N/\log(N)$.
DTSTART;TZID=America/New_York:20200910T163000
DTEND;TZID=America/New_York:20200910T173000
LAST-MODIFIED:20200911T225308Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-230
END:VEVENT
BEGIN:VEVENT
UID:5bb712c7-3fbb-4b76-b2ed-4096697d9b6f
DTSTAMP:20201203T104600Z
CREATED:20200831T221530Z
DESCRIPTION:Topic: Reeb dynamics in dimension 3 and broken book decompositi
ons\n\nSpeakers: Vincent Colin\n\nAffiliation: Université de Nantes\n\nVi
deo: Remote Access Only\n\nIn a joint work with Pierre Dehornoy and Ana Re
chtman\, we prove that\non a closed 3-manifold\, every nondegenerate Reeb
vector field is\nsupported by a broken book decomposition. From this prope
rty\, we\ndeduce that in dimension 3 every nondegenerate Reeb vector field
has\neither 2 or infinitely periodic orbits and that on a closed 3-manifo
ld\nthat is not graphed\, every nondegenerate Reeb vector field has\nposit
ive topological entropy.\n
DTSTART;TZID=America/New_York:20200911T091500
DTEND;TZID=America/New_York:20200911T104500
LAST-MODIFIED:20201012T214025Z
LOCATION:Remote Access Only
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-10
END:VEVENT
BEGIN:VEVENT
UID:4c988977-9313-4c33-9806-a1ca597d215b
DTSTAMP:20201203T104600Z
CREATED:20200828T030141Z
DESCRIPTION:Topic: CLEAR II: Evidence for Early Formation of the Most Compa
ct Quiescent Galaxies at High Redshift\n\nSpeakers: Discussion Leader: Vic
ente Estrada-Carpenter \n\nAffiliation: Texas A&M University\n\nEach week\
, we hold a relatively informal seminar/discussion series\nwith an emphasi
s on extra-galactic and large-scale structure\nastrophysics.\n\nDuring Gal
read a leader/visitor presents a recent paper to the\ndiscussion group. Th
e PDF of the paper is projected onto a large\nscreen\, and a guest explain
s the paper\, section by section\, in greater\ndetail than may be explaine
d within the text of the article. To aid\nwith discussion\, only the artic
le PDF is presented -- no\npowerpoint-style slides. Galread discussions ar
e very friendly and\ninteractive.\n
DTSTART;TZID=America/New_York:20200914T110000
DTEND;TZID=America/New_York:20200914T120000
LAST-MODIFIED:20200909T155743Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-28
END:VEVENT
BEGIN:VEVENT
UID:2e98f89f-a936-43eb-8eea-355a0914ed33
DTSTAMP:20201203T104600Z
CREATED:20200910T192337Z
DESCRIPTION:Topic: Nature vs. nurture: a Bayesian framework for assessing a
pparent correlations between planetary orbital properties and stellar ages
\n\nSpeakers: Rebekah Dawson\n\nAffiliation: Pennsylvania State University
\n\nMany exoplanets have orbital characteristics quite different from\ntho
se seen in our own solar system\, including planets locked in\norbital res
onances and planets on orbits that are elliptical or highly\ninclined from
their host star's spin axis. It is debated whether the\nwide variety in s
ystem architecture is primarily due to differences in\nformation condition
s (nature) or due to evolution over time (nurture).\nIdentifying trends be
tween planetary and stellar properties\, including\nstellar age\, can help
distinguish between these competing theories and\noffer insights as to ho
w planets form and evolve. However\, it can be\nchallenging to determine w
hether observed trends between planetary\nproperties and stellar age are d
riven by the age of the system --\npointing to evolution over time being a
n important factor -- or other\nparameters to which the age may be related
\, such as stellar mass or\nstellar temperature. The situation is complica
ted further by the\npossibilities of selection biases\, small number stati
stics\,\nuncertainties in stellar age\, and orbital evolution timescales t
hat\nare typically much shorter than the range of observed ages. Here we\n
develop a Bayesian statistical framework to assess the robustness of\nsuch
observed correlations and to determine whether they are indeed\ndue to ev
olutionary processes\, are more likely to reflect different\nformation sce
narios\, or are merely coincidental. We apply this\nframework to reported
trends between stellar age and 2:1 orbital\nresonances\, spin-orbit misali
gnments\, and hot Jupiters' orbital\neccentricities. We find strong suppor
t for the nurture hypothesis only\nin the final case.\n
DTSTART;TZID=America/New_York:20200914T121500
DTEND;TZID=America/New_York:20200914T131500
LAST-MODIFIED:20200910T192337Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/events/princeton-university-exoplanet-discussion-gr
oup-48
END:VEVENT
BEGIN:VEVENT
UID:8204754c-79e7-46d2-ad87-669abe35ff81
DTSTAMP:20201203T104600Z
CREATED:20200828T040107Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART;TZID=America/New_York:20200914T123000
DTEND;TZID=America/New_York:20200914T140000
LAST-MODIFIED:20200911T141452Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-15
END:VEVENT
BEGIN:VEVENT
UID:785745f0-a4f7-4f57-a605-3c7852a00475
DTSTAMP:20201203T104600Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20200915T123000
DTEND;TZID=America/New_York:20200915T133000
LAST-MODIFIED:20200910T162907Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-131
END:VEVENT
BEGIN:VEVENT
UID:d6ed2eff-ed2a-4aeb-849b-b7200659e26d
DTSTAMP:20201203T104600Z
CREATED:20200910T154025Z
DESCRIPTION:Topic: Broué’s Abelian Defect Group Conjecture II\n\nSpeakers:
Daniel Juteau\n\nAffiliation: Centre National de la Recherche Scientifique
/Université Paris Diderot\; Member\, School of Mathematics\n\nVideo: Remot
e Access Only\n\nIn this second talk about Broué’s Abelian Defect Group Co
njecture\,\nwe will explain its geometric version in the case of finite gr
oups of\nLie type: the equivalence should be induced by the cohomology com
plex\nof Deligne-Lusztig varieties. This was actually the main motivation
\nfor the conjecture in the first place. We will illustrate those ideas\nw
ith the case of $SL(2\,q)$.\n
DTSTART;TZID=America/New_York:20200916T150000
DTEND;TZID=America/New_York:20200916T170000
LAST-MODIFIED:20201030T014834Z
LOCATION:Remote Access Only
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory-1
END:VEVENT
BEGIN:VEVENT
UID:e35087ff-9165-45ed-83c9-1d71c437291b
DTSTAMP:20201203T104600Z
CREATED:20200828T013052Z
DESCRIPTION:Topic: Turbulent power-law spectra in the universe\n\nSpeakers:
Siyao Xu\n\nAffiliation: Member\, School of Natural Sciences\n\nTurbulenc
e is ubiquitous in astrophysical media and plays an essential\nrole in a v
ariety of fundamental astrophysical processes. The\nturbulent power-law sp
ectra have been observed in the solar wind\, the\ninterstellar medium\, th
e intracluster medium\, over a vast range of\nlength scales. In our Galaxy
\, I will discuss pulsars as a unique tool\nfor statistically studying the
turbulence in the multi-phase\ninterstellar medium over different ranges
of length scales. For the\nintergalactic medium\, I will introduce fast ra
dio bursts (FRBs) as new\ntracers to probe the intergalactic turbulence on
very large scales.\nThe observations of FRBs hold the valuable informatio
n of the\nlarge-scale intergalactic turbulence\, which has not been explor
ed\nbefore.\n
DTSTART;TZID=America/New_York:20200917T110000
DTEND;TZID=America/New_York:20200917T120000
LAST-MODIFIED:20201201T200407Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/events/institute-advanced-study-astrophysics-semina
r-286
END:VEVENT
BEGIN:VEVENT
UID:f44e5e63-ad76-446c-bd20-97a307e4c634
DTSTAMP:20201203T104600Z
CREATED:20200901T212257Z
DESCRIPTION:Topic: Equivariant localization\, parity sheaves\, and cyclic b
ase change\n\nSpeakers: Tony Feng\n\nAffiliation: Member\, School of Mathe
matics\n\nLafforgue and Genestier-Lafforgue have constructed the global an
d\n(semisimpliﬁed) local Langlands correspondences for arbitrary\nreductiv
e groups over function ﬁelds. I will explain some recently\nestablished pr
operties of these correspondences regarding base change\nfunctoriality: ex
istence of transfers for mod p automorphic forms\nthrough p-cyclic base ch
ange in the global correspondence\, and Tate\ncohomology realizes p-cyclic
base change in the mod p local\ncorrespondence. The proofs are based on a
combination of equivariant\nlocalization arguments (inspired by work of T
reumann-Venkatesh) and\nthe theory of parity sheaves (due to Juteau-Mautne
r-Williamson).\n
DTSTART;TZID=America/New_York:20200917T140000
DTEND;TZID=America/New_York:20200917T150000
LAST-MODIFIED:20200911T141321Z
LOCATION:Remote Access Only
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-231
END:VEVENT
BEGIN:VEVENT
UID:8f133b2b-2323-4d0b-ae17-abc05c083d57
DTSTAMP:20201203T104600Z
CREATED:20200901T215217Z
DESCRIPTION:Topic: Fukaya category for Landau-Ginzburg orbifolds and Berglu
nd-Hübsch homological mirror symmetry for curve singularities\n\nSpeakers:
Cheol-Hyun Cho\n\nAffiliation: Seoul National University\n\nVideo: Remote
Access Only\n\nFor a weighted homogeneous polynomial and a choice of a di
agonal\nsymmetry group\, we define a new Fukaya category based on wrapped
\nFukaya category of its Milnor fiber together with monodromy\ninformation
. It is analogous to the variation operator in singularity\ntheory. As an
application\, we formulate a complete version of\nBerglund-Hübsch homologi
cal mirror symmetry and prove it for two\nvariable cases. Namely\, given o
ne of the polynomials $f= x^p+y^q\,\nx^p+xy^q\,x^py+xy^q$ and a symmetry g
roup $G$\, we use Floer theoretic\nconstruction to obtain the transpose po
lynomial $f^t$ with the\ntranspose symmetry group $G^t$ as well as an expl
icit A-infinity\nequivalence between the new Fukaya category of $(f\,G)$ t
o the matrix\nfactorization category of $(f^t\, G^t)$. In this case\, mono
dromy is\nmirror to the restriction of LG model to a hypersurface. For ADE
\nsingularities\, Auslander-Reiten quiver for indecomposable matrix\nfacto
rizations were known from 80's\, and we find the corresponding\nLagrangian
s as well as surgery exact sequences. This is a joint work\nwith Dongwook
Choa and Wonbo Jung.
DTSTART;TZID=America/New_York:20200918T091500
DTEND;TZID=America/New_York:20200918T104500
LAST-MODIFIED:20201012T214032Z
LOCATION:Remote Access Only
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-11
END:VEVENT
BEGIN:VEVENT
UID:3ea33c65-1307-42c7-b5a0-62fbf7f87db9
DTSTAMP:20201203T104600Z
CREATED:20200911T152020Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART;TZID=America/New_York:20200918T150000
DTEND;TZID=America/New_York:20200918T160000
LAST-MODIFIED:20200911T152041Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/events/princeton-university-hsc-group-discussion-15
1
END:VEVENT
BEGIN:VEVENT
UID:1de0c7c4-c403-4b89-bbf0-ba0cfbcfad29
DTSTAMP:20201203T104600Z
CREATED:20200110T165145Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20200921T090000
DTEND;TZID=America/New_York:20200921T090000
LAST-MODIFIED:20200110T165145Z
LOCATION:
SUMMARY:IAS School of Mathematics Term I Begins
URL:https://www.ias.edu/events/ias-school-mathematics-term-i-begins
END:VEVENT
BEGIN:VEVENT
UID:8b521e9e-5235-471a-b0c6-0cf1df35c119
DTSTAMP:20201203T104600Z
CREATED:20200828T030236Z
DESCRIPTION:Topic: An analytic model for [OIII] fine structure emission fro
m high redshift galaxies\n\nSpeakers: Discussion Leader: Shengqi Yang\n\nA
ffiliation: New York University\n\nEach week\, we hold a relatively inform
al seminar/discussion series\nwith an emphasis on extra-galactic and large
-scale structure\nastrophysics.\n\nDuring Galread a leader/visitor present
s a recent paper to the\ndiscussion group. The PDF of the paper is project
ed onto a large\nscreen\, and a guest explains the paper\, section by sect
ion\, in greater\ndetail than may be explained within the text of the arti
cle. To aid\nwith discussion\, only the article PDF is presented -- no\npo
werpoint-style slides. Galread discussions are very friendly and\ninteract
ive.\n
DTSTART;TZID=America/New_York:20200921T110000
DTEND;TZID=America/New_York:20200921T120000
LAST-MODIFIED:20200909T160425Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-29
END:VEVENT
BEGIN:VEVENT
UID:85166e70-fab1-4806-ae39-b4da8bc01e4e
DTSTAMP:20201203T104600Z
CREATED:20200828T103037Z
DESCRIPTION:Topic: Exploring the Surfaces and Atmospheres of the Galilean M
oons with ALMA \n\nSpeakers: Katherine de Kleer\n\nAffiliation: California
Institute of Technology\n\nThe satellites of the Solar System’s giant pla
nets are one of the\ncurrent frontiers of planetary science\, and will be
the targets of\nmultiple spacecraft missions in the coming decades. Earth-
based\ntelescopes have had the ability to spatially resolve many of these
\nobjects for decades\, enabling regional-scale geological and\natmospheri
c studies. The Atacama Large Millimeter Array (ALMA) has now\nextended suc
h high spatial resolution capabilities to millimeter\nwavelengths\, where
emission from satellite surfaces and atmospheres\nallows us to map subsurf
ace heat flow\, thermophysical surface\nproperties\, and atmospheric struc
ture. I will discuss some recent work\nbased on ALMA observations of the G
alilean moons\, and how we are using\nthese data to unravel the processes
that govern the surface properties\nand atmospheric evolution of moons.\n
DTSTART;TZID=America/New_York:20200921T121500
DTEND;TZID=America/New_York:20200921T131500
LAST-MODIFIED:20200918T191207Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/events/princeton-university-exoplanet-discussion-gr
oup-46
END:VEVENT
BEGIN:VEVENT
UID:8569957d-b235-498e-b752-f71760d94997
DTSTAMP:20201203T104600Z
CREATED:20200828T040135Z
DESCRIPTION:Speakers: Speaker 1: Oliver Philcox | Speaker 2: Jose Manuel Zo
rrilla Matilla\n\nAffiliation: Speaker 1: Princeton University | Speaker 2
: Princeton University\n\n
DTSTART;TZID=America/New_York:20200921T123000
DTEND;TZID=America/New_York:20200921T140000
LAST-MODIFIED:20200922T192725Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-16
END:VEVENT
BEGIN:VEVENT
UID:883ea4e5-0329-426c-bb98-44d54ae56011
DTSTAMP:20201203T104600Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20200922T123000
DTEND;TZID=America/New_York:20200922T133000
LAST-MODIFIED:20200910T164435Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-132
END:VEVENT
BEGIN:VEVENT
UID:3ecb68dc-a70d-49b6-9c67-61d3258eacaf
DTSTAMP:20201203T104600Z
CREATED:20200908T123826Z
DESCRIPTION:Topic: Spectral geometry on metric graphs\n\nSpeakers: Lior Alo
n\n\nAffiliation: Member\, School of Mathematics\n\nVideo: Wolfensohn Hall
and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200922T140000
DTEND;TZID=America/New_York:20200922T141500
LAST-MODIFIED:20200924T011732Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-500
END:VEVENT
BEGIN:VEVENT
UID:e7076bbd-b998-41e1-83d9-626208ee37d9
DTSTAMP:20201203T104600Z
CREATED:20200908T124252Z
DESCRIPTION:Topic: On the (Computational) Approximability of Quadratic Maxi
mization over Convex Sets\n\nSpeakers: Vijay Bhattiprolu\n\nAffiliation: M
ember\, School of Mathematics\n\nVideo: Wolfensohn Hall and Remote Access
- see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200922T141500
DTEND;TZID=America/New_York:20200922T143000
LAST-MODIFIED:20200924T011826Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-502
END:VEVENT
BEGIN:VEVENT
UID:841372b4-633a-4dc7-b33c-08508af933d2
DTSTAMP:20201203T104600Z
CREATED:20200908T124326Z
DESCRIPTION:Topic: Affine Springer fibers and the small quantum group\n\nSp
eakers: Pablo Boixeda Alvarez\n\nAffiliation: Member\, School of Mathemati
cs\n\nVideo: Wolfensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200922T143000
DTEND;TZID=America/New_York:20200922T144500
LAST-MODIFIED:20200924T011914Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-503
END:VEVENT
BEGIN:VEVENT
UID:69f32a58-aa48-4e38-973d-63b9a7c19e27
DTSTAMP:20201203T104600Z
CREATED:20200908T125057Z
DESCRIPTION:Topic: Non smooth spaces with Ricci curvature bounded from belo
w\n\nSpeakers: Elia Bruè\, Elia Bruè\n\nAffiliation: Member\, School of Ma
thematics\n\n
DTSTART;TZID=America/New_York:20200922T160000
DTEND;TZID=America/New_York:20200922T161500
LAST-MODIFIED:20201020T153236Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-506
END:VEVENT
BEGIN:VEVENT
UID:89d1e7c2-dd28-492a-8753-e5a5940287e5
DTSTAMP:20201203T104600Z
CREATED:20200908T125037Z
DESCRIPTION:Topic: Symplectic topology of open manifolds\n\nSpeakers: Laure
nt Côté\n\nAffiliation: Member\, School of Mathematics\n\n
DTSTART;TZID=America/New_York:20200922T161500
DTEND;TZID=America/New_York:20200922T163000
LAST-MODIFIED:20200924T012224Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-505
END:VEVENT
BEGIN:VEVENT
UID:801bb288-38de-47f6-9d57-1f1518c132ed
DTSTAMP:20201203T104600Z
CREATED:20200908T125014Z
DESCRIPTION:Topic: Modular representation theory of p-adic groups\n\nSpeake
rs: Andrea Dotto\n\nAffiliation: Member\, School of Mathematics\n\nVideo:
Wolfensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200922T163000
DTEND;TZID=America/New_York:20200922T164500
LAST-MODIFIED:20200924T012301Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-504
END:VEVENT
BEGIN:VEVENT
UID:435f69ae-c24d-4097-8e4e-32778bb012c7
DTSTAMP:20201203T104600Z
CREATED:20200908T125235Z
DESCRIPTION:Topic: A tale of two bases\n\nSpeakers: Anne Dranowski\n\nAffil
iation: Member\, School of Mathematics\n\nVideo: Wolfensohn Hall and Remot
e Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200923T140000
DTEND;TZID=America/New_York:20200923T141500
LAST-MODIFIED:20200924T012543Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-507
END:VEVENT
BEGIN:VEVENT
UID:59e45791-420c-4db6-910c-116c38be11e0
DTSTAMP:20201203T104600Z
CREATED:20200908T125300Z
DESCRIPTION:Topic: Open Problem(s) in p-Cell Theory\n\nSpeakers: Lars Jense
n\n\nAffiliation: Member\, School of Mathematics\n\nVideo: Wolfensohn Hall
and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200923T141500
DTEND;TZID=America/New_York:20200923T143000
LAST-MODIFIED:20200924T012609Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-508
END:VEVENT
BEGIN:VEVENT
UID:e7655c64-c9c6-4a8a-ade2-a1ec7f4ef944
DTSTAMP:20201203T104600Z
CREATED:20200908T125323Z
DESCRIPTION:Topic: Quasi-modular forms from elliptic Noether-Lefschetz theo
ry\n\nSpeakers: François Greer\n\nAffiliation: Member\, School of Mathema
tics\n\nVideo: Wolfensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200923T143000
DTEND;TZID=America/New_York:20200923T144500
LAST-MODIFIED:20200924T012634Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-509
END:VEVENT
BEGIN:VEVENT
UID:024eb64a-7d76-43e0-9395-16b9d4be153b
DTSTAMP:20201203T104600Z
CREATED:20200908T125354Z
DESCRIPTION:Topic: Some Representations of Special Linear Groups\n\nSpeaker
s: Nate Harman\n\nAffiliation: Member\, School of Mathematics\n\nVideo: Wo
lfensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200923T160000
DTEND;TZID=America/New_York:20200923T161500
LAST-MODIFIED:20200924T012658Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-510
END:VEVENT
BEGIN:VEVENT
UID:d80a8425-855f-4dbb-a800-2c3969032e4e
DTSTAMP:20201203T104600Z
CREATED:20200908T125412Z
DESCRIPTION:Topic: Noncommutative resolutions and intersection cohomology f
or quotient singularities\n\nSpeakers: Tudor Padurariu\n\nAffiliation: Mem
ber\, School of Mathematics\n\nVideo: Wolfensohn Hall and Remote Access -
see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200923T161500
DTEND;TZID=America/New_York:20200923T163000
LAST-MODIFIED:20200924T012726Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-511
END:VEVENT
BEGIN:VEVENT
UID:c60de56b-c199-4023-8946-6dc565a53aca
DTSTAMP:20201203T104600Z
CREATED:20200908T125431Z
DESCRIPTION:Topic: On globally dissipative Euler flows\n\nSpeakers: Hyunju
Kwon\n\nAffiliation: Member\, School of Mathematics\n\nVideo: Wolfensohn H
all and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200923T163000
DTEND;TZID=America/New_York:20200923T164500
LAST-MODIFIED:20200924T012750Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-512
END:VEVENT
BEGIN:VEVENT
UID:59e56b0c-d30f-4491-a3d8-11cd7a988958
DTSTAMP:20201203T104600Z
CREATED:20200828T013111Z
DESCRIPTION:Topic: Direct measurements of the Galactic acceleration\n\nSpea
kers: Sukanya Chakrabarti\n\nAffiliation: Rochester Institute of Technolog
y\; Member\, School of Natural Sciences\n\nI will discuss recent work that
lays out two methods to obtain direct\nmeasurements of the Galactic accel
eration. First\, I will review our\nrecent work in using high precision sp
ectrographs to measure the\nGalactic acceleration. These measurements can
be used to determine the\ntotal density from the Poisson equation\, and gi
ven an accounting of\nthe baryon budget\, the dark matter density. Secondl
y\, I will discuss\nongoing work to use pulsar timing data to measure the
local Galactic\nacceleration\, which thereby gives a direct measure of the
Oort limit.\nI will end by discussing the potential for combining these t
wo methods\nto constrain theories of gravity and dark matter sub-structure
.\n
DTSTART;TZID=America/New_York:20200924T110000
DTEND;TZID=America/New_York:20200924T120000
LAST-MODIFIED:20201201T200407Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/events/institute-advanced-study-astrophysics-semina
r-287
END:VEVENT
BEGIN:VEVENT
UID:46a2f8f2-f339-4b59-97a5-16abe69241bf
DTSTAMP:20201203T104600Z
CREATED:20200901T212443Z
DESCRIPTION:Topic: A non-archimedean definable Chow theorem\n\nSpeakers: Ab
hishek Oswal\n\nAffiliation: Member\, School of Mathematics\n\nVideo: Remo
te Access - see Zoom link below\n\nIn recent years\, o-minimality has foun
d some striking applications to\ndiophantine geometry. The utility of o-mi
nimal structures originates\nfrom the remarkably tame topological properti
es satisfied by sets\ndefinable in such structures. Despite the rigidity t
hat it imposes\,\nthe theory is sufficiently flexible to allow for a range
of analytic\nconstructions. An illustration of this `tame' property is th
e\nfollowing surprising generalization of Chow's theorem proved by\nPeterz
il and Starchenko - A closed analytic subset of a complex\nalgebraic varie
ty that is also definable in an o-minimal structure\, is\nin fact algebrai
c. While the o-minimal machinery aims to capture the\narchimedean order to
pology of the real line\, it is natural to wonder\nif such a machinery can
be set up over non-archimedean fields. In this\ntalk\, we shall explore a
non-archimedean analogue of an o-minimal\nstructure and a version of the
definable Chow theorem in this context.\n
DTSTART;TZID=America/New_York:20200924T163000
DTEND;TZID=America/New_York:20200924T173000
LAST-MODIFIED:20201001T145548Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-232
END:VEVENT
BEGIN:VEVENT
UID:981cbb7e-485a-46ff-aedf-568f6ba581b3
DTSTAMP:20201203T104600Z
CREATED:20200901T215248Z
DESCRIPTION:Topic: Triangulated persistence categories\n\nSpeakers: Jun Zha
ng\n\nAffiliation: Université de Montréal\n\nThis talk will discuss a new
algebraic structure called triangulated\npersistence category (TPC). It co
mbines the triangulated category\nstructure with the persistence module st
ructure. This algebraic\nstructure can be used to associate a metric topol
ogy on the object-set\nof a triangulated category\, which leads to various
dynamical questions\non a pure algebraic set-up. Many examples are natura
lly endowed with\nthe TPC structure\, for instance\, derived Fukaya catego
ry\, Tamarkin\ncategory\, etc. In this talk\, we will illustrate one algeb
raic example\nin depth via extending the Bondal-Kapranov’s classical\npre-
triangulated dg-category to a filtered version. This talk is based\non an
in-progress project joint with Paul Biran and Octav Cornea.\n
DTSTART;TZID=America/New_York:20200925T091500
DTEND;TZID=America/New_York:20200925T104500
LAST-MODIFIED:20201012T214039Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-12
END:VEVENT
BEGIN:VEVENT
UID:931442ea-051d-48f9-9533-b10a1b0ab839
DTSTAMP:20201203T104600Z
CREATED:20200922T131736Z
DESCRIPTION:Topic: Cosmological Bounces and Bouncing Cosmology\n\nSpeakers:
Paul Steinhardt\n\nAffiliation: Princeton University\n\nThis week\, Paul
Steinhardt will introduce his theoretical cosmology\ngroup. The talk will
introduce the group working on cosmological\ntheories in which the big ban
g is replaced by a smooth\, non-singular\nbounce and the large-scale prope
rties of the universe are explained by\na period of slow contraction that
precedes the bounce.
DTSTART;TZID=America/New_York:20200925T120000
DTEND;TZID=America/New_York:20200925T130000
LAST-MODIFIED:20200922T132045Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Lunch Seminar
URL:https://www.ias.edu/events/princeton-university-gravity-group-lunch-sem
inar-38
END:VEVENT
BEGIN:VEVENT
UID:d15d5075-7456-4c1b-86a4-d9fbd8267543
DTSTAMP:20201203T104600Z
CREATED:20200917T210215Z
DESCRIPTION:Topic: Turbulent energy cascade rate in the solar wind and the
Earth's magnetosheath using in-situ spacecraft data \n\nSpeakers: Lina Had
id\n\nAffiliation: Laboratoire de Physique des Plasmas\n\nCompressible tur
bulence has been a subject of active research within\nthe space physics co
mmunity for the last three decades and is actually\nbelieved to be essenti
al for understanding the physics of the solar\nwind (for instance the heat
ing of the fast wind)\, of the interstellar\nmedium (in cold molecular clo
uds) and other astrophysical and space\nphenomena.\n\nIn this talk I will
give a review of the different studies that we\nhave done regarding the co
mpressible and incompressible cascade rates\nin the interplanetary space.
Firstly\, using the exact law of\ncompressible isothermal magnetohydrodyna
mic (MHD) turbulence [Banerjee\n& Galtier\, PRE\, 2013]\, we give an estim
ation of the compressible\nenergy cascade rate (|εC|) in the Earth’s magne
tosheath using\nTHEMIS and CLUSTER spacecraft data and show that it is at
least three\norders of magnitude larger than its value in the solar wind.
Moreover\,\nwe show the role of the density fluctuations in increasing the
spatial\nanisotropy in the Earth's magnetosheath [Hadid et al.\, PRL\, 20
18].\nSecondly\, using the exact law of compressible Hall MHD turbulence\n
[Andrés & Sahraoui\, PRE\, 2017] we give a complete estimation of |εC\n| a
t the MHD and the sub-ion scales in the Earth's magnetosheath using\nMMS d
ata [Andrés et al.\, PRL\, 2019]. Finally we show the radial\nevolution of
the turbulent cascade rate from the Sun (~0.2 A.U.) up to\nMars (~1.5 A.U
.)\, using Parker Solar Probe and Maven data [Andrés et\nal. in prep.].\n
DTSTART;TZID=America/New_York:20200925T123000
DTEND;TZID=America/New_York:20200925T133000
LAST-MODIFIED:20200917T212306Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/events/princeton-university-astroplasmas-seminar-94
END:VEVENT
BEGIN:VEVENT
UID:9299dacf-47ff-4e32-a5da-6194899df344
DTSTAMP:20201203T104600Z
CREATED:20200908T143347Z
DESCRIPTION:Topic: Eisenstein Ideals: A Link Between Geometry and Arithmeti
c\n\nSpeakers: Emmanuel Lecouturier\n\nAffiliation: Member\, School of Mat
hematics\n\nVideo: Wolfensohn Hall and Remote Access - see Zoom link below
\n\n
DTSTART;TZID=America/New_York:20200925T140000
DTEND;TZID=America/New_York:20200925T141500
LAST-MODIFIED:20201001T145902Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-513
END:VEVENT
BEGIN:VEVENT
UID:8cb256e3-2368-4508-b413-5d96db2381b2
DTSTAMP:20201203T104600Z
CREATED:20200908T143429Z
DESCRIPTION:Topic: Koszul duality phenomenon for the Hecke category\n\nSpea
kers: Shotaro Makisumi\n\nAffiliation: Member\, School of Mathematics\n\nV
ideo: Wolfensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200925T141500
DTEND;TZID=America/New_York:20200925T143000
LAST-MODIFIED:20201001T145932Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-515
END:VEVENT
BEGIN:VEVENT
UID:6760c8a4-4d61-4c53-bd88-1d7ad41482af
DTSTAMP:20201203T104600Z
CREATED:20200908T143714Z
DESCRIPTION:Topic: Lévy Matrices\n\nSpeakers: Patrick Lopatto\n\nAffiliatio
n: Member\, School of Mathematics\n\nVideo: Wolfensohn Hall and Remote Acc
ess - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200925T143000
DTEND;TZID=America/New_York:20200925T144500
LAST-MODIFIED:20201001T150000Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-518
END:VEVENT
BEGIN:VEVENT
UID:3d960cb1-11e3-484b-89b8-095daca30e6a
DTSTAMP:20201203T104600Z
CREATED:20200908T143409Z
DESCRIPTION:Topic: Cohomology of line bundles on flag varieties\n\nSpeakers
: Linyuan Liu\n\nAffiliation: Member\, School of Mathematics\n\nVideo: Wol
fensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200925T160000
DTEND;TZID=America/New_York:20200925T161500
LAST-MODIFIED:20201001T150125Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-514
END:VEVENT
BEGIN:VEVENT
UID:38175df0-6898-429a-a1f5-41465a8748cc
DTSTAMP:20201203T104600Z
CREATED:20200908T143547Z
DESCRIPTION:Topic: Tame topologies in non-archimedean geometry\n\nSpeakers:
Abhishek Oswal\n\nAffiliation: Member\, School of Mathematics\n\nVideo: W
olfensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200925T161500
DTEND;TZID=America/New_York:20200925T163000
LAST-MODIFIED:20201001T150259Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-516
END:VEVENT
BEGIN:VEVENT
UID:f551bc7a-09f9-44a4-9cfc-124866e503f6
DTSTAMP:20201203T104600Z
CREATED:20200908T143604Z
DESCRIPTION:Topic: Applications of the trace of Frobenius: past\, present\,
and future\n\nSpeakers: Tony Feng\n\nAffiliation: Member\, School of Math
ematics\n\nVideo: Wolfensohn Hall and Remote Access - see Zoom link below
\n\n
DTSTART;TZID=America/New_York:20200925T163000
DTEND;TZID=America/New_York:20200925T164500
LAST-MODIFIED:20201001T150327Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-517
END:VEVENT
BEGIN:VEVENT
UID:802b908c-b5d0-48ce-a21d-421ddd084964
DTSTAMP:20201203T104600Z
CREATED:20200828T030300Z
DESCRIPTION:Topic: FLEET: A Redshift-Agnostic Machine Learning Pipeline to
Rapidly Identify Hydrogen-Poor Superluminous Supernovae\n\nSpeakers: Discu
ssion Leader: Sebastian Gomez\n\nAffiliation: Harvard University\n\nEach w
eek\, we hold a relatively informal seminar/discussion series\nwith an emp
hasis 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 exp
lains the paper\, section by section\, in greater\ndetail than may be expl
ained within the text of the article. To aid\nwith discussion\, only the a
rticle PDF is presented -- no\npowerpoint-style slides. Galread discussion
s are very friendly and\ninteractive.\n
DTSTART;TZID=America/New_York:20200928T110000
DTEND;TZID=America/New_York:20200928T120000
LAST-MODIFIED:20200909T160701Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-30
END:VEVENT
BEGIN:VEVENT
UID:643c20b8-a01d-46ee-a48a-5d6e1963f990
DTSTAMP:20201203T104600Z
CREATED:20200917T210856Z
DESCRIPTION:Topic: Protoplanetary Disks and Clouds in Substellar Atmosphere
s: Insights from Microphysics\n\nSpeakers: Diana Powell\n\nAffiliation: Un
iversity of California Santa Cruz\n\nIn this talk\, I will provide evidenc
e that protoplanetary disks are\nmore than an order of magnitude more mass
ive than previously\nappreciated\, that the detailed properties of clouds
shape observations\nof substellar atmospheres\, and that the physics of mo
deling clouds\ngives a new understanding of the solid content in protoplan
etary\ndisks. Clouds on extrasolar worlds are seemingly abundant and\ninte
rfere with observations\; however\, little is known about their\npropertie
s. In our modeling\, we predict cloud properties from first\nprinciples an
d investigate how the interesting observational\nproperties of hot Jupiter
s and brown dwarfs can be explained by\nclouds. Next\, I will report on a
new set of models that reconcile\ntheory with observations of protoplaneta
ry disks and create a new set\nof initial conditions for planet formation
models. The total mass\navailable in protoplanetary disks is a critical in
itial condition for\nunderstanding planet formation\; however\, the surfac
e densities of\nprotoplanetary disks still remain largely unconstrained du
e to\nuncertainties in the dust-to-gas ratio and CO abundance. I make use
of\nrecent resolved multiwavelength observations of disks in the\nmillimet
er to constrain the aerodynamic properties of dust grains to\ninfer the to
tal disk mass without an assumed dust opacity or\ntracer-to-H2 ratio. Fina
lly\, I will present new work that combines the\nmicrophysics of cloud for
mation in planetary atmospheres and our new\nmodels of protoplanetary disk
s to show that the observed depletion of\nCO in well-studied disks is cons
istent with freeze-out processes and\nthat the variable CO depletion obser
ved in disks can be explained by\nthe processes of freeze-out and particle
drift.\n
DTSTART;TZID=America/New_York:20200928T121500
DTEND;TZID=America/New_York:20200928T131500
LAST-MODIFIED:20200925T134314Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/events/princeton-university-exoplanet-discussion-gr
oup-49
END:VEVENT
BEGIN:VEVENT
UID:fb4b8bde-4211-4bcd-b81e-bca5173a058a
DTSTAMP:20201203T104600Z
CREATED:20200922T141132Z
DESCRIPTION:Topic: Neutron star mergers: On the impact of high spins in mul
ti-messenger gravitational wave events\n\nSpeakers: Elias Most\n\nAffiliat
ion: Princeton University\; Member\, School of Natural Sciences\n\nSince t
he first detection of a gravitational wave event of the merger\nof two neu
tron stars in 2017\, two more detections in the neutron star\nmass range h
ave been announced earlier this year. The first one\,\nGW190425\, involved
an unusually massive neutron star\, the second one\,\nGW190814\, had a co
mpanion in the lower mass gap that could either have\nbeen the heaviest ne
utron star or the lightest black hole ever\nobserved. One of the uncertain
ties in those detections is allowing for\nthe possibility of having high i
nitial spins before the merger.\n\nIn this talk\, I will discuss the poten
tial observational impact of the\npresence of high spins in the inspiral.
In particular\, I will show\nwhat effect high spins can have on the emissi
on of – yet to be\nobserved – electromagnetic precursors and on the mass e
jected\ndynamically during the merger process.\n\nThis will be followed by
the presentation of a new method to place\nlimits on high spins and small
mass ratios in mergers involving a very\nmassive neutron star\, such as G
W190425.\n\nFinally\, I will comment on potential implications for the equ
ation of\nstate\, in case the secondary in GW190814 was (once) a neutron s
tar.\nFollowing up on the possibility of having low mass black holes in th
e\nlower mass gap\, I will present the results of an on-going study of\nne
ar equal mass black hole-neutron star mergers. In particular\, I will\nfoc
us on the impact of initial black hole spin on the viability for\nelectrom
agnetic counterparts.\n
DTSTART;TZID=America/New_York:20200928T123000
DTEND;TZID=America/New_York:20200928T123000
LAST-MODIFIED:20200925T184016Z
LOCATION:via ZOOM
SUMMARY:Princeton University Gravity Initiative Lunch
URL:https://www.ias.edu/events/princeton-university-gravity-initiative-lunc
h-3
END:VEVENT
BEGIN:VEVENT
UID:70365612-f0a5-454d-ac6f-0a0c9adffc7b
DTSTAMP:20201203T104600Z
CREATED:20200828T040202Z
DESCRIPTION:Topic: Topic 1: Halo gas thermodynamics from the cosmic microwa
ve background: implications for large-scale structure and galaxy formation
| Topic 2: Rethinking the Nature of Interstellar Dust: Implications for M
icrowave Polarization\n\nSpeakers: Speaker 1: Emmanuel Schaan | Speaker 2:
Brandon Hensley\n\nAffiliation: Speaker 1: Lawrence Berkeley National Lab
oratory | Speaker 2: Princeton University\n\nSPEAKER 1: \n\nEMMANUEL SCHAA
N (LBNL)\n\nTITLE: Halo gas thermodynamics from the cosmic microwave backg
round:\nimplications for large-scale structure and galaxy formation\n\nABS
TRACT: Understanding galaxy formation is an outstanding problem in\nAstrop
hysics. The feedback processes that drive it\, exploding stars\nand accret
ion onto supermassive black holes\, are poorly understood.\nThis results i
n an order unity uncertainty in the distribution of the\ngas inside halos\
, the ``missing baryon problem''. Because baryons are\n15% of the total ma
ss in the universe\, this baryonic uncertainty is\nthe largest theoretical
systematics for percent precision weak lensing\nsurveys like DES\, HSC\,
Rubin Observatory\, Roman Observatory and\nEuclid.\nBy measuring the kinem
atic and thermal Sunyaev-Zel'dovich effects (kSZ\nand tSZ)\, high resoluti
on and high sensitivity CMB experiments can\nsolve these issues by measuri
ng the gas thermodynamics in galaxy\ngroups and clusters\, at high redshif
t and out to the outskirts of the\nhalo. I will present joint tSZ\, kSZ an
d dust measurements of BOSS\n(CMASS) galaxy groups\, for which clustering
and lensing data is also\navailable. Using data from the Atacama Cosmology
Telescope (ACT)\, we\nproduced the highest significance kSZ measurement t
o date. This\nmeasurement shows with high statistical confidence that the
gas is\nmore spread out than the dark matter. It informs the modeling of t
he\nCMASS galaxy-galaxy lensing data\, and shows that the small-scale\n``l
ensing is low'' tension is not entirely caused by baryonic effects.\nFinal
ly\, comparing the observed kSZ and tSZ to hydrodynamical\nsimulations rev
eals insight about the modalities of feedback.\n\nSPEAKER 2: \n\nBRANDON H
ENSLEY (PRINCETON)\n\nTITLE: Rethinking the Nature of Interstellar Dust: I
mplications for\nMicrowave Polarization\n
DTSTART;TZID=America/New_York:20200928T123000
DTEND;TZID=America/New_York:20200928T140000
LAST-MODIFIED:20200928T132918Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-17
END:VEVENT
BEGIN:VEVENT
UID:aed597a8-bd5b-418f-8f52-e676170d0ad1
DTSTAMP:20201203T104600Z
CREATED:20200916T143659Z
DESCRIPTION:Topic: An introductory survey on expanders and their applicatio
ns\n\nSpeakers: Avi Wigderson\n\nAffiliation: Herbert H. Maass Professor\,
School of Mathematics\n\nVideo: Simonyi Hall 101 and Remote Access - see
Zoom link below\n\nExpander graphs are among the most useful objects in co
mputer science\nand mathematics. They have found applications in numerous
areas of\nboth. I will review their definition\, and explain some of the m
any\napplications. Time permitting\, I will also discuss some of the\ndiff
erent ways of constructing them\, and ask some of my favorite open\nproble
ms regarding them.\n
DTSTART;TZID=America/New_York:20200929T103000
DTEND;TZID=America/New_York:20200929T123000
LAST-MODIFIED:20201103T235502Z
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-455
END:VEVENT
BEGIN:VEVENT
UID:c98be3c3-dbcc-47b6-9447-ff41ed1b06f3
DTSTAMP:20201203T104600Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20200929T123000
DTEND;TZID=America/New_York:20200929T133000
LAST-MODIFIED:20200910T164528Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-133
END:VEVENT
BEGIN:VEVENT
UID:d2936f46-6844-4b90-96b7-8abb4827f1aa
DTSTAMP:20201203T104600Z
CREATED:20200908T162431Z
DESCRIPTION:Topic: Asymptotic enumeration problems on the Hamming Cube\n\nS
peakers: Jinyoung Park\n\nAffiliation: Member\, School of Mathematics\n\nV
ideo: Wolfensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200929T140000
DTEND;TZID=America/New_York:20200929T141500
LAST-MODIFIED:20201001T150455Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-522
END:VEVENT
BEGIN:VEVENT
UID:53c9b5e2-097f-4553-989c-c3d86c3232c3
DTSTAMP:20201203T104600Z
CREATED:20200908T162524Z
DESCRIPTION:Topic: 1% Cocycles and Finding Vertices of Squares\n\nSpeakers:
Sarah Peluse\n\nAffiliation: Institute for Advanced Study and Princeton U
niversity\; Veblen Research Instructor\, School of Mathematics\n\nVideo: W
olfensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200929T141500
DTEND;TZID=America/New_York:20200929T143000
LAST-MODIFIED:20201001T150529Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-523
END:VEVENT
BEGIN:VEVENT
UID:ce28f2e0-41b1-4332-b0ad-f7d9dcb14d58
DTSTAMP:20201203T104600Z
CREATED:20200908T162540Z
DESCRIPTION:Topic: Whittaker functions and lattice models\n\nSpeakers: Henr
ik Gustafsson\n\nAffiliation: Member\, School of Mathematics\n\nVideo: Wol
fensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200929T143000
DTEND;TZID=America/New_York:20200929T144500
LAST-MODIFIED:20201001T150605Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-524
END:VEVENT
BEGIN:VEVENT
UID:223b52c4-48a4-41a9-8125-759ee7006283
DTSTAMP:20201203T104600Z
CREATED:20200908T162321Z
DESCRIPTION:Topic: Extension complexity of (low-dimensional) polytopes\n\nS
peakers: Lisa Sauermann\n\nAffiliation: Stanford University\; Member\, Sch
ool of Mathematics\n\nVideo: Wolfensohn Hall and Remote Access - see Zoom
link below\n\n
DTSTART;TZID=America/New_York:20200929T160000
DTEND;TZID=America/New_York:20200929T161500
LAST-MODIFIED:20201001T150733Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-519
END:VEVENT
BEGIN:VEVENT
UID:ee0d6c22-02dd-4709-90f3-1e0408a2dfbf
DTSTAMP:20201203T104600Z
CREATED:20200908T162350Z
DESCRIPTION:Topic: Spectral numbers of quantum cohomologies\n\nSpeakers: Sa
ra Tukachinsky\n\nAffiliation: Member\, School of Mathematics\n\nVideo: Wo
lfensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200929T161500
DTEND;TZID=America/New_York:20200929T163000
LAST-MODIFIED:20201001T150801Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-520
END:VEVENT
BEGIN:VEVENT
UID:df50d03a-3042-47c3-91d5-4c50b51f0650
DTSTAMP:20201203T104600Z
CREATED:20200908T162408Z
DESCRIPTION:Topic: Falconer distance set problem\n\nSpeakers: Hong Wang\n\n
Affiliation: Member\, School of Mathematics\n\nVideo: Wolfensohn Hall and
Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20200929T163000
DTEND;TZID=America/New_York:20200929T164500
LAST-MODIFIED:20201001T150831Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-521
END:VEVENT
BEGIN:VEVENT
UID:a47d9ef0-da11-4ec7-b76e-03277b6fbe71
DTSTAMP:20201203T104600Z
CREATED:20200922T203136Z
DESCRIPTION:Speakers: David Lang\n\n
DTSTART;TZID=America/New_York:20200929T173000
DTEND;TZID=America/New_York:20200929T173000
LAST-MODIFIED:20201117T232338Z
LOCATION:
SUMMARY:Friends Virtual Talk with David Lang
URL:https://www.ias.edu/events/friends-virtual-talk-david-lang
END:VEVENT
BEGIN:VEVENT
UID:69b3cb28-8174-4fc7-b41f-1e953858e1a5
DTSTAMP:20201203T104600Z
CREATED:20200914T142212Z
DESCRIPTION:Topic: Finite groups as algebraic groups in defining characteri
stic\n\nSpeakers: Raphaël Rouquier\n\nAffiliation: University of Californi
a\, Los Angeles\; Member\, School of Mathematics\n\nVideo: Simonyi Hall 10
1 and Remote Access\n\nWe will discuss $p$-local representation theory and
conjectures of\nBroue and Alperin\, the latter been inspired by finite gr
oups of Lie\ntype in characteristic $p$. The issue is the extent to which
the\ncategory of representations can be reconstructed from that of proper
\nparabolic subgroups. In different settings\, a Borel suffices\n(Arkhipov
-Bezrukavnikov-Ginzburg for rational representations\, Colmez\nfor $GL_2$
over $\mathbb Q_p$).\n
DTSTART;TZID=America/New_York:20200930T150000
DTEND;TZID=America/New_York:20200930T170000
LAST-MODIFIED:20201030T014846Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory-2
END:VEVENT
BEGIN:VEVENT
UID:d79f23c1-b5f0-42d1-985c-e577137f6430
DTSTAMP:20201203T104600Z
CREATED:20200928T150444Z
DESCRIPTION:Topic: Introduction and organizational meeting\n\nSpeakers: Aks
hay Venkatesh\n\nAffiliation: Robert and Luisa Fernholz Professor\, School
of Mathematics\n\n
DTSTART;TZID=America/New_York:20201001T100000
DTEND;TZID=America/New_York:20201001T120000
LAST-MODIFIED:20200930T160531Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/events/moonshine-seminar
END:VEVENT
BEGIN:VEVENT
UID:dcc2e92f-0698-4f08-b93c-fb8c5848c087
DTSTAMP:20201203T104600Z
CREATED:20200708T174806Z
DESCRIPTION:Topic: Hubble Views of Massive Clusters and Giant Arcs Discover
ed by Planck\n\nSpeakers: Brenda Frye\n\nAffiliation: University of Arizon
a\; Member\, School of Natural Sciences\n\nWe have undertaken a novel cens
us of red sources identified by their\nrest-frame far infrared colors usin
g Planck and Herschel telescopes\,\nand not by the Sunyaev-Z'eldovich effe
ct (SZE). The vast majority of\nsources are high-redshift galaxy overdensi
ty candidates. These\nstructures have high total measured star formation r
ates of ~1000\nsolar masses per year and show tentative evidence for low m
olecular\ngas masses\, as expected for a population nearing the end of an
active\nepoch of star formation. On the other hand\, a small minority of\n
sources are dusty star forming galaxies (DSFGs) which are\nindividually-de
tected by Planck as a result of strong lensing by\nmassive foreground stru
ctures. We obtained Hubble Space Telescope\nWFC3-IR imaging in the fields
of six of these classical giant arcs. We\nfocus on one cluster lens that s
tands out for its a high mass and high\ndark-matter-density\, while at the
same time its low X-ray luminosity\nunremarkable Planck SZE decrement. We
discuss the possibility that\nthis double cluster may be intercepted in a
relatively rare 'pre-core'\ninitial infall state. As a result of its unus
ual physical properties\,\nthis cluster will be observed in guaranteed tim
e using the JWST.\n
DTSTART;TZID=America/New_York:20201001T110000
DTEND;TZID=America/New_York:20201001T120000
LAST-MODIFIED:20201201T200407Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/events/institute-advanced-study-astrophysics-semina
r-275
END:VEVENT
BEGIN:VEVENT
UID:2450b5de-2a93-480a-b642-da4d93a7fa78
DTSTAMP:20201203T104600Z
CREATED:20200908T162928Z
DESCRIPTION:Topic: Automorphic Periods and Relative Trace Formula\n\nSpeake
rs: Jingwei Xiao\n\nAffiliation: Institute for Advanced Study and Princeto
n University\; Veblen Research Instructor\, School of Mathematics\n\nVideo
: Wolfensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20201001T140000
DTEND;TZID=America/New_York:20201001T141500
LAST-MODIFIED:20201012T225546Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-525
END:VEVENT
BEGIN:VEVENT
UID:dc0dd0da-fa24-45ba-840e-5b3cafa30256
DTSTAMP:20201203T104600Z
CREATED:20200908T162945Z
DESCRIPTION:Topic: The geometric Satake equivalence\n\nSpeakers: Jize Yu\n
\nAffiliation: Member\, School of Mathematics\n\nVideo: Wolfensohn Hall an
d Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20201001T141500
DTEND;TZID=America/New_York:20201001T143000
LAST-MODIFIED:20201012T225620Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-526
END:VEVENT
BEGIN:VEVENT
UID:b44e5c9b-02fd-4b05-b168-37639712680d
DTSTAMP:20201203T104600Z
CREATED:20200908T163003Z
DESCRIPTION:Topic: Representations of p-adic groups for non-experts\n\nSpea
kers: Jessica Fintzen\n\nAffiliation: University of Cambridge and Duke Uni
versity\; Member\, School of Mathematics\n\nVideo: Wolfensohn Hall and Rem
ote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20201001T143000
DTEND;TZID=America/New_York:20201001T144500
LAST-MODIFIED:20201012T225725Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-527
END:VEVENT
BEGIN:VEVENT
UID:9c2b5653-f0d4-4c7a-8f04-f91a3be5d4bf
DTSTAMP:20201203T104600Z
CREATED:20200908T163025Z
DESCRIPTION:Topic: Hierarchies of contact manifolds\n\nSpeakers: Zhengyi Zh
ou\n\nAffiliation: Member\, School of Mathematics\n\nVideo: Wolfensohn Hal
l and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20201001T160000
DTEND;TZID=America/New_York:20201001T161500
LAST-MODIFIED:20201012T225801Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-528
END:VEVENT
BEGIN:VEVENT
UID:5d4394b1-2851-44b7-9dbd-0178f74c7f18
DTSTAMP:20201203T104600Z
CREATED:20200908T163043Z
DESCRIPTION:Topic: On unimodular groups allowing small measure growth\n\nSp
eakers: Ruixiang Zhang\n\nAffiliation: University of Wisconsin-Madison\; M
ember\, School of Mathematics\n\nVideo: Wolfensohn Hall and Remote Access
- see Zoom link below\n\n
DTSTART;TZID=America/New_York:20201001T161500
DTEND;TZID=America/New_York:20201001T163000
LAST-MODIFIED:20201012T225837Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-529
END:VEVENT
BEGIN:VEVENT
UID:5be3d50e-1637-438e-8fc9-f86d10a2dd80
DTSTAMP:20201203T104600Z
CREATED:20200908T163103Z
DESCRIPTION:Topic: Cohomological vanishing for moduli of curves\n\nSpeakers
: Emanuel Reinecke\n\nAffiliation: Member\, School of Mathematics\n\nVideo
: Wolfensohn Hall and Remote Access - see Zoom link below\n\n
DTSTART;TZID=America/New_York:20201001T163000
DTEND;TZID=America/New_York:20201001T164500
LAST-MODIFIED:20201012T225908Z
LOCATION:Wolfensohn Hall and Remote Access - see Zoom link below
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/events/short-talks-postdoctoral-members-530
END:VEVENT
BEGIN:VEVENT
UID:41b4196c-63c5-4646-a366-d0093e8a2e0b
DTSTAMP:20201203T104600Z
CREATED:20200901T215327Z
DESCRIPTION:Topic: Embedding ellipsoids into the one-point blowup of CP^2\n
\nSpeakers: Dusa McDuff\n\nAffiliation: Columbia University\n\nVideo: Remo
te Access - see Zoom link below\n\nThis talk reports on joint work with Ma
ria Bertozzi\, Tara Holm\, Emily\nMaw\, Grace Mwakyoma\, Ana Rita Pires\,
and Morgan Weiler on a WiSCon\nproject to investigate the embedding capaci
ty function of the\none-point blow up of $\mathbb CP^2$. We found three ne
w families of\nstaircases\, that are related by symmetries and have other
interesting\nstructural features. This talk will explain our findings and
our\nconjectures.\n
DTSTART;TZID=America/New_York:20201002T091500
DTEND;TZID=America/New_York:20201002T104500
LAST-MODIFIED:20201025T033906Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-13
END:VEVENT
BEGIN:VEVENT
UID:9f55c05a-e489-4e16-a003-c2ca2e390fa1
DTSTAMP:20201203T104600Z
CREATED:20200929T173500Z
DESCRIPTION:Topic: An Introduction to SuperBIT & GigaBIT: The Ups and Downs
of Balloon-borne Optical Astrophysics\n\nSpeakers: Javier Romualdez\, Ste
ven Benton\, Steven Li\n\nAffiliation: Princeton University\n\nThis week\,
Javier Romualdez\, Steven Benton\, and Steven Li will\nintroduce the Supe
rBIT and GigaBIT experiments\, two of the projects\nunderway in William Jo
nes' experimental cosmology group. The\nSuper-pressure Balloon-borne Imagi
ng Telescope (SuperBIT) is the\nfirst-of-its-kind\, three-axis stabilized\
, high-resolution\, wide-field\nimager designed to provide weak lensing me
asurements in near-UV to\nnear-IR bands (300–1000 nm). Operating in near-s
pace from the\nstratospheric balloon-borne environment\, SuperBIT's 0.5-m
telescope\nhas demonstrated diffraction-limited imaging over its 0.5-degre
e field\nof view. SuperBIT's successor\, the Giga-pixel BIT (GigaBIT)\, is
being\ndesigned with an upgraded camera and 1.3-m primary mirror. We repo
rt\non SuperBIT performance from the most recent 2019 test-flight\,\nprepa
rations for SuperBIT's science flight in 2022 from Wanaka\, NZ\,\nand curr
ent design progress for the GigaBIT instrument.
DTSTART;TZID=America/New_York:20201002T120000
DTEND;TZID=America/New_York:20201002T130000
LAST-MODIFIED:20200929T173500Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Lunch Seminar
URL:https://www.ias.edu/events/princeton-university-gravity-group-lunch-sem
inar-39
END:VEVENT
BEGIN:VEVENT
UID:3f7a56f0-ef52-42ee-9156-e17959fbc67c
DTSTAMP:20201203T104600Z
CREATED:20200923T154333Z
DESCRIPTION:Topic: A Unified Picture of Fast Radio Bursts\n\nSpeakers: Wenb
in Lu\n\nAffiliation: California Institute of Technology\n\nFast radio bur
sts (FRBs) are short duration (~ms)\, very bright\, radio\ntransients. The
ir detection a decade ago was a major unexpected\ndiscovery in astronomy i
n decades. Hunting for FRBs and measuring\ntheir physical properties have
become one of the leading scientific\ngoals in astronomy. This effort has
led to a rapidly growing sample\nwith extremely diverse properties in lumi
nosity ($10^{38}$ to\n$10^{45}$ erg/s)\, duration (0.1 ms to 10 ms)\, and
repetition rate\n(some objects have multiple bursts in an hour and many ju
st one burst\nin a few years). I will present a study of their cosmologica
l\nvolumetric rate density and provide evidence that these bursts all\nbel
ong to the same class of transients --- most likely all are\nrepeaters. Ac
cording to my model\, disturbances close to the surface of\na magnetar lau
nch Alfven waves into the magnetosphere\, which propagate\nto a distance o
f a few tens of neutron star radii and then produce\ncoherent radio emissi
on. The coincident hard X-rays associated with\nthe Galactic FRB 200428 ca
n be understood in this scenario. This model\nprovides a unified picture f
or weak Galactic FRBs as well as the\nbright bursts seen at cosmological d
istances. If time allows\, the\npolarization properties of FRBs will also
be addressed.
DTSTART;TZID=America/New_York:20201002T123000
DTEND;TZID=America/New_York:20201002T133000
LAST-MODIFIED:20200923T154611Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/events/princeton-university-astroplasmas-seminar-95
END:VEVENT
BEGIN:VEVENT
UID:71fce991-5f8d-42a0-a7ad-4802801110b1
DTSTAMP:20201203T104600Z
CREATED:20200925T202919Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART;TZID=America/New_York:20201002T150000
DTEND;TZID=America/New_York:20201002T160000
LAST-MODIFIED:20200925T202919Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/events/princeton-university-hsc-group-discussion-15
2
END:VEVENT
BEGIN:VEVENT
UID:107c2333-e62c-43a5-9a37-db5087844595
DTSTAMP:20201203T104600Z
CREATED:20200909T160951Z
DESCRIPTION:Topic: First results from SMAUG: The need for preventative stel
lar feedback and improved baryon cycling in semi-analytic models of galaxy
formation\n\nSpeakers: Discussion Leader: Viraj Pandya\n\nAffiliation: Un
iversity of California Santa Cruz\n\nEach week\, we hold a relatively info
rmal seminar/discussion series\nwith an emphasis on extra-galactic and lar
ge-scale structure\nastrophysics.\n\nDuring Galread a leader/visitor prese
nts a recent paper to the\ndiscussion group. The PDF of the paper is proje
cted onto a large\nscreen\, and a guest explains the paper\, section by se
ction\, in greater\ndetail than may be explained within the text of the ar
ticle. To aid\nwith discussion\, only the article PDF is presented -- no\n
powerpoint-style slides. Galread discussions are very friendly and\nintera
ctive.\n
DTSTART;TZID=America/New_York:20201005T110000
DTEND;TZID=America/New_York:20201005T120000
LAST-MODIFIED:20200909T160951Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-32
END:VEVENT
BEGIN:VEVENT
UID:6a5d276a-8161-4bc2-8120-a3446bcc5476
DTSTAMP:20201203T104601Z
CREATED:20200827T122103Z
DESCRIPTION:Topic: Splitting Necklaces: Existence\, Hardness and Approximat
ion\n\nSpeakers: Noga Alon\n\nAffiliation: Princeton University\n\nVideo:
Simonyi Hall 101 and Remote Access - see Zoom link below\n\nIt is known th
at any opened necklace with beads of n types can be\npartitioned by at mos
t (k-1)n cuts into intervals that can be\ndistributed into k collections\,
each containing the same number of\nbeads of each type (up to 1). The pro
of is topological and provides no\nefficient procedure for finding such cu
ts. In fact\, for k=2 the\nproblem of finding such cuts\, and even an easi
er approximate version\nof it\, are known to be PPA hard.\n\nI will discus
s efficient online and offline algorithms for solving the\nproblem and its
approximate version by increasing the number of cuts\,\nand show that the
number of cuts for the online case is essentially\noptimal. A representat
ive result is an efficient (offline) algorithm\nthat solves the problem fo
r a necklace with n types of beads\, m beads\nof each type and k=2 by maki
ng at most n(log m+2) cuts. The method\nprovides an exponential improvemen
t of a result of Bhatt and Leighton\nfrom the 80s.\n\nJoint work with Andr
ei Graur.\n
DTSTART;TZID=America/New_York:20201005T111500
DTEND;TZID=America/New_York:20201005T121500
LAST-MODIFIED:20201103T235525Z
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-461
END:VEVENT
BEGIN:VEVENT
UID:bcf37525-3a0e-4cb0-bc16-712d550f7ba3
DTSTAMP:20201203T104601Z
CREATED:20201002T185702Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART;TZID=America/New_York:20201005T121500
DTEND;TZID=America/New_York:20201005T131500
LAST-MODIFIED:20201002T185702Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/events/princeton-university-exoplanet-discussion-gr
oup-50
END:VEVENT
BEGIN:VEVENT
UID:9f721bc7-9e56-4f1e-8b6d-713944824839
DTSTAMP:20201203T104601Z
CREATED:20200921T145711Z
DESCRIPTION:Topic: Characterizing H I in CGM from Both Emission and Absorpt
ion\n\nSpeakers: Speaker 1: Yuguang Chen | Speaker 2: Leander Thiele\n\n
Affiliation: Speaker 1: California Institute of Technology | Speaker 2:
Princeton University\n\nWe present new Lyman-alpha observations focusing o
n the circumgalactic\nmedium of z~2 star-forming galaxies\, in both absorp
tion and emission\nusing Keck-LRIS and KCWI. For absorption\, we use the s
pectra of ~3000\ngalaxies from the Keck Baryonic Structure Survey (KBSS) t
o assemble\n~200\,000 distinct foreground-background galaxy pairs. The ens
emble of\nsightlines and foreground galaxies is used to construct a 2D map
of\nthe mean excess Lya optical depth as a function of projected\ngalacto
centric distance (20 -- 4000 pkpc) and line-of-sight velocity.\nWe compare
the map with the cosmological zoom-in simulation and a\nsimple two-compon
ent (inflow + outflow) analytical model. The\ncomparisons suggest that gal
axy-scale outflow dominates the H I\nkinematics within ~50 pkpc\, while in
fall and Hubble expansion dominate\nat >100 pkpc. For emission\, we obtain
deep integral field unit\nobservations on ~60 KBSS galaxies. Their Lya sp
ectra in the CGM are\ncompared to the galactic azimuthal angle. We find ex
cess Lya emission\nalong the galaxy major axis within ~30 pkpc. Similar te
chniques will\nbe used to study metal lines and the relationship between C
GM and\nother host-galaxy properties in the future.\n
DTSTART;TZID=America/New_York:20201005T123000
DTEND;TZID=America/New_York:20201005T140000
LAST-MODIFIED:20200930T143945Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-18
END:VEVENT
BEGIN:VEVENT
UID:f26d3998-df37-4a0a-951c-3ffe5632a825
DTSTAMP:20201203T104601Z
CREATED:20200922T142358Z
DESCRIPTION:Topic: Statistical Mechanics of Near-BPS Black Holes from N=4 J
T Supergravity\n\nSpeakers: Matthew Heydeman\n\nAffiliation: Princeton Uni
versity\; Member\, School of Natural Sciences\n\nA basic challenge for any
theory of quantum gravity is to provide a\nmicroscopic accounting of the
degrees of freedom and partition\nfunctions of black holes. In string theo
ry\, an exact count is possible\nwhen the Hawking temperature T=0\, which
corresponds to extremal\nReissner-Nordstrom black holes BPS protected by s
upersymmetry. What\nhappens for T>0 is less clear\, including whether ther
e is a mass gap\nseparating extremal and non-extremal states.\n\nExtremal
black holes have an AdS2 region\, and substantial progress in\nthe last fe
w years has been made on Jackiw-Teitelboim (JT) dilaton\ngravity\, which i
s an effective theory of nearly AdS2 spacetimes\nappropriate for low T>0.
It has been shown that JT is\, in some sense\,\nexactly solvable using an
AdS/CFT dual boundary theory known as the\nSchwarzian.\n\nIn this talk\, w
e will extend the AdS2 JT dynamics to the case\nappropriate for four-dimen
sional near-BPS black holes. Starting with\n4D N=2 supergravity\, we consi
der nearly AdS2 x S2 black holes with\nenhanced N=4 superconformal isometr
ies. The effective description is a\n2D N=4 supersymmetric extension of JT
gravity dual to a supersymmetric\nSchwarzian. The density of near-BPS sta
tes may be computed exactly in\nthis theory. Our results agree with genera
l arguments from string\ntheory and JT gravity\, and we find the supersymm
etry leads to a mass\ngap above extremality.\n
DTSTART;TZID=America/New_York:20201005T123000
DTEND;TZID=America/New_York:20201005T123000
LAST-MODIFIED:20201002T190101Z
LOCATION:via ZOOM
SUMMARY:Princeton University Gravity Initiative Lunch
URL:https://www.ias.edu/events/princeton-university-gravity-initiative-lunc
h-4
END:VEVENT
BEGIN:VEVENT
UID:8a502fe6-f27a-4f50-aeaa-23d23409e796
DTSTAMP:20201203T104601Z
CREATED:20200905T175759Z
DESCRIPTION:Topic: How to diagonalize a functor\n\nSpeakers: Benjamin Elias
\n\nAffiliation: University of Oregon\; von Neumann Fellow\, School of Mat
hematics\n\nVideo: Simonyi Hall 101 and Remote Access - see Zoom link belo
w\n\nDiagonalization is incredibly important in every field of mathematics
.\nI am a representation theorist\, so I will start by motivating the uses
\nof diagonalization in representation theory. Then comes a brief\nintrodu
ction to categorical representation theory\, which attempts to\nlift ideas
about (linear transformations acting on vectors in a vector\nspace) to (f
unctors acting on objects in a category). This will be\nused to motivate a
nd set expectations for a new construction:\ncategorical diagonalization.
Suppose you have an operator f whose\nminimal polynomial factors into line
ar terms\, with distinct roots\n$k_0$\, $k_1$\, through $k_r$. Then the pr
ojection $p_i$ to the\n$(k_i)$-th eigenspace can be described as a polynom
ial in f\, using a\ntechnique known as Lagrange interpolation. These idemp
otents equip the\nvector space with a decomposition into eigenspaces. We t
hink of the\nprocess of finding a complete family of orthogonal idempotent
s\n$\{p_i\}$ as the diagonalization of $f$. Here is categorical\ndiagonali
zation: given a functor $F$ with some additional data (akin\nto the collec
tion of scalars)\, we construct idempotent functors $P_i$.\nThese can be u
sed to equip the category with a filtration whose\nsubquotients are eigenc
ategories. This is all joint work with Matt\nHogancamp. The goal of this t
alk is not to explain all the details of\nthis construction\, but to outli
ne a lot of the key ideas\, and give the\nflavor of the field. We will fol
low a running example involving\nmodules over the group algebra $A$ of the
group of size 2\, that is $A\n= Z[x]/(x^2-1)$. If you know what a short e
xact sequence of\n$A$-modules is\, you should have all the needed prerequi
sites for this\ntalk. It also helps to know what a complex of A-modules is
\, and a\nhomotopy equivalence of such complexes. (If you know about coher
ent\nsheaves on projective space\, then you'll have a lot of fun ignoring
my\nlecture and thinking about how to diagonalize $O(1)$\; this is one\nto
pic in a beautiful paper by Gorsky-Negut-Rasmussen.)
DTSTART;TZID=America/New_York:20201005T140000
DTEND;TZID=America/New_York:20201005T150000
LAST-MODIFIED:20201103T045410Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-337
END:VEVENT
BEGIN:VEVENT
UID:7647625f-b6ad-4ad9-b520-7352b6656b89
DTSTAMP:20201203T104601Z
CREATED:20200924T152126Z
DESCRIPTION:Topic: Quantifying nonorientability and filling multiples of em
bedded curves\n\nSpeakers: Robert Young\n\nAffiliation: New York Universit
y\; von Neumann Fellow\, School of Mathematics\n\nVideo: Remote Access - s
ee Zoom link below\n\nFilling a curve with an oriented surface can sometim
es be 'cheaper by\nthe dozen'. For example\, L. C. Young constructed a smo
oth curve drawn\non a projective plane in $\mathbb R^n$ which is only abou
t 1.5 times\nas hard to fill twice as it is to fill once and asked whether
this\nratio can be bounded below. This phenomenon is based on the\nnonori
entability of the projective plane\; we will define a new\ninvariant that
measures how nonorientable a manifold is and bound it\nby decomposing surf
aces in $\mathbb R^n$ into uniformly rectifiable\npieces.
DTSTART;TZID=America/New_York:20201005T163000
DTEND;TZID=America/New_York:20201005T173000
LAST-MODIFIED:20201103T045434Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-120
END:VEVENT
BEGIN:VEVENT
UID:28d768a8-9fe7-47fc-997e-5068d188a45f
DTSTAMP:20201203T104601Z
CREATED:20200827T125431Z
DESCRIPTION:Topic: Simplified Lifting Theorems in Communication Complexity
via Sunflowers\n\nSpeakers: Toniann Pitassi\n\nAffiliation: University of
Toronto\; Visiting Professor\, School of Mathematics\n\nIn this talk I wil
l first motivate lifting theorems where lower bounds\non communication com
plexity for composed functions are obtained by a\ngeneral simulation theor
em\, essentially showing that no protocol can\ndo any better than the obvi
ous 'query' algorithm. I'll give a\nself-contained simplified proof of lif
ting which uses the sunflower\nlemma. The simplified proof is joint with S
hachar Lovett\, Raghu Meka\,\nIan Mertz\, and Jiapeng Zhang .\n
DTSTART;TZID=America/New_York:20201006T103000
DTEND;TZID=America/New_York:20201006T123000
LAST-MODIFIED:20201103T235549Z
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-456
END:VEVENT
BEGIN:VEVENT
UID:c3e133f8-c14d-4f5e-bce1-df9aecefd9d7
DTSTAMP:20201203T104601Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201006T123000
DTEND;TZID=America/New_York:20201006T133000
LAST-MODIFIED:20200910T165227Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-134
END:VEVENT
BEGIN:VEVENT
UID:ebf9c910-e096-4351-bb8f-d8e78707abc7
DTSTAMP:20201203T104601Z
CREATED:20201002T170052Z
DESCRIPTION:Topic: Introduction and overview\n\nSpeakers: Peter Haine\n\nAf
filiation: Massachusetts Institute of Technology\n\n
DTSTART;TZID=America/New_York:20201006T133000
DTEND;TZID=America/New_York:20201006T153000
LAST-MODIFIED:20201006T170228Z
LOCATION:Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/events/working-group-stratified-homotopy-theory
END:VEVENT
BEGIN:VEVENT
UID:a8bb21cd-e5cb-4223-a4d3-36b5be49cb2d
DTSTAMP:20201203T104601Z
CREATED:20201002T202730Z
DESCRIPTION:Topic: Finite groups as algebraic groups in non-defining charac
teristic\n\nSpeakers: Raphaël Rouquier\n\nAffiliation: University of Calif
ornia\, Los Angeles\; Member\, School of Mathematics\n\nVideo: Simonyi Hal
l 101 and Remote Access\n\nWe will discuss the conjecture of Broue relatin
g modular\nrepresentations of finite groups of Lie type in non-defining\nc
haracteristic to those of normalizers of Levi subgroups\, with a focus\non
$GL_n$. The categories of representations can be related to\n(quantized)
Hilbert schemes of points on surfaces and one obtains two\nvariable versio
ns of decomposition numbers.\n
DTSTART;TZID=America/New_York:20201007T150000
DTEND;TZID=America/New_York:20201007T170000
LAST-MODIFIED:20201030T014856Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory-3
END:VEVENT
BEGIN:VEVENT
UID:73ae819f-a722-48e6-86db-19235b006f1f
DTSTAMP:20201203T104601Z
CREATED:20200806T225120Z
DESCRIPTION:Topic: Robustness\, Verifiability and Privacy in ML\n\nSpeakers
: Shafi Goldwasser\n\nAffiliation: Simons Institute and University of Cali
fornia\, Berkeley\n\nCryptography and Machine Learning have shared a curio
us history: a\nscientific success for one often provided an example of an
impossible\ntask for the other. Today\, the goals of the two fields are al
igned.\nCryptographic models and tools can and should play a role in ensur
ing\nthe trustworthiness of AI and machine learning and address problems\n
such as privacy of training input\, model verification and robustness\nof
models to adversarial inputs. I will discuss three results along\nthese li
nes.
DTSTART;TZID=America/New_York:20201007T173000
DTEND;TZID=America/New_York:20201007T190000
LAST-MODIFIED:20201006T223159Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/events/mathematical-conversations-194
END:VEVENT
BEGIN:VEVENT
UID:4e207899-8e08-4f85-873b-0ec6510abcec
DTSTAMP:20201203T104601Z
CREATED:20200930T162205Z
DESCRIPTION:Topic: Factorization Algebras\n\nSpeakers: Jacob Lurie\n\nAffil
iation: Professor\, School of Mathematics\n\n
DTSTART;TZID=America/New_York:20201008T100000
DTEND;TZID=America/New_York:20201008T120000
LAST-MODIFIED:20201013T143850Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/events/moonshine-seminar-0
END:VEVENT
BEGIN:VEVENT
UID:327b546a-7614-4dea-9522-8500c54cc14b
DTSTAMP:20201203T104601Z
CREATED:20200708T174840Z
DESCRIPTION:Topic: Shock waves and gamma-ray bursts from neutron star merge
rs\n\nSpeakers: Andrei Beloborodov\n\nAffiliation: Columbia University\n\n
Neutron star merger GW 170817 was accompanied by a gamma-ray burst\nwith l
uminosity $L\sim 10^{47}$ erg/s\, coming with a ~2 s delay after\nthe grav
itational waves. Observations also indicate the presence of a\ndark\, ultr
a-relativistic envelope ejected promptly by the merger\,\nbefore the GRB e
mission. A plausible source of gamma-rays is a shock\nwave emerging at the
photosphere of the envelope. I will discuss the\nenvelope formation\, the
shock physics\, the mechanism of gamma-ray\nemission\, and its first-prin
ciple simulation. The simulation gives a\nGRB with a light curve and spect
ral evolution in agreement with\nobservations of GW 170817.\n
DTSTART;TZID=America/New_York:20201008T110000
DTEND;TZID=America/New_York:20201008T120000
LAST-MODIFIED:20201201T200407Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/events/institute-advanced-study-astrophysics-semina
r-276
END:VEVENT
BEGIN:VEVENT
UID:c7f38f02-9bb5-4816-8418-6b3a9370822c
DTSTAMP:20201203T104601Z
CREATED:20200920T141228Z
DESCRIPTION:Topic: Representations of p-adic groups and applications\n\nSpe
akers: Jessica Fintzen\n\nAffiliation: University of Cambridge and Duke Un
iversity\; Member\, School of Mathematics\n\nVideo: Remote Access - see Zo
om link below\n\nThe Langlands program is a far-reaching collection of con
jectures that\nrelate different areas of mathematics including number theo
ry and\nrepresentation theory. A fundamental problem on the representation
\ntheory side of the Langlands program is the construction of all\n(irredu
cible\, smooth\, complex) representations of p-adic groups.\n\nI will prov
ide an overview of our understanding of the representations\nof p-adic gro
ups\, with an emphasis on recent progress. I will also\noutline how new re
sults about the representation theory of p-adic\ngroups can be used to obt
ain congruences between arbitrary automorphic\nforms and automorphic forms
which are supercuspidal at p\, which is\njoint work with Sug Woo Shin. Th
is simplifies earlier constructions of\nattaching Galois representations t
o automorphic representations\, i.e.\nthe global Langlands correspondence\
, for general linear groups.\nMoreover\, our results apply to general p-ad
ic groups and have\ntherefore the potential to become widely applicable be
yond the case of\nthe general linear group.\n
DTSTART;TZID=America/New_York:20201008T140000
DTEND;TZID=America/New_York:20201008T150000
LAST-MODIFIED:20201012T224243Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-234
END:VEVENT
BEGIN:VEVENT
UID:e6594ca8-275e-4e85-ad08-290df9bdb75f
DTSTAMP:20201203T104601Z
CREATED:20200901T215501Z
DESCRIPTION:Topic: The Arnold conjecture\, spectral invariants and C^0 sym
plectic topology\n\nSpeakers: Lev Buhovsky\n\nAffiliation: Tel Aviv Univer
sity\n\nVideo: Remote Access - see Zoom link below\n\nThe Arnold conjectur
e about fixed points of Hamiltonian\ndiffeomorphisms was partly motivated
by the celebrated\nPoincare-Birkhoff fixed point theorem for an area-prese
rving\nhomeomorphism of an annulus in the plane. Despite the fact that the
\nArnold conjecture was formulated in he smooth setting\, several\nattempt
s to return to the continuous setting of homeomorphisms and to\nstudy the
conjecture in this setting has been made afterwards. In this\ntalk I will
describe some old and more recent results on the subject.\nBased on a join
t work with V. Humiliere and S. Seyfaddini.\n
DTSTART;TZID=America/New_York:20201009T091500
DTEND;TZID=America/New_York:20201009T104500
LAST-MODIFIED:20201012T224041Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-14
END:VEVENT
BEGIN:VEVENT
UID:b3bf7d48-ddfb-45e2-9805-97f6ac4ad73f
DTSTAMP:20201203T104601Z
CREATED:20200820T172436Z
DESCRIPTION:Topic: Parameters in indexed homology\n\nSpeakers: Simon Cho\n
\nAffiliation: University of Michigan\n\nVideo: Remote Access - see Zoom l
ink below\n\nMotivated by thematic similarities between persistent homolog
y and\nmagnitude homology\, we describe a simplicial construction associat
ed\nto a metric space. This construction is determined by (apart from the
\nmetric space itself) a choice of two parameters\, which we may take to\n
be real-valued. Applying homology pointwise\, we get persistent\nhomology
on one end of the possible choices of parameters\, and\nmagnitude homology
on the opposite end. Time permitting\, we describe\nsome modest applicati
ons of this perspective.\n
DTSTART;TZID=America/New_York:20201009T140000
DTEND;TZID=America/New_York:20201009T153000
LAST-MODIFIED:20201012T224139Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Workshop on Topology: Identifying Order in Complex Systems
URL:https://www.ias.edu/events/workshop-topology-identifying-order-complex-
systems-126
END:VEVENT
BEGIN:VEVENT
UID:e88e43bc-2251-4c43-ac60-ef6d8b71829b
DTSTAMP:20201203T104601Z
CREATED:20200909T161207Z
DESCRIPTION:Topic: Spatial and Kinematic Clustering of Stars in the Galacti
c Disk\n\nSpeakers: Discussion Leader: Harshil Kamdar \n\nAffiliation: Har
vard University\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;TZID=America/New_York:20201012T110000
DTEND;TZID=America/New_York:20201012T120000
LAST-MODIFIED:20201009T171836Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-33
END:VEVENT
BEGIN:VEVENT
UID:114ca6d3-e8ea-463b-b784-e1ab29df7179
DTSTAMP:20201203T104601Z
CREATED:20200827T131347Z
DESCRIPTION:Topic: Explicit near-fully X-Ramanujan graphs\n\nSpeakers: Xiny
u Wu\n\nAffiliation: Carnegie Mellon University\n\nVideo: Simonyi Hall 101
and Remote Access - see Zoom link below\n\nIn this talk I will introduce
constructions of finite graphs which\nresemble some given infinite graph b
oth in terms of their local\nneighborhoods\, and also their spectrum. Thes
e graphs can be thought of\nas expander graphs with local constraints in a
constant-sized\nneighborhood\, and generalize the notion of d-regular Ram
anujan graphs.\n\nFirst\, I will show how a 'recipe' in the form of some\n
matrix-coefficient non-commutative polynomial can be used to specify\nmany
infinite graphs\, including those arising from various graph\nproducts\,
and also generate finite graphs which are covered by the\ninfinite graph.
A recent landmark result of Bordenave and Collins\nimplies that for all su
ch graphs\, with high probability the finite\ngraphs generated with this r
ecipe also have their nontrivial spectrum\nclose to that of the infinite g
raph.\n\nNext\, I will talk about a derandomized form of this result: we p
rovide\na deterministic polynomial-time algorithm which\, for any X which
can\narise from a matrix-coefficient polynomial\, produces arbitrarily lar
ge\ngraphs G that are covered by X and have (nontrivial) spectrum at\nHaus
dorff distance at most eps from that of X.\n\nJoint work with Ryan O'Donne
ll.\n
DTSTART;TZID=America/New_York:20201012T111500
DTEND;TZID=America/New_York:20201012T121500
LAST-MODIFIED:20201103T235615Z
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-462
END:VEVENT
BEGIN:VEVENT
UID:159635d5-6b07-47cd-83aa-802c6b982218
DTSTAMP:20201203T104601Z
CREATED:20201009T182055Z
DESCRIPTION:Topic: TRAPPIST-1: Masses\, radii\, densities\, dynamics\, and
ephemerides\n\nSpeakers: Eric Agol\n\nAffiliation: University of Washingto
n\n\nWe have collected transit times for the TRAPPIST-1 system with the\nS
pitzer Space Telescope over four years. We add to these ground-based\,\nHS
T and K2 transit time measurements\, and revisit an N-body dynamical\nanal
ysis of the seven-planet system using our complete set of times\nfrom whic
h we refine the mass ratios of the planets to the star. We\nnext carry out
a photodynamical analysis of the Spitzer light curves\nto derive the dens
ity of the host star and the planet densities. We\nfind that all seven pla
nets' densities may be described with a single\nrocky mass-radius relation
which is depleted in iron relative to\nEarth\, with Fe 21 wt% versus 32 w
t% for Earth\, and otherwise\nEarth-like in composition. Alternatively\, t
he planets may have an\nEarth-like composition\, but enhanced in light ele
ments\, such as a\nsurface water layer or a core-free structure with oxidi
zed iron in the\nmantle. We measure planet masses to a precision of 3-5%\,
equivalent to\na radial-velocity (RV) precision of 2.5 cm/sec\, or two or
ders of\nmagnitude more precise than current RV capabilities. We find the
\neccentricities of the planets are very small\; the orbits are extremely
\ncoplanar\; and the system is stable on 10 Myr timescales. We find\nevide
nce of infrequent timing outliers which we cannot explain with an\neighth
planet\; we instead account for the outliers using a robust\nlikelihood fu
nction. We forecast JWST timing observations\, and\nspeculate on possible
implications of the planet densities for the\nformation\, migration and ev
olution of the planet system.\n
DTSTART;TZID=America/New_York:20201012T121500
DTEND;TZID=America/New_York:20201012T131500
LAST-MODIFIED:20201012T131809Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/events/princeton-university-exoplanet-discussion-gr
oup-51
END:VEVENT
BEGIN:VEVENT
UID:bbdb8bb1-945b-46fc-a615-3ebce4af67ed
DTSTAMP:20201203T104601Z
CREATED:20200921T145932Z
DESCRIPTION:Speakers: Xiao Fang\n\nAffiliation: University of Arizona\n\nSe
cond Speaker / Discussion Leader: Alice Pisani\, Princeton University\n
DTSTART;TZID=America/New_York:20201012T123000
DTEND;TZID=America/New_York:20201012T140000
LAST-MODIFIED:20201016T181818Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-19
END:VEVENT
BEGIN:VEVENT
UID:ad3fcfe2-53ff-4da1-bfb5-40fd08cae2b9
DTSTAMP:20201203T104601Z
CREATED:20200905T180738Z
DESCRIPTION:Topic: Stability\, non-approximated groups and high-dimensional
expanders\n\nSpeakers: Alexander Lubotzky\n\nAffiliation: Hebrew Universi
ty of Jerusalem\; Visiting Professor\, School of Mathematics\n\nVideo: Sim
onyi Hall 101 and Remote Access - see Zoom link below\n\nSeveral well-know
n open questions\, such as: 'are all groups sofic or\nhyperlinear?'\, have
a common form: can all groups be approximated by\nasymptotic homomorphism
s into the symmetric groups $Sym(n)$ (in the\nsofic case) or the unitary g
roups $U(n)$ (in the hyperlinear case)? In\nthe case of $U(n)$\, the quest
ion can be asked with respect to\ndifferent metrics and norms. We answer\,
for the first time\, some of\nthese versions\, showing that there exist f
initely presented groups\nwhich are not approximated by $U(n)$ with respec
t to the Frobenius\n(=$L_2$) norm and many other norms. The strategy is vi
a the notion of\n'stability': Some higher dimensional cohomology vanishing
phenomena is\nproven to imply stability. Using Garland method (a.k.a. hig
h\ndimensional expanders as quotients of Bruhat-Tits buildings) \, it is\n
shown that some non-residually-finite groups are stable and hence\ncannot
be approximated. These groups are central extensions of some\nlattices in
$p$-adic Lie groups (constructed via a $p$-adic version of\na result of De
ligne). All notions will be explained. Based on joint\nworks with M. De Ch
iffre\, L. Glebsky and A. Thom and with I.\nOppenheim.
DTSTART;TZID=America/New_York:20201012T140000
DTEND;TZID=America/New_York:20201012T150000
LAST-MODIFIED:20201103T045458Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-338
END:VEVENT
BEGIN:VEVENT
UID:5c5811d6-a292-4ac9-adb5-92dd2e39ea63
DTSTAMP:20201203T104601Z
CREATED:20200924T152911Z
DESCRIPTION:Topic: Towards universality of the nodal statistics on metric g
raphs\n\nSpeakers: Lior Alon\n\nAffiliation: Member\, School of Mathematic
s\n\nVideo: Simonyi Hall 101 and Remote Access - see Zoom link below\n\nTh
e study of nodal sets of Laplace eigenfunctions has intrigued many\nmathem
aticians over the years. The nodal count problem has its origins\nin the w
orks of Strum (1936) and Courant (1923) which led to questions\nthat remai
ned open to this day. One such question was the universal\nbehavior of the
nodal statistics. In 2002 Blum\, Gnutzmann and\nSmilansky observed numeri
cally that the statistical behaviors of the\n(properly rescaled) nodal cou
nt on planar billiards\, exhibit two types\nof behaviors. These behaviors
seemed to be independent of the specific\nshape of the billiards\, hence u
niversal\, and were determined by the\nsystem's classification to chaotic
or integrable. Proving this\nuniversality is still open.\n\nWe study an an
alog problem of nodal statistics on metric graphs. In\nthis talk\, I will
present a conjecture of a universal nodal statistics\nbehavior for metric
graphs and will provide new experimental and\nanalytic results supporting
the conjecture. I will describe our\nmethods of proof for certain families
of graphs\, exploiting the\nsymmetries of their secular manifolds.\n\nThi
s is a joint work with R. Band (Technion) and G. Berkolaiko (Texas\nA&M).
\n
DTSTART;TZID=America/New_York:20201012T163000
DTEND;TZID=America/New_York:20201012T173000
LAST-MODIFIED:20201103T045522Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-121
END:VEVENT
BEGIN:VEVENT
UID:a5537c36-32a1-4c3d-aed3-56a717fdffba
DTSTAMP:20201203T104601Z
CREATED:20200827T124355Z
DESCRIPTION:Topic: Arithmetic progressions and spectral structure\n\nSpeake
rs: Thomas Bloom\n\nAffiliation: University of Cambridge\n\nHow dense can
a set of integers be while containing no three-term\narithmetic progressio
ns? This is one of the classical problems of\nadditive combinatorics\, and
since the theorem of Roth in 1953 that\nsuch a set must have zero density
\, there has been much quantitative\nprogress in how quickly this density
must decay. \n\nIn the first half of the seminar\, I will give a survey of
the\nquantitative progress on Roth's theorem on three-term arithmetic\npr
ogressions\, culminating in the recent work of myself and Olof\nSisask\, t
hat in particular resolves the first non-trivial case of a\nfamous conject
ure of Erdős: if the sum of reciprocals diverges then A\nmust contain thre
e-term arithmetic progressions. I will give a\nhigh-level overview of the
proof of this new result\, which uses a\nblend of harmonic analysis and el
ementary combinatorial arguments.\n\nIn the second half of the seminar\, I
will discuss in depth one\nimportant component of our new proof: a struct
ural result for\nadditively non-smoothing sets. Roughly speaking\, a set i
s additively\nnon-smoothing when it grows under addition once\, but furthe
r addition\nreveals no extra structure. The first structural result for su
ch sets\nwas proved by Bateman and Katz in their work on the cap set probl
em.\nAn important part of my work with Olof Sisask was to prove a\nstructu
ral result of this kind for arbitrary groups (in particular for\nsubsets o
f the integers). In this talk I will sketch our proof of this\nstructural
result\, which uses only elementary methods\, and which\nshould have many
further applications in other problems of additive\ncombinatorics.\n
DTSTART;TZID=America/New_York:20201013T103000
DTEND;TZID=America/New_York:20201013T123000
LAST-MODIFIED:20201103T235642Z
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-457
END:VEVENT
BEGIN:VEVENT
UID:fd4bc87d-2b32-4630-8bc5-a878bc9a25bd
DTSTAMP:20201203T104601Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201013T123000
DTEND;TZID=America/New_York:20201013T133000
LAST-MODIFIED:20200910T165306Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-135
END:VEVENT
BEGIN:VEVENT
UID:687f3aef-c7d4-435b-8b5d-a6d97c24b6a7
DTSTAMP:20201203T104601Z
CREATED:20201002T172409Z
DESCRIPTION:Topic: Exodromy for stratified topological spaces (after MacPhe
rson)\n\nSpeakers: Remy van Dobben de Bruyn\n\nAffiliation: Institute for
Advanced Study and Princeton University\; Veblen Research Instructor\, Sch
ool of Mathematics\n\n
DTSTART;TZID=America/New_York:20201013T133000
DTEND;TZID=America/New_York:20201013T153000
LAST-MODIFIED:20201009T131019Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/events/working-group-stratified-homotopy-theory-0
END:VEVENT
BEGIN:VEVENT
UID:db77a7c9-a598-4ebb-ae1c-e161fab550c8
DTSTAMP:20201203T104601Z
CREATED:20200908T201106Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Valeria López-Fadul\n\nAffiliation: Wes
leyan University\, IAS\n\n
DTSTART;TZID=America/New_York:20201013T150000
DTEND;TZID=America/New_York:20201013T170000
LAST-MODIFIED:20200909T155749Z
LOCATION:Please note that this seminar will take place online via Zoom.
SUMMARY:Early Modern Europe Seminar
URL:https://www.ias.edu/events/early-modern-europe-seminar-0
END:VEVENT
BEGIN:VEVENT
UID:f61176bd-e2eb-4fa4-ae7f-657e514e1e48
DTSTAMP:20201203T104601Z
CREATED:20201006T181052Z
DESCRIPTION:Topic: The Antikythera Mechanism and Ancient Greek Astronomy\n
\nSpeakers: Alexander R. Jones\n\nAffiliation: New York University\n\n[ima
ges/Alexander_Jones.png]\n\nDR. ALEXANDER R. JONES OF NYU VIA ZOOM\n\nTHE
ANTIKYTHERA MECHANISM AND ANCIENT GREEK ASTRONOMY\n\nOCTOBER 13\, 2020\n\n
7:30 P.M.\n\nAMATEUR ASTRONOMERS ASSOCIATION OF PRINCETON IS INVITING YOU
TO A\nSCHEDULED ZOOM MEETING. THIS MEETING IS OPEN TO AAAP MEMBERS AND THE
\nPUBLIC. PLEASE MUTE YOURSELF IF NOT SPEAKING. LIMIT 100 PARTICIPANTS.\n
\nWe are planning to make use of chat for the Q&A session and are\nplannin
g on ways to reduce the background noise. To address background\nnoise\, w
e are going to follow the rules in the table below regarding\nthe audio. I
f the background noise gets to loud during Q&A or the\nBusiness Meeting we
will Mute All.\n\n[images/zoom_meeting.png]\n\nOnly the Business part of
the meeting will be locked.\n\nFEATURED SPEAKER: Dr. Alexander R. Jones of
NYU will give a talk on\nTHE ANTIKYTHERA MECHANISM AND ANCIENT GREEK ASTR
ONOMY. The Antikythera\nMechanism was a complex geared 'tabletop' instrume
nt that was lost in\na shipwreck off the Greek island of Antikythera about
60 BC\, and\nrecovered in corroded fragments in 1901. It was recognized a
lmost at\nonce as having something to do with astronomy. After three major
\ncampaigns of research since 1958\, we now know a great deal about its\nf
unctions and can describe it as a device for displaying coordinated\ncycle
s of time and astronomical phenomena simulated at an accelerated\nrate of
time. This talk will focus on how the Mechanism fits within\nand expands w
hat we know about ancient Greek astronomy.\n\nUSING ZOOM: While we are\, s
ocial distancing AAAP has chosen to use\nZoom based our belief that many h
ave already used it and its ease of\nlearning. One of its great features i
s you can choose whether you want\nto install the software on your compute
r or use it within your\nbrowser.\n\nHOW TO JOIN THE SEPTEMBER MEETING: Fo
r the meeting\, we are going to\nfollow a simple two-step process:\n\n 1.
Please make sure you have Zoom installed on your computer. YOU\nDO NOT NEE
D A ZOOM ACCOUNT OR NEED TO CREATE ONE TO JOIN THE MEETING.\nNOR ARE YOU R
EQUIRED TO USE A WEBCAM.\n\n 2. The link to the meeting is --\n https://z
oom.us/j/92658101641?pwd=QkNVb285NHVFdVNJY0gwWkVSQ3llUT09\n[https://zoom.u
s/j/92658101641?pwd=QkNVb285NHVFdVNJY0gwWkVSQ3llUT09]\n\n Meeting ID: 926
5810 1641\n Passcode: 521428\n\nNOTE: The meeting room will open at 7:00
PM. You will be placed in the\nwaiting room until the speaker has joined
us. If you do not have Zoom\ninstalled on your computer. tablet\, or phone
\, it will be automatically\ninstalled when your join the meeting unless y
ou choose the browser\noption.\n\nIf you click on the meeting link and it
doesn’t work\, simply copy\nand paste it into your browser.\n\nMORE INFORM
ATION ON ZOOM: The Zoom site has many training videos most\nare for people
who are hosting a meeting. If you’re unsure how Zoom\nworks you might wan
t to view the videos on how to join a meeting\n[https://support.zoom.us/hc
/en-us/articles/201362193] or how to check\nyour computer’s audio and vide
o\n[https://support.zoom.us/hc/en-us/articles/201362283-How-Do-I-Join-or-T
est-My-Computer-Audio-]\nbefore the meeting.\n\nLooking forward to you joi
ning us on Zoom at the October meeting!\n\nIra Polans\,\nProgram Chair\n
DTSTART;TZID=America/New_York:20201013T193000
DTEND;TZID=America/New_York:20201013T213000
LAST-MODIFIED:20201029T141217Z
LOCATION:Virtual Event via Zoom
SUMMARY:Amateur Astronomers Association of Princeton (AAAP) Monthly Meeting
URL:https://www.ias.edu/events/amateur-astronomers-association-princeton-aa
ap-monthly-meeting
END:VEVENT
BEGIN:VEVENT
UID:93149cd7-f607-49eb-8bc4-d1a7cd64a770
DTSTAMP:20201203T104601Z
CREATED:20200827T202621Z
DESCRIPTION:Topic: Introduction to stability and testability\n\nSpeakers: A
lexander Lubotzky\n\nAffiliation: Hebrew University of Jerusalem\; Visitin
g Professor\, School of Mathematics\n\nThe talk will be an introduction an
d a road map to the various\nconnections the topic has with other areas of
math and CS.\n
DTSTART;TZID=America/New_York:20201014T110000
DTEND;TZID=America/New_York:20201014T121500
LAST-MODIFIED:20201013T231059Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Stability and Testability
URL:https://www.ias.edu/events/stability-and-testability
END:VEVENT
BEGIN:VEVENT
UID:bbd0dc84-fcec-44a9-8c30-1bb00153c1c7
DTSTAMP:20201203T104601Z
CREATED:20201008T193732Z
DESCRIPTION:Topic: An introduction to affine Grassmanians and the geometric
Satake equivalence\n\nSpeakers: Jize Yu\n\nAffiliation: Member\, School o
f Mathematics\n\nThis is the first talk in a series of three talks towards
\nunderstanding Bezrukavnikov-Finkelberg's derived geometric Satake\nequiv
alence. In this talk\, we recall the geometry of equal\ncharacteristic aff
ine Grassmannians and some of the ingredients of\nproving the geometric Sa
take equivalence in this setting.\n
DTSTART;TZID=America/New_York:20201014T150000
DTEND;TZID=America/New_York:20201014T170000
LAST-MODIFIED:20201030T014907Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory-4
END:VEVENT
BEGIN:VEVENT
UID:9ce54a02-837d-413b-91a9-1366b7a4751f
DTSTAMP:20201203T104601Z
CREATED:20200806T225404Z
DESCRIPTION:Topic: Peg problems\n\nSpeakers: Joshua Greene\n\nAffiliation:
Boston College\n\nI will discuss a little about the context and solution o
f the\nrectangular peg problem: for every smooth Jordan curve and rectangl
e\nin the Euclidean plane\, one can place four points on the curve at the
\nvertices of a rectangle similar to the one given. The solution\ninvolves
symplectic geometry in a surprising way. Joint work with\nAndrew Lobb.\n
DTSTART;TZID=America/New_York:20201014T173000
DTEND;TZID=America/New_York:20201014T190000
LAST-MODIFIED:20201014T220638Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/events/mathematical-conversations-195
END:VEVENT
BEGIN:VEVENT
UID:031085e0-f3b2-48e1-acfc-55b16f4dab8f
DTSTAMP:20201203T104601Z
CREATED:20201009T161249Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201015T100000
DTEND;TZID=America/New_York:20201015T120000
LAST-MODIFIED:20201015T175710Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/events/moonshine-seminar-1
END:VEVENT
BEGIN:VEVENT
UID:30ebee33-e9d1-4474-b5f0-793db2fea6b8
DTSTAMP:20201203T104601Z
CREATED:20200708T174911Z
DESCRIPTION:Topic: Binary star evolution: a multi-wavelength\, multi-messen
ger puzzle\n\nSpeakers: Katelyn Breivik\n\nAffiliation: Flatiron Institute
\n\nRecent observations of binary black hole and binary neutron star\nmerg
ers have ignited interest in the formation and evolution of\ncompact-objec
t binary systems. However\, by the time a compact-object\nbinary merges an
d produces gravitational-wave/electromagnetic signals\nwe can observe\, mu
ch of the evolutionary history of the stellar\nprogenitors is washed away.
By combining binary population synthesis\nsimulations with observations\,
we can constrain the uncertain\nprocesses that govern the evolution of bi
nary stars from zero age main\nsequence through to compact object formatio
n. In this talk I will\nintroduce an openly developed population synthesis
code: COSMIC and\nhighlight some recent work which explores how to combin
e binary\npopulation simulations with future data from gravitational wave
and\nelectromagnetic surveys to constrain the formation and evolution of\n
compact-object binaries.\n
DTSTART;TZID=America/New_York:20201015T110000
DTEND;TZID=America/New_York:20201015T120000
LAST-MODIFIED:20201201T200407Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/events/institute-advanced-study-astrophysics-semina
r-277
END:VEVENT
BEGIN:VEVENT
UID:d89c0942-cede-4541-a467-89bf7e7a9f82
DTSTAMP:20201203T104601Z
CREATED:20200923T155953Z
DESCRIPTION:Topic: Heights and dynamics over arbitrary fields\n\nSpeakers:
Carney Alexander\n\nAffiliation: University of Rochester\n\nClassically\,
heights are defined over number fields or transcendence\ndegree one functi
on fields. This is so that the Northcott property\,\nwhich says that sets
of points with bounded height are finite\, holds.\nHere\, expanding on wor
k of Moriwaki and Yuan-Zhang\, we show how to\ndefine arithmetic intersect
ions and heights relative to any finitely\ngenerated field extension $K/k$
\, and construct canonical heights for\npolarizable arithmetic dynamical s
ystems $f:X \to X$. These heights\nhave a corresponding Northcott property
when $k$ is $\mathbb Q$ or\n$F_q$. When $k$ is larger\, we show that Nort
hcott for canonical\nheights is conditional on the non-isotriviality of $f
: X \to X$\,\ngeneralizing work of Lang-Neron\, Baker\, and Chatzidakis-H
rushovski.\nAdditionally\, we prove the Hodge Index Theorem for arithmetic
\nintersections relative to $K/k$. Since\, when Northcott holds\,\npreperi
odic points are the same as height zero points\, this has\napplications to
dynamical systems. By the Lefschetz principle\, these\nresults can be app
lied over any field.
DTSTART;TZID=America/New_York:20201015T163000
DTEND;TZID=America/New_York:20201015T173000
LAST-MODIFIED:20201017T010637Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-235
END:VEVENT
BEGIN:VEVENT
UID:c2cd3938-0513-45a4-b9a0-eab70a230133
DTSTAMP:20201203T104601Z
CREATED:20200901T215521Z
DESCRIPTION:Topic: Mirror symmetry for chain type polynomials\n\nSpeakers:
Umut Varolgunes\n\nAffiliation: Stanford University\n\nI will start by exp
laining Takahashi's homological mirror symmetry\n(HMS) conjecture regardin
g invertible polynomials\, which is an open\nstring reinterpretation of Be
rglund-Hubsch-Henningson mirror symmetry.\nIn joint work with A. Polishchu
k\, we resolved this HMS conjecture in\nthe chain type case up to rigorous
proofs of general statements about\nFukaya-Seidel categories. Our proof g
oes by showing that the\ncategories in both sides are obtained from the ca
tegory Vect(k) by\napplying a recursion. I will explain this recursion cat
egorically and\nsketch the argument for why it is satisfied on the A-side
assuming the\naforementioned foundational results. If time permits\, I wil
l also\nmention what goes into the proof in the B-side.\n
DTSTART;TZID=America/New_York:20201016T091500
DTEND;TZID=America/New_York:20201016T104500
LAST-MODIFIED:20201012T214058Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-15
END:VEVENT
BEGIN:VEVENT
UID:a94cbc08-8e74-4f78-bfbb-5df0d501dc6b
DTSTAMP:20201203T104601Z
CREATED:20201013T131746Z
DESCRIPTION:Topic: Classical modifications to Einstein's General Relativity
around black holes\n\nSpeakers: Justin Ripley\n\nAffiliation: University
of Cambridge\n\nThis week\, Justin Ripley (DAMTP\, University of Cambridge
)\, a former\ngraduate student of Frans Pretorius'\, will introduce us to
some of the\nnumerical relativity group's research interests. In particula
r\, Justin\nwill present some of his recent work on modified gravity aroun
d black\nholes: In this talk I will discuss recent work on the dynamics of
\nblack holes in Einstein dilaton Gauss-Bonnet (EDGB) gravity. This\nmodif
ied gravity theory can be motivated by effective field theory\nreasoning\,
and admits scalarized black hole solutions. These two facts\nmake it an i
nteresting candidate theory to constrain using binary\nblack hole\, gravit
ational wave observations. Additionally\, EDGB is a\nrepresentative member
of the Horndeski theories\, which have been\ninvoked over the years to mo
del the dynamics of the early universe\,\nincluding inflationary and bounc
ing cosmologies. I will discuss why it\nhas been hard to construct nontriv
ial dynamical solutions to EDGB\ngravity\, how recent advances have made i
t possible to construct\ninteresting solutions to the theory\, and future
directions for\nresearch\, including applications to early and late univer
se cosmology.
DTSTART;TZID=America/New_York:20201016T120000
DTEND;TZID=America/New_York:20201016T130000
LAST-MODIFIED:20201013T131746Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Lunch Seminar
URL:https://www.ias.edu/events/princeton-university-gravity-group-lunch-sem
inar-41
END:VEVENT
BEGIN:VEVENT
UID:c3c1bfb1-f9fc-42a2-aacf-d3c7c66a9c78
DTSTAMP:20201203T104601Z
CREATED:20201009T191041Z
DESCRIPTION:Topic: A new look at nonlinear evolution of Alfven waves in neu
tron star magnetospheres\n\nSpeakers: Yajie Yuan\n\nAffiliation: Center fo
r Computational Astrophysics\, Flatiron Institute\n\nYoung and active neut
ron stars may experience star quakes that can\nlaunch kHz Alfven waves int
o the magnetosphere. An Alfven wave packet\npropagating along the closed f
ield lines undergoes several interesting\nnonlinear processes: (1) the Alf
ven wave can convert to fast\nmagnetosonic waves that leave the magnetosph
ere\; (2) the Alfven wave\npacket gets sheared due to the different length
s of neighboring field\nlines\, leading to enhanced current that triggers
kinetic\ninstabilities\; (3) Alfven waves propagating to the outer magneto
sphere\nmay break and form 'plasmoids' (closed field loops) that accelerat
e\naway from the star. Most interestingly\, the third process may be a\nvi
able mechanism to produce the simultaneous X-ray bursts and fast\nradio bu
rsts from the galactic magnetar SGR 1935+2154. In this talk\,\nI'll presen
t our systematic study of all three processes and discuss\ntheir observati
onal consequences.
DTSTART;TZID=America/New_York:20201016T123000
DTEND;TZID=America/New_York:20201016T133000
LAST-MODIFIED:20201009T191041Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/events/princeton-university-astroplasmas-seminar-96
END:VEVENT
BEGIN:VEVENT
UID:7a37ccd8-1468-4f04-9a9b-46eb6df812d4
DTSTAMP:20201203T104601Z
CREATED:20201005T131216Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART;TZID=America/New_York:20201016T150000
DTEND;TZID=America/New_York:20201016T160000
LAST-MODIFIED:20201005T131216Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/events/princeton-university-hsc-group-discussion-15
4
END:VEVENT
BEGIN:VEVENT
UID:75e694a1-20b6-42b2-b12f-8558624b2658
DTSTAMP:20201203T104601Z
CREATED:20200909T161259Z
DESCRIPTION:Topic: Milky Way Satellite Census. II. Galaxy--Halo Connection
Constraints Including the Impact of the Large Magellanic Cloud\n\nSpeakers
: Discussion Leader: Ethan Nadler\n\nAffiliation: Stanford University\n\nE
ach week\, we hold a relatively informal seminar/discussion series\nwith a
n emphasis on extra-galactic and large-scale structure\nastrophysics.\n\nD
uring 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 gues
t 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 discu
ssions are very friendly and\ninteractive.\n
DTSTART;TZID=America/New_York:20201019T110000
DTEND;TZID=America/New_York:20201019T120000
LAST-MODIFIED:20201016T181024Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-34
END:VEVENT
BEGIN:VEVENT
UID:cb4e091a-f8f1-45e2-acab-a8f531aecb91
DTSTAMP:20201203T104601Z
CREATED:20200827T124710Z
DESCRIPTION:Topic: A Parallel Repetition Theorem for the GHZ Game\n\nSpeake
rs: Justin Holmgren\n\nAffiliation: Massachusetts Institute of Technology
\n\nWe prove that parallel repetition of the (3-player) GHZ game reduces\n
the value of the game polynomially fast to 0. That is\, the value of\nthe
GHZ game repeated in parallel t times is at most $t^{-\Omega(1)}.\nPreviou
sly\, only a bound of roughly 1 / alpha(t)\, where alpha is the\ninverse A
ckermann function\, was known.\n\nThe GHZ game was recently identified by
Dinur\, Harsha\, Venkat and Yuen\nas a multi-player game where all existin
g techniques for proving\nstrong bounds on the value of the parallel repet
ition of the game\nfail. Indeed\, to prove our result we use a completely
new proof\ntechnique. Dinur et al. speculated that progress on bounding th
e value\nof the parallel repetition of the GHZ game may lead to further\np
rogress on the general question of parallel repetition of\nmulti-player ga
mes. They suggested that the strong correlations\npresent in the GHZ quest
ion distribution represent the ``hardest\ninstance'' of the multi-player p
arallel repetition problem.\n\nAnother motivation for studying the paralle
l repetition of the GHZ\ngame comes from the field of quantum information.
The GHZ game\, first\nintroduced by Greenberger\, Horne and Zeilinger\, i
s a central game in\nthe study of quantum entanglement and has been studie
d in numerous\nworks. For example\, it is used for testing quantum entangl
ement and\nfor device-independent quantum cryptography. In such applicatio
ns a\ngame is typically repeated to reduce the probability of error\, and
\nhence bounds on the value of the parallel repetition of the game may\nbe
useful.\n
DTSTART;TZID=America/New_York:20201019T111500
DTEND;TZID=America/New_York:20201019T121500
LAST-MODIFIED:20201103T235705Z
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-463
END:VEVENT
BEGIN:VEVENT
UID:e80183c9-27d9-4f5c-aad1-3eacffbe4bdd
DTSTAMP:20201203T104601Z
CREATED:20201016T181553Z
DESCRIPTION:Topic: Ultra-Hot Jupiters: Revealing the Atmospheres of a Novel
Class of Exoplanets\n\nSpeakers: Megan Mansfield\n\nAffiliation: Universi
ty of Chicago\n\nHot Jupiters are compelling targets for thermal emission
observations\nbecause their high signal-to-noise allows precise atmospheri
c\ncharacterization. Theory originally predicted that cooler planets\nwoul
d show absorption features in their secondary eclipse spectra due\nto havi
ng uninverted atmospheres\, while warmer planets would have\ninverted atmo
spheres causing emission features in their eclipse\nspectra. I first discu
ss our group’s early observations of ultra-hot\nJupiters\, which led to th
e realization that these hottest exoplanets\nare a distinct class with uni
que high-temperature chemistry. I present\nnew models which take into acco
unt this new high-temperature\nchemistry\, and show how they can explain t
he featureless spectra we\nobserve in many ultra-hot Jupiters. However\, o
bserved hot Jupiters\nstill show a surprising level of diversity in their
eclipse spectra.\nTo further examine this diversity\, I perform a populati
on study of all\nsecondary eclipse observations of hot Jupiters with the H
ubble Space\nTelescope (HST). From this population study I propose that th
e spectra\nof hot Jupiters can be explained through compositional diversit
y in\ntheir atmospheres.\n\nIn the coming years we will have the opportuni
ty to study hot Jupiter\natmospheres in even more detail using the James W
ebb Space Telescope\n(JWST). In particular\, JWST will provide the unique
capability to\nperform spectroscopic eclipse mapping\, which will allow us
to map the\natmospheres of hot Jupiters in three dimensions (latitude\, l
ongitude\,\nand altitude). I present a new method to analyze eclipse mappi
ng\nobservations which can be used to interpret these complicated data\nse
ts without relying on expectations from circulation models. Finally\,\nI d
iscuss ongoing observations of hot Jupiters which I will be leading\nin th
e coming year using both HST and ground-based high-resolution\nobservation
s.\n
DTSTART;TZID=America/New_York:20201019T121500
DTEND;TZID=America/New_York:20201019T131500
LAST-MODIFIED:20201019T135326Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/events/princeton-university-exoplanet-discussion-gr
oup-52
END:VEVENT
BEGIN:VEVENT
UID:10ca020a-7e36-46f4-be45-bb458b7daf42
DTSTAMP:20201203T104601Z
CREATED:20200921T150156Z
DESCRIPTION:Topic: Cosmological constraints from a joint analysis of cluste
r abundances\, galaxy correlations\, and weak gravitational lensing in the
Dark Energy Survey\n\nSpeakers: Chun-Hao To\n\nAffiliation: Stanford Univ
ersity\n\nThree cosmic tracer fields are measured from imaging surveys: ga
laxy\ndensity\, weak gravitation lensing shear\, and cluster density. The
\njoint analysis of the auto and cross correlations of the first two\nfiel
ds\, often referred to as the 3x2pt analysis\, has become a popular\nand c
ompetitive cosmological test of the standard cosmological model.\nThe abun
dances and spatial distributions of galaxy clusters\, which are\nassociate
d with the highest peaks in the matter density field\, provide\nanother po
werful probe of cosmic structure formation and evolution\;\nthus\, the com
bination of cluster abundances and 3x2pt analysis is\nexpected to yield pr
ecise cosmological constraints. In this talk\, I\nwill describe a novel mu
lti-probe cluster cosmology analysis\, which\nfocuses exclusively on large
scales. This new cluster cosmology\nanalysis yields competitive cosmologi
cal constraints while being\nrobust against several systematics. I will th
en present cosmological\nconstraints from the first joint analysis of clus
ter abundances and\nauto/cross correlations of all three cosmic tracer fie
lds measured\nfrom the first year of the Dark Energy Survey (DESY1). The t
alk will\nbe concluded by a discussion on the implication of the result\,
\npotential improvements\, and expected constraining powers in the\nup-com
ing DESY3 analysis and future wide imaging surveys.\n
DTSTART;TZID=America/New_York:20201019T123000
DTEND;TZID=America/New_York:20201019T140000
LAST-MODIFIED:20201014T130448Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-20
END:VEVENT
BEGIN:VEVENT
UID:a4b72739-64f5-4c8d-bb2a-e18dfa6b06ec
DTSTAMP:20201203T104601Z
CREATED:20200922T142514Z
DESCRIPTION:Topic: Gravitational Test beyond the First Post-Newtonian Order
with the EHT\n\nSpeakers: Lia Medeiros\n\nAffiliation: Member\, School of
Natural Sciences\n\nOur current understanding of black holes assumes that
they are\ndescribed by the Kerr solution to Einstein's equations. On Apri
l 10\,\n2019\, the Event Horizon Telescope (EHT)\, released the first imag
e of a\nblack hole resolved to event horizon scales and the first measurem
ent\nof the size of a black-hole shadow. In October of 2020 we published a
\nnew test of general relativity at the 2PN order based on this\nmeasureme
nt. I will discuss how we can use the Event Horizon Telescope\nto test the
Kerr nature of black holes\, both with this first image and\nin the futur
e.\n
DTSTART;TZID=America/New_York:20201019T123000
DTEND;TZID=America/New_York:20201019T123000
LAST-MODIFIED:20201009T182950Z
LOCATION:via ZOOM
SUMMARY:Princeton University Gravity Initiative Lunch
URL:https://www.ias.edu/events/princeton-university-gravity-initiative-lunc
h-5
END:VEVENT
BEGIN:VEVENT
UID:19bb21fe-0dae-46f2-abb0-df8d25efce53
DTSTAMP:20201203T104601Z
CREATED:20200905T181018Z
DESCRIPTION:Topic: Log-concavity\, matroids and expanders\n\nSpeakers: Cynt
hia Vinzant\n\nAffiliation: North Carolina State University\; von Neumann
Fellow\, School of Mathematics\n\nMatroids are combinatorial objects that
model various types of\nindependence. They appear several fields mathemati
cs\, including graph\ntheory\, combinatorial optimization\, and algebraic
geometry. In this\ntalk\, I will introduce the theory of matroids along wi
th the closely\nrelated class of polynomials called strongly log-concave p
olynomials.\nStrong log-concavity is a functional property of a real multi
variate\npolynomial that translates to useful conditions on its coefficien
ts.\nClosed related classes are real stable and Lorentzian polynomials.\nD
iscrete probability distributions defined by these coefficients\ninherit s
everal of these nice properties. I will discuss the beautiful\nreal and co
mbinatorial geometry underlying these polynomials and\ndescribe applicatio
ns to random walks on the faces of simplicial\ncomplexes. This is based on
joint work with Nima Anari\, Kuikui Liu\,\nand Shayan Oveis Gharan.\n
DTSTART;TZID=America/New_York:20201019T140000
DTEND;TZID=America/New_York:20201019T150000
LAST-MODIFIED:20201103T045545Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-339
END:VEVENT
BEGIN:VEVENT
UID:3ae00c7f-8e7e-4b52-86b8-22ca984a887f
DTSTAMP:20201203T104601Z
CREATED:20200925T221659Z
DESCRIPTION:Topic: Spectral Statistics of Lévy Matrices\n\nSpeakers: Patric
k Lopatto\n\nAffiliation: Member\, School of Mathematics\n\nLévy matrices
are symmetric random matrices whose entries are\nindependent alpha-stable
laws. Such distributions have infinite\nvariance\, and when alpha is less
than 1\, infinite mean. In the latter\ncase these matrices are conjectured
to exhibit a sharp transition from\na delocalized regime at low energy to
a localized regime at high\nenergy\, like the infamous Anderson model in
mathematical physics. We\ndiscuss work establishing the existence of a del
ocalized regime with\nGOE eigenvalue statistics. Further\, we characterize
the eigenvector\nstatistics in this regime and find they display novel\,
non-Gaussian\nbehavior.\n\nThis talk describes joint works with Amol Aggar
wal\, Jake Marcinek\, and\nHorng-Tzer Yau.\n
DTSTART;TZID=America/New_York:20201019T163000
DTEND;TZID=America/New_York:20201019T173000
LAST-MODIFIED:20201103T045608Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-122
END:VEVENT
BEGIN:VEVENT
UID:acdf1bf1-bfc5-4679-b8dd-e255c522972c
DTSTAMP:20201203T104601Z
CREATED:20200827T131806Z
DESCRIPTION:Topic: The threshold for the square of a Hamilton cycle\n\nSpea
kers: Jinyoung Park\n\nAffiliation: Member\, School of Mathematics\n\nWe w
ill talk about a recent result of Jeff Kahn\, Bhargav Narayanan\,\nand mys
elf stating that the threshold for the random graph G(n\,p) to\ncontain th
e square of a Hamilton cycle is 1/sqrt n\, resolving a\nconjecture of Kühn
and Osthus from 2012. For context\, we will first\nspend some time discus
sing a recent result of Keith Frankston and the\nthree aforementioned auth
ors on a conjecture of Talagrand (a\nfractional version of Kahn-Kalai 'exp
ectation-threshold conjecture').\n
DTSTART;TZID=America/New_York:20201020T103000
DTEND;TZID=America/New_York:20201020T123000
LAST-MODIFIED:20201103T235729Z
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-458
END:VEVENT
BEGIN:VEVENT
UID:603b7610-56d4-4c62-94b8-50ac0be8ebf9
DTSTAMP:20201203T104601Z
CREATED:20201016T183302Z
DESCRIPTION:Topic: NO LUNCH - FALL RECESS\n\n
DTSTART;TZID=America/New_York:20201020T123000
DTEND;TZID=America/New_York:20201020T133000
LAST-MODIFIED:20201016T183302Z
LOCATION:
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-163
END:VEVENT
BEGIN:VEVENT
UID:593883ff-b599-4149-a720-6622a3f80e60
DTSTAMP:20201203T104601Z
CREATED:20201002T172417Z
DESCRIPTION:Topic: Model categories and simplicial homotopy theory\n\nSpeak
ers: Charles Weibel\n\nAffiliation: Rutgers University\; Member\, School o
f Mathematics\n\n
DTSTART;TZID=America/New_York:20201020T133000
DTEND;TZID=America/New_York:20201020T153000
LAST-MODIFIED:20201013T215756Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/events/working-group-stratified-homotopy-theory-1
END:VEVENT
BEGIN:VEVENT
UID:bdef6eb9-2dbe-4316-99e1-3fd3cf0bfbfd
DTSTAMP:20201203T104601Z
CREATED:20201016T142442Z
DESCRIPTION:Topic: Representations of GL_2(F_q) in defining characteristic:
a number-theorist's perspective\n\nSpeakers: Matthew Emerton\n\nAffiliati
on: University of Chicago\n\nIn this talk I hope to explain how the repres
entation theory of\n$GL_n(F_q)$ (with q being a power of p) in char. p\, a
nd also in mixed\ncharacteristic $(0\,p)$\, plays an important role in the
theory of\nGalois representations and the Langlands program. The case of
\n$GL_2(F_q)$ is already very interesting\, and I will focus on that\ncase
(but will also try to indicate what is general to $GL_n$\, and what\nis sp
ecial to the $GL_2$ case).There is a key method in number-theory\,\ncalled
patching (due to Taylor--Wiles and Kisin)\, which is at the\nbasis of the
connection. In my talk\, I *won't* really try to explain\nwhere this come
s from (that would take us away from rep. theory and\ninto the thick of th
e arithmetic theory of automorphic forms)\, but\n*will* instead focus on t
he axiomatic structures that come out of the\nmethod (``patching functors'
'). A priori there are lots of patching\nfunctors\, but we can hope that a
ctually there is only one of them\n(i.e. that all patching functors are na
turally isomorphic). For reps.\nof $GL_2(F_q)\,$ this is more-or-less prov
ed (as I will try to\nexplain)\, via results of Le--Morra--Schraen/Hu--Wan
g/Le/Dotto--Le\;\nnevertheless\, in some sense we don't really understand
*why* it's true\n(as is the case for many results in the Langlands program
!)\, and there\nare lots of surprising\, seemingly coincidental\, phenomen
a for which we\nwould like to have conceptual explanations. The study of p
atching\nfunctors uses a mixture of rep'n theory and number-theoretic meth
ods.\nI will explain some of the key rep'n theoretic input\, and also expl
ain\nwhat else we would like to know about the rep'n theory\, which might
\nhelp shed more light on the structure and meaning of patching\nfunctors.
\n
DTSTART;TZID=America/New_York:20201020T170000
DTEND;TZID=America/New_York:20201020T180000
LAST-MODIFIED:20201030T132622Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar
END:VEVENT
BEGIN:VEVENT
UID:846da2d9-70da-4846-915d-0a35cbfc87d7
DTSTAMP:20201203T104601Z
CREATED:20200901T214334Z
DESCRIPTION:Topic: Stability and testability - a computational perspective
\n\nSpeakers: Jonathan Mosheiff\n\nAffiliation: Carnegie Mellon University
\n\nIn this talk we survey the recent connection (a joint work with Becker
\nand Lubotzky) between certain group theoretic notions related to\nstabil
ity\, and a novel class of problems from the realm of _property\ntesting._
Consider the computational problem where we are given a\ntuple of permuta
tions in $Sym(n)$\, and wish to determine whether these\npermutations sati
sfy a certain system of equations $E$. We say that\n$E$ is _testable_ if t
here is an algorithm (called a _tester_) that\nqueries only a constant num
ber of entries of the given permutations\,\nand probabilistically distingu
ishes between the case where the\npermutations satisfy $E$\, and the case
in which they are epsilon-far\nfrom any tuple of permutations satisfying $
E$. Note that in our\ndefinition of this problem we depart from the more c
lassical setting\nof property testing\, where the object to be tested is e
ither a\nfunction or a graph. We observe an intriguing connection between
the\ngroup presented by $E$\, which we denote $G$\, and the above\ncomputa
tional problem. It turns out that $G$ is stable if and only if\na certain
natural algorithm is a tester for $E$. Thus\, established\nresults about t
he stability of certain groups yield testers for\ncorresponding systems of
equations. Further exploring this connection\,\nwe discover that the test
ability of $E$ can be fully characterized in\nterms of the group $G$. Stud
ying this characterization yields both\npositive and negative results. For
example\, amenability of $G$ implies\nthat $E$ is testable. On the other
hand\, if $G$ has property (T) and\nfinite quotients of unbounded cardinal
ity\, then $E$ is not testable.\nWe conclude by presenting some natural op
en questions motivated by\nthis work.\n
DTSTART;TZID=America/New_York:20201021T110000
DTEND;TZID=America/New_York:20201021T121500
LAST-MODIFIED:20201105T002612Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Stability and Testability
URL:https://www.ias.edu/events/stability-and-testability-0
END:VEVENT
BEGIN:VEVENT
UID:fedf62f5-ce32-4c77-8187-9cc1fb503f13
DTSTAMP:20201203T104601Z
CREATED:20200915T160820Z
DESCRIPTION:Topic: Maghribi Theology in Manuscript: Reason\, Belief\, and t
he Common Folk\n\nSpeakers: Caitlyn Olson and Jan Thiele\n\nAffiliation: H
arvard University and CSIC\, Madrid\n\nThe history of Islamic theology in
the Maghrib is an understudied\nfield\, due in part to the fact that many
relevant sources remain in\nmanuscript. This presentation will begin by ad
dressing the contours of\nthe manuscript archive and then turn to some of
the major themes that\nwe have found in our initial study of the sources t
herein.\n\nRegister in advance for this webinar here\n[https://theias.zoom
.us/webinar/register/WN_7He63454Tt69iR_9ZqGKSQ].\nAfter registering\, you
will receive a confirmation email containing\ninformation about joining th
e webinar.\n
DTSTART;TZID=America/New_York:20201021T120000
DTEND;TZID=America/New_York:20201021T120000
LAST-MODIFIED:20201013T142134Z
LOCATION:
SUMMARY:Near Eastern Studies Lecture
URL:https://www.ias.edu/events/near-eastern-studies-lecture
END:VEVENT
BEGIN:VEVENT
UID:0504b468-1380-42f4-b51f-271ebe0527c0
DTSTAMP:20201203T104601Z
CREATED:20201016T184612Z
DESCRIPTION:Topic: Multi-messenger cosmology: A new frontier\n\nSpeakers: S
uvodip Mukherjee\n\nAffiliation: University of Amsterdam\n\nThe discovery
of astrophysical gravitational waves has opened a new\navenue to explore t
he cosmos using transients. I will discuss a few\nnew frontiers in the fie
ld of physical cosmology and fundamental\nphysics that can be explored usi
ng gravitational waves from the\nongoing gravitational wave detectors and
in the future from\ngravitational wave detectors such as LISA\, Einstein T
elescope\, and\nCosmic Explorer. I will elucidate the existence of synergi
es between\nthe electromagnetic signals and gravitational wave signals and
its\nimportance in understanding the standard model of cosmology and\nunv
eiling new physics.\n
DTSTART;TZID=America/New_York:20201021T140000
DTEND;TZID=America/New_York:20201021T153000
LAST-MODIFIED:20201016T184612Z
LOCATION:Virtual Event
SUMMARY:University of Pennsylvania Astronomy Seminar
URL:https://www.ias.edu/events/university-pennsylvania-astronomy-seminar-15
END:VEVENT
BEGIN:VEVENT
UID:6032e4ae-c932-4242-83c4-e98aa35a45aa
DTSTAMP:20201203T104601Z
CREATED:20201008T194208Z
DESCRIPTION:Topic: (Equivariant) Cohomology of the affine Grassmannian and
Ginzburg’s picture\n\nSpeakers: Linyuan Liu\n\nAffiliation: University of
Sydney\; Member\, School of Mathematics\n\nThis is the second talk in a se
ries of three talks on the derived\nSatake. I will give an overview of an
article by Ginzburg which laid\nthe foundational ideas for this equivalenc
e.\n
DTSTART;TZID=America/New_York:20201021T150000
DTEND;TZID=America/New_York:20201021T170000
LAST-MODIFIED:20201030T014919Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory-5
END:VEVENT
BEGIN:VEVENT
UID:7f1547dd-1f24-45ba-8d48-d446e26a968e
DTSTAMP:20201203T104601Z
CREATED:20201005T142816Z
DESCRIPTION:Topic: Probing the Dark Universe with Light\n\nSpeakers: Priyam
vada Natarajan\n\nAffiliation: Yale University\n\nThe key elusive cosmic c
onstituents - dark matter\, dark energy and\nblack holes - play a fundamen
tal role in shaping the visible universe.\nIn this talk\, I will discuss t
he current status of our understanding\nof dark matter and the key open qu
estions. Gravitational lensing by\nclusters of galaxies offers a powerful
way to map dark matter and the\nhigh quality of current data permits detai
led comparison with\nsimulations of structure formation. Current deep Hubb
le Space\nTelescope data in combination with ground-based follow-up spectr
oscopy\npermit the construction of high-resolution lensing derived maps of
\ndark matter. I will present results from recent work that reveal\ntensio
ns between the predictions of the standard cold dark matter\ntheory and ob
servations of cluster lenses.\n\n \n\n_PROFESSOR PRIYAMVADA NATARAJAN SUGG
ESTED READING_\nMeneghetti\, M. et al. (2020)\, An excess of small-scale g
ravitational\nlenses observed in galaxy clusters\, Science\, Vol. 369\, Is
sue 6509\,\n1347-1353 (https://arxiv.org/pdf/2009.04471.pdf(link is extern
al)\n[https://www.google.com/url?q=https://arxiv.org/pdf/2009.04471.pdf&sa
=D&source=calendar&ust=1601731754692000&usg=AOvVaw2BdSMTRO5qBHM1UB-V1en1])
\n\nNatarajan\, P. et al. (2017)\, Mapping substructure in the HST Frontie
r\nFields cluster lenses and in cosmological simulations\, MNRAS\, 468\,\n
Issue 2\, 1962-1980 (https://arxiv.org/pdf/1702.04348.pdf(link is\nexterna
l\n[https://www.google.com/url?q=https://arxiv.org/pdf/1702.04348.pdf&sa=D
&source=calendar&ust=1601731754692000&usg=AOvVaw1_CKvvB5TVFiLCGzNzwNnW])\n
\n \n\n_NOTE: Most colloquiums are recorded (if the speaker consents). The
\nvideo is typically available within one week of the presentation date\na
nd will be posted to the Colloquium Archive\n[https://pppl-intranet.prince
ton.edu/colloquium-archive] page. If the\nspeaker consents\, we will also
post a PDF copy of their presentation\nto the archives page._\n
DTSTART;TZID=America/New_York:20201021T160000
DTEND;TZID=America/New_York:20201021T160000
LAST-MODIFIED:20201029T141242Z
LOCATION:Virtual Event via Zoom
SUMMARY:Princeton Plasma Physics Laboratory (PPPL) Colloquium
URL:https://www.ias.edu/events/princeton-plasma-physics-laboratory-pppl-col
loquium-39
END:VEVENT
BEGIN:VEVENT
UID:941e2345-c972-4e8c-83b5-8cd33a8657fd
DTSTAMP:20201203T104601Z
CREATED:20200806T225427Z
DESCRIPTION:Topic: The Mumford-Shah conjecture\n\nSpeakers: Silvia Ghinassi
\n\nAffiliation: University of Washington\; Visitor\, School of Mathematic
s\n\nThe Mumford-Shah functional has been introduced by Mumford and Shah i
n\n1989 as a variational model for image reconstruction. Since then\, it\n
has been widely studied both from a theoretical and an applied point\nof v
iew. In this talk we will focus on regularity of minimizers\,\nespecially
the famous Mumford-Shah conjecture. I will try to present\nthe existence a
nd regularity results up to today\, and if time allows\ndiscuss some recen
t progress (joint work with Camillo De Lellis and\nMatteo Focardi).\n
DTSTART;TZID=America/New_York:20201021T173000
DTEND;TZID=America/New_York:20201021T190000
LAST-MODIFIED:20201021T144120Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/events/mathematical-conversations-196
END:VEVENT
BEGIN:VEVENT
UID:d81c88bc-6b13-4035-98d1-90d820c776b2
DTSTAMP:20201203T104601Z
CREATED:20201009T161503Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201022T100000
DTEND;TZID=America/New_York:20201022T120000
LAST-MODIFIED:20201021T202326Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/events/moonshine-seminar-2
END:VEVENT
BEGIN:VEVENT
UID:cd977cdc-72bc-4630-ba2d-ce04861f0b0b
DTSTAMP:20201203T104601Z
CREATED:20200708T174933Z
DESCRIPTION:Topic: Cosmology with the Dark Energy Survey\, and beyond\n\nSp
eakers: Elisabeth Krause\n\nAffiliation: University of Arizona\n\nOver the
next decade\, large galaxy surveys will map billions of\ngalaxies and pro
be cosmic structure formation with high statistical\nprecision. This talk
will focus on the opportunities and challenges of\ncosmological analyses i
n the presence of complex systematic effects\nusing recent results from th
e Dark Energy Survey as pathfinder\nexamples. In particular\, I will descr
ibe different cosmological probes\nmeasured from DES data and summarize th
e recent papers on combining\ngalaxy clustering\, weak lensing\, cluster c
lustering and cluster\nabundances\, as well as constraints on baryons and
galaxy biasing from\nsmall scales.\n
DTSTART;TZID=America/New_York:20201022T110000
DTEND;TZID=America/New_York:20201022T120000
LAST-MODIFIED:20201201T200407Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/events/institute-advanced-study-astrophysics-semina
r-278
END:VEVENT
BEGIN:VEVENT
UID:20c0900d-6076-45d7-91d0-5e05358dce42
DTSTAMP:20201203T104601Z
CREATED:20200923T172348Z
DESCRIPTION:Topic: On the locally analytic vectors of the completed cohomol
ogy of modular curves\n\nSpeakers: Lue Pan\n\nAffiliation: University of C
hicago\n\nA classical result identifies holomorphic modular forms with hig
hest\nweight vectors of certain representations of $SL_2(\mathbb{R})$. We
\nstudy locally analytic vectors of the (p-adically) completed\ncohomology
of modular curves and prove a p-adic analogue of this\nresult. As applica
tions\, we are able to prove a classicality result\nfor overconvergent eig
enforms and give a new proof of Fontaine-Mazur\nconjecture in the irregula
r case under some mild hypothesis. One\ntechnical tool is relative Sen the
ory which allows us to relate\ninfinitesimal group action with Hodge(-Tate
) structure.
DTSTART;TZID=America/New_York:20201022T163000
DTEND;TZID=America/New_York:20201022T173000
LAST-MODIFIED:20201019T144139Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-236
END:VEVENT
BEGIN:VEVENT
UID:267fd4c9-eac5-4774-88af-5e459d4ea985
DTSTAMP:20201203T104601Z
CREATED:20200901T215541Z
DESCRIPTION:Topic: Examples related to Viterbo's conjectures\n\nSpeakers: M
ichael Hutchings\n\nAffiliation: University of California\, Berkeley\n\nVi
terbo conjectured that a normalized symplectic capacity\, on convex\ndomai
ns of a given volume\, is maximized for the ball. A stronger\nversion of t
his conjecture asserts that all normalized symplectic\ncapacities agree on
convex domains. Since convexity is not\nsymplectomorphism invariant\, one
can also ask to what extent these\nstatements still hold for nonconvex do
mains. We survey some special\ncases and examples around these questions\,
including recent joint\nworks with Julian Chaidez and Jean Gutt + Viniciu
s Ramos.\n
DTSTART;TZID=America/New_York:20201023T091500
DTEND;TZID=America/New_York:20201023T104500
LAST-MODIFIED:20201023T182450Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-16
END:VEVENT
BEGIN:VEVENT
UID:8a525da3-93c7-4eeb-a537-cbaa94a867c7
DTSTAMP:20201203T104601Z
CREATED:20201016T191653Z
DESCRIPTION:Topic: Atacama Cosmology Telescope (ACT)\n\nWe will reconvene t
his FRIDAY\, 10/23\, AT 12PM EDT for the fourth\ntalk in our 'group introd
uctions' series.\n\nThis week\, ADRI DUIVENVOORDEN\, ZACK LI\, BRANDON HEN
SLEY\, JO DUNKLEY\,\nAND LYMAN PAGE will update us on the status of the At
acama Cosmology\nTelescope (ACT). \n
DTSTART;TZID=America/New_York:20201023T120000
DTEND;TZID=America/New_York:20201023T130000
LAST-MODIFIED:20201021T181213Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Lunch Seminar
URL:https://www.ias.edu/events/princeton-university-gravity-group-lunch-sem
inar-42
END:VEVENT
BEGIN:VEVENT
UID:fbc4ca71-81ad-440a-af2b-d77599844b12
DTSTAMP:20201203T104601Z
CREATED:20201009T191520Z
DESCRIPTION:Topic: Turbulence\, Dynamo\, and Dissipation in Magnetized\, We
akly Collisional Astrophysical Plasmas\n\nSpeakers: Matthew Kunz\n\nAffili
ation: Princeton University\n\nThe transport of energy and momentum\, the
amplification and sustenance\nof magnetic fields\, and the heating of plas
ma particles by waves and\nturbulence are key ingredients in many problems
at the frontiers of\nheliospheric and astrophysics research. This include
s the heating and\nacceleration of the solar wind\; the observational appe
arance of\nblack-hole accretion flows on event-horizon scales\; and the pr
operties\nof the hot\, dilute plasma that fills dark-matter halos. All of
these\nplasmas are magnetized and weakly collisional\, with plasma beta\np
arameters of order unity or even much larger (“high-beta”). In\nthis regim
e\, deviations from local thermodynamic equilibrium\n('pressure anisotropi
es') and the kinetic instabilities they excite\ncan dramatically change th
e material properties of such plasmas and\nthereby influence the macroscop
ic evolution of their host systems. I\nwill highlight selected results fro
m an ongoing program of\ncalculations aimed at elucidating from first prin
ciples the physics of\nwaves\, turbulence\, heating\, and transport under
these conditions.\nThree key results will be featured. (1) Turbulent ampli
fication of\nmagnetic fields is possible\, efficient\, and likely self-acc
elerating\nin weakly collisional plasmas such as the intracluster medium (
ICM).\n(2) Pressure anisotropies generated either by fluctuations (as in t
he\nICM) or by global expansion (as in the solar wind) qualitatively\nchan
ge the properties of magnetized turbulence by triggering kinetic\ninstabil
ities\, reducing the plasma viscosity\, and altering the\nso-called “criti
cal balance”. (3) Thermal disequilibration of ions\nand electrons is a gen
eric outcome of magnetized\, collisionless\nturbulence\, with ions receivi
ng a majority of the cascaded energy for\nbeta >~ 1. In the waning minutes
of the talk\, I will advertise\n(briefly!) our group's ongoing efforts to
understand the role of\nmagnetic reconnection in the turbulent dynamo\, t
he nature of\ncollisionless heat conduction and convection\, and the forma
tion and\nevolution of protostellar accretion disks.
DTSTART;TZID=America/New_York:20201023T123000
DTEND;TZID=America/New_York:20201023T133000
LAST-MODIFIED:20201019T134159Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/events/princeton-university-astroplasmas-seminar-97
END:VEVENT
BEGIN:VEVENT
UID:ffe7ef52-3215-4569-8981-57405c3c0b35
DTSTAMP:20201203T104601Z
CREATED:20200820T172552Z
DESCRIPTION:Topic: How to describe\, analyze and interrogate dynamics of ge
ne regulatory networks\n\nSpeakers: Tomas Gedeon\n\nAffiliation: Montana S
tate University\n\nWe first describe mathematical foundation of DSGRN (Dyn
amic Signatures\nGenerated by Regulatory Networks)\, an approach that prov
ides a\nqueryable description of global dynamics of a network over its ent
ire\nparam- eter space. We describe a connection to Boolean network models
\nthat allows us to view DSGRN as a platform for bifurcation theory of\nBo
olean maps.\n\nWe describe several applications. We show how to use DSGRN
to (1)\ndesign a network that performs a biological function\; (2) diagnos
e why\na synthetic network failed\, and (3) delineate dynamics of network
that\ngoverns epithelial-mesenchynal transition\, which allows cells to\ne
scape confinement of a tissue and migrate.\n
DTSTART;TZID=America/New_York:20201023T140000
DTEND;TZID=America/New_York:20201023T153000
LAST-MODIFIED:20201013T144201Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Workshop on Topology: Identifying Order in Complex Systems
URL:https://www.ias.edu/events/workshop-topology-identifying-order-complex-
systems-127
END:VEVENT
BEGIN:VEVENT
UID:b82bd24e-8311-473e-b288-fb1a9a25e0e7
DTSTAMP:20201203T104601Z
CREATED:20200909T161423Z
DESCRIPTION:Topic: Dynamical Equilibrium in the Molecular ISM in 28 Nearby
Star-forming Galaxies\n\nSpeakers: Discussion Leader: Jiayi Sun\n\nAffilia
tion: Ohio State University\n\nEach week\, we hold a relatively informal s
eminar/discussion series\nwith an emphasis on extra-galactic and large-sca
le structure\nastrophysics.\n\nDuring Galread a leader/visitor presents a
recent paper to the\ndiscussion group. The PDF of the paper is projected o
nto 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\npowerp
oint-style slides. Galread discussions are very friendly and\ninteractive.
\n
DTSTART;TZID=America/New_York:20201026T110000
DTEND;TZID=America/New_York:20201026T120000
LAST-MODIFIED:20201009T172040Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-35
END:VEVENT
BEGIN:VEVENT
UID:d38fb9e1-2938-4254-9eaf-76c501aba4c5
DTSTAMP:20201203T104601Z
CREATED:20200827T124824Z
DESCRIPTION:Topic: Fractionally Log-Concave and Sector-Stable Polynomials:
Counting Planar Matchings and More\n\nSpeakers: Nima Anari\n\nAffiliation:
Stanford University\n\nWe introduce two new notions for polynomials assoc
iated with discrete\nset-valued probability distributions. These notions g
eneralize\nwell-studied properties like real-stability and log-concavity\,
but\nunlike them robustly degrade under a number of useful transformation
s\napplied to the polynomial/distribution. We show that these notions\nimp
ly polynomial time approximate sampling and counting algorithms\nthrough r
apid mixing of multi-site Glauber dynamics. We establish the\nnew notions
for polynomials/distributions related to matchings\,\nPfaffian point proce
sses\, and partition-constrained strongly Rayleigh\nmeasures with O(1) par
titions. As the main application we show how to\napproximately count match
ings of a desired size k\, or sample from the\nmonomer-dimer distribution\
, in arbitrary planar graphs (not\nnecessarily bipartite) in polynomial ti
me\; this answers a question\nraised by Jerrum in 1987 who proved intracta
bility of exact counting\nin the planar case. Joint work with Yeganeh Alim
ohammadi\, Kirankumar\nShiragur\, and Thuy-Duong Vuong.\n
DTSTART;TZID=America/New_York:20201026T111500
DTEND;TZID=America/New_York:20201026T121500
LAST-MODIFIED:20201103T235753Z
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-464
END:VEVENT
BEGIN:VEVENT
UID:47a763cd-5119-4211-81ea-b93e69a0ac1f
DTSTAMP:20201203T104601Z
CREATED:20201022T190356Z
DESCRIPTION:Topic: Chaotic Dynamical Tides and Efficient Hot Jupiter Format
ion\n\nSpeakers: Michelle Vick\n\nAffiliation: Northwestern University\n\n
High-eccentricity (high-e) migration may be an important channel for\nthe
formation of hot Jupiters (HJs). In this scenario\, a giant planet\nis exc
ited onto a very eccentric orbit that decays and circularizes on\nGyr time
scales due to tidal effects in the planet. Previous studies of\nhigh-e mig
ration have use parameterized treatments of weak tidal\nfriction and overl
ooked critical contributions from dynamical tides. I\ndemonstrate that the
inclusion of chaotic dynamical tides can endow\nhigh-e migration with sev
eral favorable features to explain\nobservations of HJs.\n
DTSTART;TZID=America/New_York:20201026T121500
DTEND;TZID=America/New_York:20201026T131500
LAST-MODIFIED:20201023T121814Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/events/princeton-university-exoplanet-discussion-gr
oup-53
END:VEVENT
BEGIN:VEVENT
UID:4c62592b-d271-4a14-8ba3-bf4fbe7ec889
DTSTAMP:20201203T104601Z
CREATED:20200921T150308Z
DESCRIPTION:Topic: Lyman-alpha forest perturbative modeling and improved CM
B constraining power\n\nSpeakers: Jahmour Givans\n\nAffiliation: Ohio Stat
e University\n\nThe Lyman-alpha forest is the primary cosmological tracer
in the\npost-reionization Universe at 2 must\nbe anti-concentrated: it takes on any fixed value with prob
ability at\nmost O(1/sqrt(n)). In fact\, the following stronger claim hold
s: for\nany integer k\, |Pr[=k] - Pr[ = k+4]| is at most O(1/n
).\nRemarkably\, this last claim is false if 4 is replaced with an integer
\nthat is not divisible by 4. I will explain why this happens in my\ntalk.
\n\nThis is joint work with Amir Yehudayoff.\n
DTSTART;TZID=America/New_York:20201102T111500
DTEND;TZID=America/New_York:20201102T121500
LAST-MODIFIED:20201103T235842Z
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-465
END:VEVENT
BEGIN:VEVENT
UID:aa095409-d665-4d16-9b31-86ef5d5bc2dd
DTSTAMP:20201203T104601Z
CREATED:20201029T180001Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART;TZID=America/New_York:20201102T121500
DTEND;TZID=America/New_York:20201102T131500
LAST-MODIFIED:20201029T180134Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-exoplanet-discussio
n-group
END:VEVENT
BEGIN:VEVENT
UID:2670a4f5-d719-4bbc-9f5e-d1aee4688502
DTSTAMP:20201203T104601Z
CREATED:20200921T150511Z
DESCRIPTION:Topic: Robust Measurements of the Large-Scale Clustering of Gal
axies and Quasars\n\nSpeakers: Mehdi Rezaie\n\nAffiliation: Ohio Universit
y\n\nObservational systematics pose a big challenge for wide-area galaxy\n
surveys. Standard systematics treatment methods are limited by their\nassu
mptions of linearity and improving them is a crucial step for the\nrobust
exploitation of galaxy clustering in the DESI and LSST era. In\nthis talk\
, I will present a novel non-linear mitigation approach\,\nbased on artifi
cial neural networks\, for galaxy clustering\nmeasurements. I will give a
brief summary of our paper 'Improving\ngalaxy clustering measurements with
deep learning: analysis of the\nDECaLS DR7 data' MNRAS (2020)\, where the
method has been developed\,\nvalidated\, and applied to the imaging data
from the DESI Legacy\nImaging Surveys DR7 and simulations. Then\, I will e
laborate on how we\nhave enhanced the method to unlock a robust measuremen
t of primordial\nnon-Gaussianity with the final sample of spectroscopic qu
asars from\nSDSS-IV eBOSS.\n\nSecond Speaker / Discussion Leader: ChangHoo
n Hahn\, Princeton\nUniversity\n
DTSTART;TZID=America/New_York:20201102T123000
DTEND;TZID=America/New_York:20201102T140000
LAST-MODIFIED:20201103T163527Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-22
END:VEVENT
BEGIN:VEVENT
UID:851c36bf-68c8-47af-b278-a034734e9116
DTSTAMP:20201203T104601Z
CREATED:20200924T161534Z
DESCRIPTION:Topic: Metric embeddings\, uniform rectifiability\, and the Spa
rsest Cut problem\n\nSpeakers: Robert Young\n\nAffiliation: New York Unive
rsity\; von Neumann Fellow\, School of Mathematics\n\n(joint work with Ass
af Naor) A key problem in metric geometry asks:\ngiven metric spaces $X$ a
nd $Y$\, how well does $X$ embed in $Y$? In\nthis talk\, we will consider
this problem for the case of the\nHeisenberg group and explain its connect
ions to geometric measure\ntheory and computer science. The Heisenberg gro
up $H$ is a metric\nspace that is hard to embed in $\mathbb{R}^n$. Cheeger
and Kleiner\nused a metric derivative based on surfaces in $H$ to show th
at it also\nfails to embed into $L_1$. We will use uniform rectifiability
to\nanalyze surfaces in $\mathbb{H}$\, provide sharp bounds on the\ndistor
tion of embeddings of $H$ and estimate the accuracy of an\napproximate alg
orithm for the Sparsest Cut Problem.\n
DTSTART;TZID=America/New_York:20201102T140000
DTEND;TZID=America/New_York:20201102T150000
LAST-MODIFIED:20201103T045716Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-341
END:VEVENT
BEGIN:VEVENT
UID:b371a421-bfca-42c0-babc-1a586713ff75
DTSTAMP:20201203T104601Z
CREATED:20200925T221708Z
DESCRIPTION:Topic: Falconer distance set problem using Fourier analysis\n\n
Speakers: Hong Wang\n\nAffiliation: Member\, School of Mathematics\n\nGive
n a set $E$ of Hausdorff dimension $s > d/2$ in $\mathbb{R}^d$ \,\nFalcone
r conjectured that its distance set $\Delta(E)=\{ |x-y|: x\, y\n\in E\}$ s
hould have positive Lebesgue measure. When $d$ is even\, we\nshow that $\d
im_H E>d/2+1/4$ implies $|\Delta(E)| > 0$. This improves\nupon the work of
Wolff\, Erdogan\, Du-Zhang\, etc. Our tools include\nOrponen's radial pro
jection theorem and refined decoupling estimates.\n\nThis is joint work wi
th Guth\, Iosevich\, and Ou and with Du\, Iosevich\,\nOu\, and Zhang.\n
DTSTART;TZID=America/New_York:20201102T163000
DTEND;TZID=America/New_York:20201102T173000
LAST-MODIFIED:20201103T045739Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-124
END:VEVENT
BEGIN:VEVENT
UID:df7bbc3f-6391-44e9-9948-6b9e2aef52e2
DTSTAMP:20201203T104601Z
CREATED:20200827T131741Z
DESCRIPTION:Topic: No seminar - Election Day\n\n
DTSTART;TZID=America/New_York:20201103T103000
DTEND;TZID=America/New_York:20201103T123000
LAST-MODIFIED:20201103T235905Z
LOCATION:
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-460
END:VEVENT
BEGIN:VEVENT
UID:11f63fd3-20f0-44d1-b735-f87ee4cadafe
DTSTAMP:20201203T104601Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201103T123000
DTEND;TZID=America/New_York:20201103T133000
LAST-MODIFIED:20201103T163823Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-138
END:VEVENT
BEGIN:VEVENT
UID:65069468-ad98-43a7-a372-80715b45b52d
DTSTAMP:20201203T104601Z
CREATED:20201002T172432Z
DESCRIPTION:Topic: No seminar: Election Day\n\n
DTSTART;TZID=America/New_York:20201103T133000
DTEND;TZID=America/New_York:20201103T153000
LAST-MODIFIED:20201026T172416Z
LOCATION:
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/events/working-group-stratified-homotopy-theory-3
END:VEVENT
BEGIN:VEVENT
UID:c6e3d241-0ef2-466c-94e5-67047c9c20b8
DTSTAMP:20201203T104601Z
CREATED:20201030T132047Z
DESCRIPTION:Topic: Decomposition numbers in defining characteristic\n\nSpea
kers: Andrea Dotto\n\nAffiliation: Member\, School of Mathematics\n\nThe d
ecomposition of the reduction of a Deligne--Lusztig character as\na sum of
Weyl modules is given by Jantzen's formula. In the case of\n$SL_2(F_q)$ t
he formula can be proved by a direct computation\, and as\na result we wil
l see that the entries in the decomposition matrix are\nall 0 or 1. This m
ultiplicity-one property (or rather\, its analogue\nfor $GL_2(F_q))$ has a
pplications in number theory through the\nformulation of Breuil's lattice
conjecture\, which gives a connection\nwith Emerton's talk in this study g
roup.\n
DTSTART;TZID=America/New_York:20201103T160000
DTEND;TZID=America/New_York:20201103T180000
LAST-MODIFIED:20201030T132749Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-1
END:VEVENT
BEGIN:VEVENT
UID:0ba02cab-8da1-4435-a5ab-fe1f05d0ba7e
DTSTAMP:20201203T104601Z
CREATED:20200901T214448Z
DESCRIPTION:Topic: Stability and sofic approximations for product groups an
d property (tau)\n\nSpeakers: Adrian Ioana\n\nAffiliation: University of C
alifornia\, San Diego\n\nA countable group $G$ is called sofic if it admit
s a sofic\napproximation: a sequence of asymptotically free almost actions
on\nfinite sets. Given a sofic group $G$\, it is a natural problem to try
\nto classify all its sofic approximations and\, more generally\, its\nasy
mptotic homomorphisms to finite symmetric groups. Ideally\, one\nwould aim
to show that any almost homomorphism from $G$ to a finite\nsymmetric grou
p is close to an actual homomorphism. If this is the\ncase\, then $G$ is c
alled stable in permutations\, or P-stable. In this\ntalk\, I will first p
resent a result providing a large class of product\ngroups are not P-stabl
e. In particular\, the direct products of the\nfree group on two generator
s with itself and with the group of\nintegers are not P-stable. This impli
es that P-stability is not closed\nunder the direct product construction\,
which answers a question of\nBecker\, Lubotzky and Thom. I will also pres
ent a more recent result\,\nwhich strengthens the above in the case when $
G$ is the direct product\nof the free group on two generators with itself.
This shows\, answering\na question of Bowen\, that $G$ admits a sofic app
roximation which is\nnot essentially a “branched cover” of a sofic approxi
mation by\nhomomorphisms.
DTSTART;TZID=America/New_York:20201104T110000
DTEND;TZID=America/New_York:20201104T121500
LAST-MODIFIED:20201014T165544Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Stability and Testability
URL:https://www.ias.edu/events/stability-and-testability-2
END:VEVENT
BEGIN:VEVENT
UID:3c30b13d-66fb-4b5d-a220-351399689a7f
DTSTAMP:20201203T104601Z
CREATED:20201008T194223Z
DESCRIPTION:Topic: The Derived Geometric Satake Equivalence of Bezrukavniko
v and Finkelberg\n\nSpeakers: Jize Yu\n\nAffiliation: Member\, School of M
athematics\n\nThis is the last talk towards understanding Bezrukavnikov-Fi
nkelberg's\nderived geometric Satake equivalence. With the preparations fr
om\nprevious talks\, we will introduce two filtrations: a topological\nfil
tration on the equivariant cohomology and an algebraic filtration\non the
Kostant functor. The comparison of these two functors will lead\nus to the
main statement of Bezrukavnikov-Finkelberg's derived\ngeometric Satake eq
uivalence.\n
DTSTART;TZID=America/New_York:20201104T150000
DTEND;TZID=America/New_York:20201104T170000
LAST-MODIFIED:20201030T211738Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory-7
END:VEVENT
BEGIN:VEVENT
UID:95e27854-ae2a-4d7d-9de4-cde0984df3eb
DTSTAMP:20201203T104601Z
CREATED:20200806T231920Z
DESCRIPTION:Topic: Three-term arithmetic progressions in sets of integers\n
\nSpeakers: Olof Sisask\n\nAffiliation: Stockholm University\n\nIt turns o
ut that certain additive patterns in the integers are very\nhard to get ri
d of. An instance of this is captured in a conjecture of\nErdős\, which st
ates that as long as a set of natural numbers is\n'somewhat dense' -- name
ly the sum of the reciprocals of its elements\ndiverges -- the set must co
ntain arbitrarily long arithmetic\nprogressions. In this talk\, I'll discu
ss recent work with Bloom where\nwe prove the simplest case of the conject
ure: finding arithmetic\nprogressions of length 3. This case has a rich hi
story\, and our work\nbuilds particularly upon that of Roth\, Bourgain and
Bateman--Katz.\nI'll aim to showcase some of this history\, and in partic
ular the\nproblem's lovely connections with harmonic analysis and convex\n
geometry.\n
DTSTART;TZID=America/New_York:20201104T173000
DTEND;TZID=America/New_York:20201104T190000
LAST-MODIFIED:20201030T143231Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/events/mathematical-conversations-198
END:VEVENT
BEGIN:VEVENT
UID:0a0ed63d-9c9b-4983-af53-d8d0e5453f61
DTSTAMP:20201203T104601Z
CREATED:20201009T161518Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201105T100000
DTEND;TZID=America/New_York:20201105T120000
LAST-MODIFIED:20201015T175725Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/events/moonshine-seminar-4
END:VEVENT
BEGIN:VEVENT
UID:1332bbcf-5f7d-465e-a05e-f3a96403b7d3
DTSTAMP:20201203T104601Z
CREATED:20201029T200818Z
DESCRIPTION:Topic: Wave Dark Matter\n\nSpeakers: Lam Hui\n\nAffiliation: Co
lumbia University\n\nA dark matter candidate lighter than about 30 eV\nexh
ibits wave behavior in a typical galactic environment. Examples\ninclude t
he QCD axion as well as other axion-like-particles. We review\nthe particl
e physics motivations\, and discuss experimental and\nobservational implic
ations of the wave dynamics\, including\ninterference substructures\, vort
ices\, soliton condensation and black\nhole hair.\n
DTSTART;TZID=America/New_York:20201105T110000
DTEND;TZID=America/New_York:20201105T120000
LAST-MODIFIED:20201201T200407Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar
END:VEVENT
BEGIN:VEVENT
UID:ae12324f-533b-4150-9c63-73f571726643
DTSTAMP:20201203T104601Z
CREATED:20201029T202909Z
DESCRIPTION:Topic: Astrophysical Implications of Non-Standard Dark Matter\n
\nSpeakers: Akaxia Cruz\n\nAffiliation: University of Washington\n\nThe ex
istence of dark matter (DM) has been made robust through\nmultiple orthogo
nal astrophysical probes\, yet the microscopic\nproperties of DM remain un
known. In particular\, it is unclear whether\nDM interacts with itself and
/or with the standard model (SM)\nnon-gravitationally. Cold DM\, a single\
, collision-less particle\nspecies with negligible primordial thermal disp
ersion is largely\nconsidered the “concordance” DM model in the astrophysi
cal\ncommunity. Yet observations on dwarf scales suggest that DM might be
\nself-interacting. In this seminar\, I will discuss two possible models\n
which give rise to DM self-interactions and a subset of their\nastrophysic
al implications: 1) the namesake model self-interacting DM\n(SIDM)\, in wh
ich DM interacts only with itself non-gravitationally\,\nand 2) milli-char
ged DM (mDM)\, in which DM can couple\nnon-gravitationally with itself and
with the SM. I will start by\ndiscussing hydrodynamic simulations demonst
rating SIDM induced delay\nof super-massive black hole growth in Milky-Way
mass galaxies. I will\nthen present semi-analytic calculations that show
streaming mDM can\ncause transverse EM Weibel plasma instabilities in gala
ctic systems\,\nsuch as DM falling onto Milky-Way like galaxies and in mer
ging\ngalaxies clusters.\n
DTSTART;TZID=America/New_York:20201105T133000
DTEND;TZID=America/New_York:20201105T143000
LAST-MODIFIED:20201029T203401Z
LOCATION:Virtual Event via Zoom
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar
END:VEVENT
BEGIN:VEVENT
UID:727c68e1-b230-4fd9-a8f8-69c437613b0a
DTSTAMP:20201203T104601Z
CREATED:20200923T172356Z
DESCRIPTION:Topic: Strong approximation for the Markoff equation via nonabe
lian level structures on elliptic curves\n\nSpeakers: William Chen\n\nAffi
liation: Columbia University\n\nFollowing Bourgain\, Gamburd\, and Sarnak\
, we say that the Markoff\nequation $x^2 + y^2 + z^2 - 3xyz = 0$ satisfies
strong approximation\nat a prime $p$ if its integral points surject onto
its $F_p$ points.\nIn 2016\, Bourgain\, Gamburd\, and Sarnak were able to
establish strong\napproximation at all but a sparse (but infinite) set of
primes\, and\nconjecture that it holds at all primes. Building on their re
sults\, in\nthis talk I will explain how to obtain strong approximation fo
r all\nbut a finite and effectively computable set of primes\, thus reduci
ng\nthe conjecture to a finite computation. The key result amounts to\nest
ablishing a congruence on the degree of a certain line bundle on\nthe modu
li stack of elliptic curves with $SL(2\,p)$-structures. To make\ncontact w
ith the Markoff equation\, we use the fact that the Markoff\nsurface is a
level set of the character variety for $SL(2)$\nrepresentations of the fun
damental group of a punctured torus\, and\nthat the strong approximation c
onjecture can be expressed in terms of\nthe mapping class group action on
the character variety\, which in turn\nalso determines the geometry of the
moduli stack of elliptic curves\nwith $SL(2\,p)$-structures. As time allo
ws we will also describe a\nnumber of applications.\n
DTSTART;TZID=America/New_York:20201105T163000
DTEND;TZID=America/New_York:20201105T173000
LAST-MODIFIED:20201030T144439Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-238
END:VEVENT
BEGIN:VEVENT
UID:8f14f6ff-a549-4eb9-b1b6-cfa1029b3951
DTSTAMP:20201203T104601Z
CREATED:20200901T215630Z
DESCRIPTION:Topic: Secondary coproducts in Morse and Floer homology\n\nSpea
kers: Kai Cieliebak\n\nAffiliation: University of Augsburg\n\nThis talk is
about joint work with Nancy Hingston and Alexandru\nOancea. We describe v
arious secondary coproducts on the Floer homology\nof a cotangent bundle a
nd show that\, under Viterbo's isomorphism\, they\nall correspond to the G
oresky-Hingston coproduct on loop space\nhomology. The proof uses compacti
fied moduli spaces of punctured\nholomorphic annuli.\n
DTSTART;TZID=America/New_York:20201106T091500
DTEND;TZID=America/New_York:20201106T104500
LAST-MODIFIED:20201026T171252Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-18
END:VEVENT
BEGIN:VEVENT
UID:934a0b73-173f-4120-bac8-38855506012a
DTSTAMP:20201203T104601Z
CREATED:20201030T141923Z
DESCRIPTION:Topic: No event this week.\n\n
DTSTART;TZID=America/New_York:20201106T123000
DTEND;TZID=America/New_York:20201106T133000
LAST-MODIFIED:20201105T203218Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r
END:VEVENT
BEGIN:VEVENT
UID:092f84f2-6827-4925-8d5b-e42c5be4d5ad
DTSTAMP:20201203T104601Z
CREATED:20200820T172716Z
DESCRIPTION:Topic: Algebraic and topological models for DNA recombination\n
\nSpeakers: Nataša Jonoska\n\nAffiliation: University of South Florida\n\n
DNA rearrangement is observed at developmental and evolutionary scale.\nTh
e recombination process can be directly modeled by 4-regular graphs\nand G
auss codes\, also called double occurrence words. We discuss\nproperties o
f these graphs\, their spatial embedding and max genera. We\nillustrate th
ese models through the recombination processes in a well\nstudied ciliate
species Oxytricha trifallax where DNA recombination is\nobserved on a mass
ive scale. We use word patterns within the double\noccurrence words to inv
estigate genome-wide scrambled gene\narchitectures that describe the precu
rsor-product relationships. The\ngenome wide rearrangement can be presente
d as directed graph and the\nfirst homology can be used to detect differen
t pathways of\nrecombination. Gene segments that recombine during these pr
ocesses may\nbe organized on the chromosome in a variety of ways. They can
overlap\,\ninterleave or one may be a subsegment of another. We use color
ed\ndirected graphs to represent contigs containing scrambled segment.\nUs
ing graph properties to each graph we associate a point in a higher\ndimen
sional Euclidean space such that cluster formations and analysis\ncan be p
erformed with methods from topological data analysis. The\nanalysis shows
some emerging graph structures indicating that segments\nof a single gene
can interleave in between\, or even contain\, all of\nthe segments from se
veral other genes.\n
DTSTART;TZID=America/New_York:20201106T140000
DTEND;TZID=America/New_York:20201106T153000
LAST-MODIFIED:20201030T143659Z
LOCATION:Remote Access Only
SUMMARY:Workshop on Topology: Identifying Order in Complex Systems
URL:https://www.ias.edu/events/workshop-topology-identifying-order-complex-
systems-128
END:VEVENT
BEGIN:VEVENT
UID:b82ddd2b-dfac-4290-8df9-c427731be51d
DTSTAMP:20201203T104601Z
CREATED:20200909T161644Z
DESCRIPTION:Topic: Half-mass radii of quiescent and star-forming galaxies e
volve slowly from 0.\n\nTopic 2: Modern cosmology has been remarkably successful in
describing\nthe Universe from a second after the Big Bang until today. Ho
wever\,\nits physics before that time is still much less certain. It profo
undly\ninvolves particle theory beyond the Standard Model to explain\nlong
-standing puzzles: the origin of the observed matter asymmetry\,\nnature o
f dark matter\, and cosmic inflation. In this talk\, I will\nexplain that
fractions of a second after the Big Bang\, relic feeble\naxion-SU(2) gauge
fields can possibly relate and explain these\nseemingly unrelated phenome
na in early and late cosmology. Moreover\,\nthese relics would provide a n
ew window into the early Universe in the\nform of primordial chiral gravit
ational waves. This mechanism can\npossibly lead to a new paradigm for par
ticle cosmology\, and its\nsmoking gun signature is testable by future CMB
missions.\n
DTSTART;TZID=America/New_York:20201116T123000
DTEND;TZID=America/New_York:20201116T140000
LAST-MODIFIED:20201111T162616Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-24
END:VEVENT
BEGIN:VEVENT
UID:8edbd0da-9de8-40b9-8ca4-49d842fb2f3c
DTSTAMP:20201203T104601Z
CREATED:20201027T161725Z
DESCRIPTION:Topic: Theta intertwining sheaves\n\nSpeakers: Zhiwei Yun\n\nAf
filiation: Massachusetts Institute of Technology\n\nThe theta corresponden
ce of Roger Howe gives a way to connect\nrepresentations of different clas
sical groups. We aim to geometrize\nthe theta correspondence for groups ov
er finite fields in the spirit\nof Lusztig's character sheaves. Given a re
ductive dual pair $(G_1\,\nG_2)$ acting on a symplectic space $V$\, we wil
l introduce a class of\nsimple perverse sheaves on $V$\, equivariant under
the action of $G_1\n\times G_2$\, that we call theta intertwining sheaves
. Roughly\, these\nsheaves geometrize projectors onto simple constituents
of the Weil\nrepresentation under $G_1 \times G_2$. Moreover\, they induce
a\ncorrespondence between character sheaves on $G_1$ and $G_2$. Based on
\njoint work in progress with S.Gurevich\n
DTSTART;TZID=America/New_York:20201116T133000
DTEND;TZID=America/New_York:20201116T143000
LAST-MODIFIED:20201110T174226Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory
END:VEVENT
BEGIN:VEVENT
UID:b85351d9-672d-4bf2-a36e-f27843193ca7
DTSTAMP:20201203T104601Z
CREATED:20200924T162032Z
DESCRIPTION:Topic: No seminar: workshop\n\n
DTSTART;TZID=America/New_York:20201116T140000
DTEND;TZID=America/New_York:20201116T150000
LAST-MODIFIED:20201106T172449Z
LOCATION:
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-343
END:VEVENT
BEGIN:VEVENT
UID:55d6e130-546e-4052-92b2-5c699a64d927
DTSTAMP:20201203T104601Z
CREATED:20201027T161746Z
DESCRIPTION:Topic: Modular Perverse Sheaves on the affine Flag Variety\n\nS
peakers: Laura Rider\n\nAffiliation: University of Georgia\n\nThere are tw
o categorical realizations of the affine Hecke algebra:\nconstructible she
aves on the affine flag variety and coherent sheaves\non the Langlands dua
l Steinberg variety. A fundamental problem in\ngeometric representation th
eory is to relate these two categories by a\ncategory equivalence. This wa
s achieved by Bezrukavnikov in\ncharacteristic 0 about a decade ago. In th
is talk\, I will discuss a\nfirst step toward solving this problem in the
modular case joint with\nR. Bezrukavnikov and S. Riche.\n
DTSTART;TZID=America/New_York:20201116T150000
DTEND;TZID=America/New_York:20201116T160000
LAST-MODIFIED:20201029T142828Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-0
END:VEVENT
BEGIN:VEVENT
UID:5f8baac4-61c3-441f-9bdd-6272ae31012d
DTSTAMP:20201203T104601Z
CREATED:20200925T221718Z
DESCRIPTION:Topic: On Hölder continuous globally dissipative Euler flows\n
\nSpeakers: Hyunju Kwon\n\nAffiliation: Member\, School of Mathematics\n\n
In the theory of turbulence\, a famous conjecture of Onsager asserts\nthat
the threshold Hölder regularity for the total kinetic energy\nconservatio
n of (spatially periodic) Euler flows is 1/3. In\nparticular\, there are H
ölder continuous Euler flows with Hölder\nexponent less than 1/3 exhibitin
g strict energy dissipation\, as proved\nrecently by Isett. In light of th
ese developments\, I'll discuss\nHölder continuous Euler flows which not o
nly have energy dissipation\nbut also satisfy a local energy inequality.\n
\nThis is joint work with Camillo De Lellis.\n
DTSTART;TZID=America/New_York:20201116T163000
DTEND;TZID=America/New_York:20201116T173000
LAST-MODIFIED:20201113T213431Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-126
END:VEVENT
BEGIN:VEVENT
UID:ef3ed160-46a9-4f9f-8b8d-ad289d8a6f1d
DTSTAMP:20201203T104601Z
CREATED:20201027T161811Z
DESCRIPTION:Topic: The integral coefficient geometric Satake equivalence in
mixed characteristic\n\nSpeakers: Jize Yu\n\nAffiliation: Member\, School
of Mathematics\n\nThe geometric Satake equivalence establishes a link bet
ween two\ncategories: the category of spherical perverse sheaves on the af
fine\nGrassmannian and the category of representations of the Langlands du
al\ngroup. It has found many important applications in the study of the\ng
eometric Langlands program and number theory. Lusztig\, Ginzburg\, and\nMi
rkovic-Vilonen pioneered the study of this equivalence in equal\ncharacter
istic. Later\, Zhu established the equivalence in the mixed\ncharacteristi
c setting for $\bar{\mathbb{Q}}_{\ell}$-coefficient\nperverse sheaves. Pet
er Scholze announced a result for the general\ncoefficient perverse sheave
s in mixed characteristic using the\nbeautiful theory of diamonds. In this
talk\, I will discuss the\nintegral coefficient geometric Satake equivale
nce in the mixed\ncharacteristic setting using a different approach.
DTSTART;TZID=America/New_York:20201116T163000
DTEND;TZID=America/New_York:20201116T173000
LAST-MODIFIED:20201029T142839Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-1
END:VEVENT
BEGIN:VEVENT
UID:c0c1ec3d-141f-4a1f-95f6-c855e7a0e6e7
DTSTAMP:20201203T104601Z
CREATED:20201027T161831Z
DESCRIPTION:Topic: Coherent categorification of quantum loop sl(2)\n\nSpeak
ers: Peng Shan\n\nAffiliation: Tsinghua University\; Member\, School of Ma
thematics\n\nWe explain an equivalence of categories between a module cate
gory of\nquiver Hecke algebras associated with the Kronecker quiver and a
\ncategory of equivariant perverse coherent sheaves on the nilpotent\ncone
of type A. This provides a link between two different monoidal\ncategorif
ications of the open quantum unipotent cell of affine type\n$A_1$\, one gi
ven by Kang-Kashiwara-Kim-Oh-Park in terms of quiver\nHecke algebras\, the
other given by Cautis-Williams in terms of\nequivariant perverse coherent
sheaves on affine Grassmannians. This is\na joint work with Michela Varag
nolo and Eric Vasserot.\n
DTSTART;TZID=America/New_York:20201117T080000
DTEND;TZID=America/New_York:20201117T090000
LAST-MODIFIED:20201029T142850Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-2
END:VEVENT
BEGIN:VEVENT
UID:0d863c8f-6d30-4370-a0ad-301a8ba82cdd
DTSTAMP:20201203T104601Z
CREATED:20201027T161852Z
DESCRIPTION:Topic: The Picard group of the stable module category of a fini
te group\n\nSpeakers: Jesper Grodal\n\nAffiliation: University of Copenhag
en\; Member\, School of Mathematics\n\nThe Picard group of the stable modu
le category of a finite group plays\na role in many parts of modular repre
sentation theory. It was\ncalculated when the group is an abelian $p$-grou
p\, by pioneering work\nof Dade in the 1970's\, and a classification for a
ll $p$-groups was\nobtained by Carlson-Thevenaz in the early 2000's in a s
eries of works.\nIn my talk I'll explain how to use methods from homotopy
theory and\nhigher algebra 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;TZID=America/New_York:20201117T093000
DTEND;TZID=America/New_York:20201117T103000
LAST-MODIFIED:20201029T142904Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-3
END:VEVENT
BEGIN:VEVENT
UID:991fa905-6255-4688-91fc-c1efc670f239
DTSTAMP:20201203T104601Z
CREATED:20200827T131829Z
DESCRIPTION:Topic: Factorization through L2\, Rounding and Duality\n\nSpeak
ers: Vijay Bhattiprolu\n\nAffiliation: Member\, School of Mathematics\n\nL
et X and Y be normed spaces. In functional analysis\, a ``theorem on\nfact
orization through L2'' refers to the following type of\nstatement: \n\nEve
ry bounded linear operator A mapping X to Y (i.e. sup_x\n||A(x)||_Y/||x||_
X < infinity)\, can be written as the composition\n(A=B.C) of bounded line
ar operators C mapping X to L2 and B mapping L2\nto Y. \n\nSuch factorizat
ion theorems and their variants (for various choices of\nnormed spaces X a
nd Y) are useful not only in functional analysis\n(where they were develop
ed to study norms on tensor product spaces X\n\otimes X)\, but in several
areas of computer science like discrepancy\ntheory\, communication complex
ity\, column subset selection and\noptimization. In this talk I will discu
ss a generic recipe (using\nrounding+duality) for proving factorization th
eorems. My goal is to\nprovide a streamlined exposition of a classical fac
torization theorem\nof Grothendieck and time permitting show a new factori
zation result\nwhich has applications to quadratic maximization over conve
x sets. \n\nBased on recent joint work with Euiwoong Lee and Assaf Naor.
\n
DTSTART;TZID=America/New_York:20201117T103000
DTEND;TZID=America/New_York:20201117T123000
LAST-MODIFIED:20201116T135632Z
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-462
END:VEVENT
BEGIN:VEVENT
UID:77570b31-09eb-482e-8cf9-4cfdc330230d
DTSTAMP:20201203T104601Z
CREATED:20201027T161910Z
DESCRIPTION:Topic: Path isomorphisms between quiver Hecke and diagrammatic
Bott-Samelson endomorphism algebras\n\nSpeakers: Amit Hazi\n\nAffiliation:
University of London\n\nWe construct an explicit isomorphism between cert
ain truncations of\nquiver Hecke algebras and Elias-Williamson's diagramma
tic endomorphism\nalgebras of Bott-Samelson bimodules. As a corollary\, we
deduce that\nthe decomposition numbers of these algebras (including as ex
amples the\nsymmetric groups and generalised blob algebras) are equal to t
he\nassociated $p$-Kazhdan-Lusztig polynomials\, provided that the\ncharac
teristic is greater than the Coxeter number. In the special case\nof the s
ymmetric group this gives an elementary and more explicit\nproof of the ti
lting character formula of Riche-Williamson's recent\nmonograph.\n
DTSTART;TZID=America/New_York:20201117T110000
DTEND;TZID=America/New_York:20201117T120000
LAST-MODIFIED:20201029T142917Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-4
END:VEVENT
BEGIN:VEVENT
UID:58e60aa7-d1e8-44bc-bcdb-b838da1f2c09
DTSTAMP:20201203T104601Z
CREATED:20201012T201859Z
DESCRIPTION:Topic: The Beta Israel and Ethiopian Christian Views of Jews an
d Judaism\n\nThis is the first event of a webinar series IAS Ethiopian Stu
dies\n\nCONVENORS: Suzanne Akbari (IAS)\, Aaron Butts (CUA / IAS)\, Samant
ha L.\nKelly (Rutgers U / IAS)\, Sabine Schmidtke (IAS)\n\nPANELISTS:\nSte
ven Kaplan (The Hebrew University of Jerusalem)\nSophia Dege-Müller (Ruhr-
Universität Bochum)\nMarcia Kupfer (Washington\, DC)\nAaron Butts (Catholi
c University of America / Institute for Advanced\nStudy)\n\nMODERATOR: \nS
amantha L. Kelly (Rutgers University / Institute for Advanced Study)\n\nRE
GISTRATION LINK:\nhttps://theias.zoom.us/webinar/register/WN_CifXZdD4Qpmuj
c3jwsX7lw\n\n
DTSTART;TZID=America/New_York:20201117T120000
DTEND;TZID=America/New_York:20201117T133000
LAST-MODIFIED:20201013T115701Z
LOCATION:Zoom Webinar
SUMMARY:IAS Ethiopian Studies Series
URL:https://www.ias.edu/events/ias-ethiopian-studies-series
END:VEVENT
BEGIN:VEVENT
UID:e01cc0c6-e2f6-4620-8263-f936ca00bc5b
DTSTAMP:20201203T104601Z
CREATED:20201027T161934Z
DESCRIPTION:Topic: The center of the small quantum group\n\nSpeakers: Pablo
Boixeda Alvarez\n\nAffiliation: Member\, School of Mathematics\n\n
DTSTART;TZID=America/New_York:20201117T123000
DTEND;TZID=America/New_York:20201117T133000
LAST-MODIFIED:20201029T150711Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-5
END:VEVENT
BEGIN:VEVENT
UID:3729c7f5-6541-428e-848f-66d8bafc9f84
DTSTAMP:20201203T104601Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201117T123000
DTEND;TZID=America/New_York:20201117T133000
LAST-MODIFIED:20201105T145209Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-140
END:VEVENT
BEGIN:VEVENT
UID:c5ac7071-7ba3-442b-a624-c926e169d1ab
DTSTAMP:20201203T104601Z
CREATED:20201002T172447Z
DESCRIPTION:Topic: The covariant model structure and straightening/unstraig
htening\n\nSpeakers: John Pardon\n\nAffiliation: Princeton University\n\n
DTSTART;TZID=America/New_York:20201117T133000
DTEND;TZID=America/New_York:20201117T153000
LAST-MODIFIED:20201104T170222Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/events/working-group-stratified-homotopy-theory-5
END:VEVENT
BEGIN:VEVENT
UID:b2ef9866-8705-403e-8be0-482aa710225b
DTSTAMP:20201203T104601Z
CREATED:20201109T192317Z
DESCRIPTION:Topic: No seminar: workshop\n\n
DTSTART;TZID=America/New_York:20201117T150000
DTEND;TZID=America/New_York:20201117T170000
LAST-MODIFIED:20201109T212130Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-3
END:VEVENT
BEGIN:VEVENT
UID:6ccabfd7-7524-4c97-830e-31fadb89653a
DTSTAMP:20201203T104601Z
CREATED:20200901T214545Z
DESCRIPTION:Topic: Surface groups are flexibly stable\n\nSpeakers: Nir Laza
rovich\n\nAffiliation: Technion\n\nIn this talk I will present a joint wor
k with Arie Levit and Yair\nMinsky on flexible stability of surface groups
. The proof will be\ngeometric in nature and will rely on an analysis of b
ranched covers of\nhyperbolic surfaces. Along the way we will see a quanti
tative variant\nof the LERF property for surface groups which may be of in
dependent\ninterest.\n
DTSTART;TZID=America/New_York:20201118T110000
DTEND;TZID=America/New_York:20201118T121500
LAST-MODIFIED:20201111T185243Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Stability and Testability
URL:https://www.ias.edu/events/stability-and-testability-4
END:VEVENT
BEGIN:VEVENT
UID:ec0e313f-3dff-4144-88f3-a7c7dcb7bd4e
DTSTAMP:20201203T104601Z
CREATED:20201027T161958Z
DESCRIPTION:Topic: 2-Verma modules\n\nSpeakers: Gregoire Naisse\, Pedro Vaz
\n\nAffiliation: University College London\; University College London\n\n
Categorification of integrable representations of quantum Kac--Moody\nalge
bras is a relatively well-developed subject nowadays\, which has\nfound se
veral applications\, in particular to low-dimensional topology.\nThe story
outside of the integrable world is far less well-known. In\nthe first par
t of this talk\, we'll explain the ideas behind\ncategorification of Verma
modules\, and how our construction is related\nto other known structures
in higher representation theory. In the\nsecond part\, we'll discuss how t
o extend the construction to tensor\nproducts involving Verma modules\, an
d some connections with\nlow-dimensional topology.\n
DTSTART;TZID=America/New_York:20201118T140000
DTEND;TZID=America/New_York:20201118T150000
LAST-MODIFIED:20201029T142928Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-6
END:VEVENT
BEGIN:VEVENT
UID:5b94371d-0400-4f74-b61d-5a12315df2d2
DTSTAMP:20201203T104601Z
CREATED:20201008T194239Z
DESCRIPTION:Topic: No seminar: workshop\n\n
DTSTART;TZID=America/New_York:20201118T150000
DTEND;TZID=America/New_York:20201118T170000
LAST-MODIFIED:20201106T172210Z
LOCATION:
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory-9
END:VEVENT
BEGIN:VEVENT
UID:58e8779b-fb97-4b1a-ab57-8d741405aeae
DTSTAMP:20201203T104601Z
CREATED:20201027T162026Z
DESCRIPTION:Topic: Representations on KU-modules\n\nSpeakers: David Treuman
n\n\nAffiliation: Boston College\n\nAlgebraic topologists talk about an el
evator from characteristic zero\nto characteristic p\, with infinitely man
y floors in between called\nchromatic levels. I think you could 'do repres
entation theory' at any\nof these levels. I once tried to explore the firs
t level: A\n'KU-module'\, or anyway a $p$-adically complete KU-module\, is
a level\none version of a complex vector space (at level zero) and of a\n
$Z_p$-module (at level infinity). KU is a name for topological\nK-theory\,
in the talk I'll discuss representations --- probably\,\nmostly\, of fini
te groups --- on $p$-complete KU-modules.\nRepresentations are harder to m
odel in this world but some\ncomputations are easier\, for about the same
reason that K-theory is\nsometimes easier to compute than cohomology.\n
DTSTART;TZID=America/New_York:20201118T153000
DTEND;TZID=America/New_York:20201118T163000
LAST-MODIFIED:20201029T142939Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-7
END:VEVENT
BEGIN:VEVENT
UID:5ecf7abe-7026-4041-a45e-2fa104148772
DTSTAMP:20201203T104601Z
CREATED:20201027T162047Z
DESCRIPTION:Topic: Stability and Periodicity in Modular Representation Theo
ry\n\nSpeakers: Nate Harman\n\nAffiliation: Member\, School of Mathematics
\n\nI will review certain stabilization phenomena in the characteristic\nz
ero representation theory of general linear and symmetric groups as\nthe r
ank tends to infinity. Then I will give a survey of some results\nand conj
ectures about analogs of these in the positive characteristic\nand quantum
settings\, exploring what happens as the rank tends to\ninfinity while th
e characteristic either remains fixed or grows at a\nrate comparable to th
e rank.\n
DTSTART;TZID=America/New_York:20201118T170000
DTEND;TZID=America/New_York:20201118T180000
LAST-MODIFIED:20201029T142950Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-8
END:VEVENT
BEGIN:VEVENT
UID:4dddc9f8-cd37-43ea-a197-bf6d251f1192
DTSTAMP:20201203T104601Z
CREATED:20200806T232132Z
DESCRIPTION:Topic: Higher order Fourier analysis and generalizations of Sze
merédi's theorem\n\nSpeakers: Sarah Peluse\n\nAffiliation: Institute for A
dvanced Study and Princeton University\; Veblen Research Instructor\, Scho
ol of Mathematics\n\nSeveral of the most important problems in combinatori
al number theory\nask for the size of the largest subset of some abelian g
roup or\ninterval of integers lacking points in a fixed arithmetic\nconfig
uration. One example of such a question is\, 'What is the largest\nsubset
of $\{1\,\ldots \,N\}$ with no nontrivial $k$-term arithmetic\nprogression
s $x\,x+y\,x+2y\,...\,x+(k-1)y$?'. Gowers initiated the study\nof higher o
rder Fourier analysis while seeking to answer this question\nand used it t
o give the first reasonable quantitative bounds in 1998\nfor $k=4$ and 200
1 for all $k$. Two other examples of such questions\nare\, 'What is the la
rgest subset of $\{1\,\ldots\,N\}$ with no shifted\ngeometric progressions
of the form $x\,x+y\,x+y^2\,...\,x+y^k$?' and 'What\nis the largest subse
t of $Z/NZ \times Z/NZ$ with no four vertices of\nan axis-aligned square $
(x\,y)\, (x+d\,y)\, (x\,y+d)\, (x+d\,y+d)$'? Recent\nwork now gives a reas
onable bound for this first question\, but none is\ncurrently known for th
e second. In this talk\, I'll explain what higher\norder Fourier analysis
is and its relevance to Szemerédi's theorem\nand generalizations\, and sta
te some open questions in the area.\n
DTSTART;TZID=America/New_York:20201118T173000
DTEND;TZID=America/New_York:20201118T190000
LAST-MODIFIED:20201116T142100Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/events/mathematical-conversations-202
END:VEVENT
BEGIN:VEVENT
UID:e7250f2f-6bc8-476a-a55b-71c4df046878
DTSTAMP:20201203T104601Z
CREATED:20201027T162107Z
DESCRIPTION:Topic: Cohomology of line bundles on flag varieties in positive
characteristic \n\nSpeakers: Linyuan Liu\n\nAffiliation: Sydney Mathemati
cal Research Institute\, The University of Sydney\; Member\, School of Mat
hematics\n\nLet $G$ be a semi-simple algebraic group over an algebraically
closed\nfield $k$ of positive characteristic and let $B$ be a Borel subgr
oup.\nThe cohomology of line bundles on the flag variety $G/B$ induced by
\ncharacters of $B$ are important objects in the representation theory\nof
$G$. In this talk\, I will start by briefly recalling the theory in\nzero
characteristic\, which has been well-understood for a long time\,\nand so
me important previous results in positive characteristics\, due\nto Kempf\
, Griffith\, Andersen\, Jantzen\, Kuhne-Hausmann\, Irving\, Doty\,\nSulliv
an\, Donkin\, etc. Then\, I will present the new results for $G =\nSL_3$ o
btained in my thesis. More precisely\, I have shown the\nexistence of two
filtrations of $H^i (G/B\, \mu)$. The first exists for\n$i = 1.2$ and $\mu
$ in the Griffith region. The second\, which\ngeneralizes the $p$-filtrati
on introduced by Jantzen\, exists for all\n$i$ and $\mu$.\n
DTSTART;TZID=America/New_York:20201118T183000
DTEND;TZID=America/New_York:20201118T193000
LAST-MODIFIED:20201029T143002Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-9
END:VEVENT
BEGIN:VEVENT
UID:2b70874e-8093-412d-8a41-de07e7fe0277
DTSTAMP:20201203T104601Z
CREATED:20201027T162128Z
DESCRIPTION:Topic: Induction of p-Cells and Localization\n\nSpeakers: Lars
Thorge Jensen\n\nAffiliation: Member\, School of Mathematics\n\nAbstract:
in joint work with Leonardo Patimo\, we investigate the\ncompatibility of
\np-cells with respect to standard parabolic subgroups. Given a p-cell\nin
\na standard parabolic subgroup of a crystallographic Coxeter system\,\non
e can induce the corresponding cell module and ask whether it\ndecomposes
into cell modules. Localization techniques allow us to\ngive an affirmativ
e answer to this question. Along the way\, we prove\nsome new positivity p
roperties of the p-canonical basis.\n\n \n
DTSTART;TZID=America/New_York:20201119T100000
DTEND;TZID=America/New_York:20201119T110000
LAST-MODIFIED:20201116T165330Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-10
END:VEVENT
BEGIN:VEVENT
UID:3d713c0b-7a81-4966-8988-3dc3b243b524
DTSTAMP:20201203T104601Z
CREATED:20200708T175130Z
DESCRIPTION:Topic: Venus: Moment of Inertia and Length of Day\n\nSpeakers:
Jean-Luc Margot\n\nAffiliation: University of California\, Los Angeles\n\n
Earth-based radar observations in 2006–2019 enable the first\nmeasurement
of the spin precession rate and moment of inertia of\nVenus. The observati
ons also show that the spin period of the solid\nplanet changes by tens of
minutes. The length-of-day variations are\ndue to variations in atmospher
ic angular momentum transferred to the\nsolid planet.\n
DTSTART;TZID=America/New_York:20201119T110000
DTEND;TZID=America/New_York:20201119T120000
LAST-MODIFIED:20201201T200407Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/events/institute-advanced-study-astrophysics-semina
r-282
END:VEVENT
BEGIN:VEVENT
UID:742bbff3-c88e-4456-bccb-33054fec75a1
DTSTAMP:20201203T104601Z
CREATED:20201027T162148Z
DESCRIPTION:Topic: Reverse Plane Partitions and Modules for the Preprojecti
ve Algebra\n\nSpeakers: Anne Dranowski\n\nAffiliation: Member\, School of
Mathematics\n\nReverse plane partitions - or RPPs for short - are order re
versing\nmaps of minuscule posets in types ADE. We report on joint work in
\nprogress with Elek\, Kamnitzer\, Libman\, and Morton-Ferguson in which w
e\ngive a type independent proof that RPPs form a crystal. Moreover\, we\n
describe how the crystal structure on RPPs can be realized\ngeometrically
on Lusztig’s nilpotent variety $L$ via a bijection\nbetween RPPs and 'gene
ric' modules for the preprojective algebra. Time\npermitting we explore th
e effects of toggling and RSK on irreducible\ncomponents of $L$.\n
DTSTART;TZID=America/New_York:20201119T113000
DTEND;TZID=America/New_York:20201119T123000
LAST-MODIFIED:20201029T143026Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-11
END:VEVENT
BEGIN:VEVENT
UID:61dd765e-e6e8-48cd-9ea7-67ff7499b780
DTSTAMP:20201203T104601Z
CREATED:20201027T162209Z
DESCRIPTION:Topic: Unitriangularity and Decomposition Matrices of Unipotent
Blocks\n\nSpeakers: Jay Taylor\n\nAffiliation: University of Southern Cal
ifornia\; Member\, School of Mathematics\n\nFor a finite group $G$ one has
a process of modular reduction which\ntakes a $KG$-module\, over a field
$K$ of characteristic zero\, and\nproduces a $kG$-module\, over a field $k
$ of positive characteristic.\nStarting with a simple $KG$-module its modu
lar reduction may fail to\nbe simple. The rows and columns of the decompos
ition matrix are\nlabelled by the simple $KG$-modules and simple $kG$-modu
les\nrespectively. The rows of the matrix encode the multiplicities of the
\nsimple $kG$-modules in a composition series of the corresponding\nreduce
d $KG$-module.\n\nThe decomposition matrix can be partitioned with respect
to the blocks\nof $kG$. When $G = G(\mathbb{F}_q)$ is a finite reductive
group\, such\nas the finite general linear group\, the unipotent blocks fo
rm a\nprototype for all blocks. In this talk we will present joint work wi
th\nO. Brunat and O. Dudas showing that for some ordering of the rows and
\ncolumns the decomposition matrix of the unipotent blocks has a lower\nun
itriangular shape (under some mild conditions on $q$ and the\ncharacterist
ic of $k$).\n
DTSTART;TZID=America/New_York:20201119T130000
DTEND;TZID=America/New_York:20201119T140000
LAST-MODIFIED:20201029T143037Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-12
END:VEVENT
BEGIN:VEVENT
UID:423e68f3-20ac-4e2d-966a-91787a1db5de
DTSTAMP:20201203T104601Z
CREATED:20201113T141640Z
DESCRIPTION:Topic: Star Clusters Simulated Across Cosmic Time: Insights fro
m E-MOSAICS\n\nSpeakers: Ben Keller\n\nAffiliation: Heidelberg University
\n\nThe formation and evolution of stellar clusters is intrinsically\nlink
ed to their environment. On the large-scale\, star clusters form in\ngalax
ies embedded within the cosmic web. On the smaller scales\, stars\nform in
hierarchical clusters inside fractal giant molecular clouds\n(GMCs). This
produces a broad diversity of stellar environments\, from\nthe old\, dens
e\, globular clusters (GCs) that we observe throughout\ngalaxy discs and h
alos\, to young massive clusters (YMCs) in the\ndensest star forming envir
onments of the present\, to the field stars\nwe see spread throughout the
galaxy disc. The different clustered\nenvironments that stars find themsel
ves in has typically been ignored\nin simulations of galaxy formation\, as
it occurs on length scales that\nare below the resolution limit of nearly
all simulations. For the\nfirst time\, we now can now couple galaxy forma
tion simulations to\nphysically-motivated models for star cluster formatio
n (the cluster\nmass function and cluster formation efficiency) and cluste
r evolution\n(stellar evolution\, dynamical friction\, evaporation\, and t
idal\nshocks). These tools allow us to study the impact that the full cosm
ic\nenvironment and history has on the formation of star clusters. With\nt
his\, we can predict the origin of the GC population in MW-like\ngalaxies\
, reconstruct the formation history of our own galaxy\, and\nbetter unders
tand the structures we see in the universe. In this talk\,\nI will explain
how we have simulated the co-evolution of galaxies and\nstar clusters in
the E-MOSAICS simulations\, the primary results (to\ndate) of this project
\, and the next steps we will be taking to push\nour understanding of star
and galaxy formation forward through\nsimulation.\n
DTSTART;TZID=America/New_York:20201119T133000
DTEND;TZID=America/New_York:20201119T143000
LAST-MODIFIED:20201113T141836Z
LOCATION:Virtual Event via Zoom
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
0
END:VEVENT
BEGIN:VEVENT
UID:3cc2294c-9f04-474d-b670-f50e106ba502
DTSTAMP:20201203T104601Z
CREATED:20201027T162230Z
DESCRIPTION:Topic: Generalized affine Grassmannian slices\, truncated shift
ed Yangians\, and Hamiltonian reduction\n\nSpeakers: Joel Kamnitzer\n\nAff
iliation: University of Toronto\n\nGiven a representation of a reductive g
roup\,\nBraverman-Finkelberg-Nakajima defined a Poisson variety called the
\nCoulomb branch\, using a convolution algebra construction. This variety
\ncomes with a natural deformation quantization\, called a Coulomb branch
\nalgebra. Important cases of these Coulomb branches are (generalized)\naf
fine Grassmannian slices\, and their quantizations are truncated\nshifted
Yangians. Motivated by the geometric Satake correspondence and\nthe theory
of symplectic duality/3d mirror symmetry\, we expect a\ncategorical g-act
ion on modules for these truncated shifted Yangians.\nI will explain three
results in this direction. First\, we have an\nindirect realization of th
is action\, using equivalences with\nKLRW-modules. Second\, we have a geom
etric relation between these\ngeneralized slices by Hamiltonian reduction.
Finally\, we have an\nalgebraic version of this Hamiltonian reduction whi
ch we are able to\nrelate to the first realization.\n
DTSTART;TZID=America/New_York:20201119T143000
DTEND;TZID=America/New_York:20201119T153000
LAST-MODIFIED:20201029T143048Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-13
END:VEVENT
BEGIN:VEVENT
UID:3d308dc2-16a0-4540-b5a0-c3bed6d43bfd
DTSTAMP:20201203T104601Z
CREATED:20200923T172404Z
DESCRIPTION:Topic: Ramanujan Conjecture and the Density Hypothesis\n\nSpeak
ers: Shai Evra\n\nAffiliation: Princeton University\n\nThe Generalized Ram
anujan Conjecture (GRC) for GL(n) is a central open\nproblem in modern num
ber theory. Its resolution is known to yield\nseveral important applicatio
ns. For instance\, the Ramanujan-Petersson\nconjecture for GL(2)\, proven
by Deligne\, was a key ingredient in the\nwork of Lubotzky-Phillips-Sarnak
on Ramanujan graphs. One can also\nstate analogues (Naive) Ramanujan Conj
ectures (NRC) for other\nreductive groups. However\, in the 70's Kurokawa
and\nHowe-Piatetski-Shapiro proved that the (NRC) fails even for\nquasi-sp
lit classical groups. In the 90's Sarnak-Xue put forth a\nDensity Hypothes
is version of the (NRC)\, which serves as a replacement\nof the (NRC) in a
pplications. In this talk I will describe a possible\napproach to proving
the Density Hypothesis for definite classical\ngroups\, by invoking deep a
nd recent results coming from the Langlands\nprogram: The endoscopic class
ification of automorphic representations\nof classical groups due to Arthu
r\, and the proof of the Generalized\nRamanujan-Petersson Conjecture.\n
DTSTART;TZID=America/New_York:20201119T163000
DTEND;TZID=America/New_York:20201119T173000
LAST-MODIFIED:20201113T224904Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-240
END:VEVENT
BEGIN:VEVENT
UID:a8bb1d5f-2871-4aa9-9737-79ae434a5df3
DTSTAMP:20201203T104601Z
CREATED:20200901T215726Z
DESCRIPTION:Topic: Persistence and Triangulation in Lagrangian Topology\n\n
Speakers: Paul Biran\n\nAffiliation: Eidgenössische Technische Hochschule
(ETH) Zürich\n\nTriangulated categories play an important role in symplect
ic topology.\nThe aim of this talk is to explain how to combine triangulat
ed\nstructures with persistence module theory in a geometrically\nmeaningf
ul way. The guiding principle comes from the theory of\nLagrangian cobordi
sm. The talk is based on ongoing joint work with\nOctav Cornea and Jun Zha
ng.\n
DTSTART;TZID=America/New_York:20201120T091500
DTEND;TZID=America/New_York:20201120T104500
LAST-MODIFIED:20201113T010648Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-20
END:VEVENT
BEGIN:VEVENT
UID:bb14b088-fb69-4df9-b600-d144660470bf
DTSTAMP:20201203T104601Z
CREATED:20201009T161533Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201120T100000
DTEND;TZID=America/New_York:20201120T120000
LAST-MODIFIED:20201118T142536Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/events/moonshine-seminar-6
END:VEVENT
BEGIN:VEVENT
UID:f297fbae-41d1-4b39-8d39-ba6087f12303
DTSTAMP:20201203T104601Z
CREATED:20201113T143228Z
DESCRIPTION:Topic: The XFaster Power Spectrum and Likelihood Estimator and
its Application to SPIDER\n\nSpeakers: Anne Gambrel\n\nAffiliation: Kavli
Institute for Cosmological Physics (University of Chicago)\n\nEvery analys
is of cosmic microwave background observations faces the\nchallenge of com
pressing large amounts of data into the comparatively\ntiny spaces of powe
r spectra and cosmological parameters. A variety of\npipelines have been u
sed to accomplish this task\, balancing the goals\nof optimally computing
these quantities and their errors while\nrequiring minimal computational c
ost. In this talk\, I will introduce\nthe XFaster pipeline\, which estimat
es maximum likelihood bandpowers\nand their covariances quickly and with a
relatively small ensemble of\nsignal and noise simulations. XFaster has b
een used by the BOOMERanG\nand Planck experiments\, and has been repackage
d and extended for\nSPIDER. I will discuss the algorithm and the code\, in
cluding new null\ntest and foreground fitting features implemented for SPI
DER. I will\nshow the results of the extensive pipeline testing we have pe
rformed\,\nand some results from its application to SPIDER data.\n
DTSTART;TZID=America/New_York:20201120T120000
DTEND;TZID=America/New_York:20201120T130000
LAST-MODIFIED:20201117T195823Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Group Lunch Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-group-lunch
-seminar-0
END:VEVENT
BEGIN:VEVENT
UID:0e6f511e-bd36-496f-b451-9fb012ff9d35
DTSTAMP:20201203T104601Z
CREATED:20201027T162255Z
DESCRIPTION:Topic: Macdonald polynomials and decomposition numbers for fini
te unitary groups\n\nSpeakers: Olivier Dudas\n\nAffiliation: Institut de m
athématiques de Jussieu–Paris Rive Gauche\n\n(work in progress with R. Rou
quier) I will present a computational\n(yet conjectural) method to determi
ne some decomposition matrices for\nfinite groups of Lie type. These matri
ces encode how ordinary\nrepresentations decompose when they are reduced t
o a field with\npositive characteristic $\ell$. There is an algorithm to c
ompute them\nfor $GL(n\,q)$ when $\ell$ is large enough\, but finding thes
e matrices\nfor other groups of Lie type is a very challenging problem.\n
\nIn this talk I will focus on the finite general unitary group\n$GU(n\,q)
$. I will first explain how one can produce a 'natural'\nself-equivalence
in the case of $GL(n\,q)$ coming from the topology of\nthe Hilbert scheme
of the complex plane. The combinatorial part of\nthis equivalence is relat
ed to Macdonald's theory of symmetric\nfunctions and gives $(q\,t)$-decomp
osition numbers. The evidence\nsuggests that the case of finite unitary gr
oups is obtained by taking\na suitable square root of that equivalence\, w
hich encodes the relation\nbetween $GU(n\,q)$ and $GL(n\,-q)$.\n
DTSTART;TZID=America/New_York:20201120T140000
DTEND;TZID=America/New_York:20201120T150000
LAST-MODIFIED:20201029T143101Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-14
END:VEVENT
BEGIN:VEVENT
UID:20224bde-c9cd-417f-9b8a-9cc8faa4de86
DTSTAMP:20201203T104601Z
CREATED:20200820T172918Z
DESCRIPTION:Topic: Topological methods for characterizing the relationship
between polymer entanglement and viscoelasticity\n\nSpeakers: Eleni Panagi
otou\n\nAffiliation: University of Tennessee\, Chattanooga\n\nPolymers are
macromolecules that cannot cross each other without\nbreaking their bonds
. This leads to polymer chain entanglement which\ndetermines bulk viscoela
stic responses of the material. Understanding\nthe relation between entang
lement and viscoelasticity requires a\nrigorous measure of entanglement. I
n this talk we will see how tools\nfrom topology can be used to rigorously
characterize the relationship\nbetween polymer chain entanglement and bul
k viscoelastic responses.\n
DTSTART;TZID=America/New_York:20201120T140000
DTEND;TZID=America/New_York:20201120T153000
LAST-MODIFIED:20201111T125914Z
LOCATION:Remote Access Only
SUMMARY:Workshop on Topology: Identifying Order in Complex Systems
URL:https://www.ias.edu/events/workshop-topology-identifying-order-complex-
systems-129
END:VEVENT
BEGIN:VEVENT
UID:a40431b5-0b8c-4367-b5da-ea45c7060f6e
DTSTAMP:20201203T104601Z
CREATED:20201027T162318Z
DESCRIPTION:Topic: Real and symmetric Springer theory\n\nSpeakers: David Na
dler\n\nAffiliation: University of California\, Berkeley\n\nI'll present j
oint work with Tsao-Hsien Chen on the geometry of real\nand symmetric matr
ices. For classical groups\, we use hyperkahler\ngeometry to lift the Kost
ant-Sekiguchi correspondence to an\nequivariant homeomorphism. As an appli
cation\, we show the\nhomeomorphism matches the real Springer resolution w
ith a nearby\nregular semisimple symmetric conjugacy class.\n
DTSTART;TZID=America/New_York:20201120T153000
DTEND;TZID=America/New_York:20201120T163000
LAST-MODIFIED:20201029T143112Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-15
END:VEVENT
BEGIN:VEVENT
UID:1fb27cd2-3cdb-4762-99cd-1af8b9136421
DTSTAMP:20201203T104601Z
CREATED:20201027T162338Z
DESCRIPTION:Topic: Curved Hecke categories\n\nSpeakers: Shotaro Makusumi\n
\nAffiliation: Columbia University\; Member\, School of Mathematics\n\nThe
Hecke algebra admits an involution which preserves the standard\nbasis an
d exchanges the canonical basis with its dual. This involution\nis categor
ified by 'monoidal Koszul duality' for Hecke categories\,\nstudied in posi
tive characteristic in my previous joint work with\nAchar\, Riche\, and Wi
lliamson. In this talk I will explain the\nfollowing rough statement: 'The
Koszul dual of the Hecke category is\nequivalent to the derived category
of bimodules for a particular\nKoszul complex in the Hecke category of the
Langlands dual.' This is\nmotivated by the curved Koszul duality of Posit
selski and Burke. If\ntime permits\, I will also discuss the connection of
this duality to a\nconjectural symmetry in link homology. Based on joint
work with Matt\nHogancamp.\n
DTSTART;TZID=America/New_York:20201120T170000
DTEND;TZID=America/New_York:20201120T180000
LAST-MODIFIED:20201029T143124Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-16
END:VEVENT
BEGIN:VEVENT
UID:c359a565-06ac-4d4a-8c54-b2fe8f9bb1c8
DTSTAMP:20201203T104601Z
CREATED:20201027T162402Z
DESCRIPTION:Topic: Perverse sheaves on configuration spaces\, Hopf algebras
and parabolic induction\n\nSpeakers: Mikhail Kapranov\n\nAffiliation: Kav
li Institute for the Physics and Mathematics of the Universe\, University
of Tokyo\n\nThe problem of classification of perverse sheaves on the quoti
ent\n$h/W$ for a semisimple Lie algebra $g$ has an explicit answer which\n
turns out to be related to the algebraic properties of induction and\nrest
riction operations for parabolic subalgebras in $g$. For $g=gl(n)$\nwe get
a relation between factorizing systems of perverse sheaves on\nthe symmet
ric products of the complex line and braided Hopf algebras.\nJoint work wi
th V. Schechtman.\n
DTSTART;TZID=America/New_York:20201120T183000
DTEND;TZID=America/New_York:20201120T193000
LAST-MODIFIED:20201029T143136Z
LOCATION:Wolfensohn Hall and Remote Access
SUMMARY:Virtual Workshop on Recent Developments in Geometric Representation
Theory
URL:https://www.ias.edu/math/events/virtual-workshop-recent-developments-ge
ometric-representation-theory-17
END:VEVENT
BEGIN:VEVENT
UID:35333c2a-4cc3-4c88-b3d6-a2110a699629
DTSTAMP:20201203T104601Z
CREATED:20200909T161833Z
DESCRIPTION:Topic: A dominant population of optically invisible massive gal
axies in the early Universe\n\nSpeakers: Discussion Leader: Sinclaire Mann
ing\n\nAffiliation: The University of Texas at Austin\n\nEach week\, we ho
ld a relatively informal seminar/discussion series\nwith an emphasis on ex
tra-galactic and large-scale structure\nastrophysics.\n\nDuring Galread a
leader/visitor presents a recent paper to the\ndiscussion group. The PDF o
f the paper is projected onto a large\nscreen\, and a guest explains the p
aper\, section by section\, in greater\ndetail than may be explained withi
n 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;TZID=America/New_York:20201123T110000
DTEND;TZID=America/New_York:20201123T120000
LAST-MODIFIED:20201123T130625Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-39
END:VEVENT
BEGIN:VEVENT
UID:06089e6a-531a-4705-9f06-cfba23f3652f
DTSTAMP:20201203T104601Z
CREATED:20200827T131449Z
DESCRIPTION:Topic: New isoperimetric inequalities for convex bodies\n\nSpea
kers: Amir Yehudayoff\n\nAffiliation: Technion - Israel Institute of Techn
ology\n\nWhat can we say on a convex body from seeing its projections? In
the\n80s\, Lutwak introduced a collection of measurements that capture thi
s\nquestion. He called them the affine quermassintegrals. They are affine
\ninvariant analogues of the classical quermassintegrals (a.k.a.\nintrinsi
c volumes) from the Brunn-Minkowski theory. Lutwak conjectured\nthat among
all convex bodies of a given volume\, they are minimized\nprecisely on el
lipsoids. The known cases of this conjecture correspond\nto the Blaschke-S
antalo and Petty projection inequalities. Petty's\ninequality\, for exampl
e\, is a strict generalization of the classical\nisoperimetric inequality.
Our main result confirms Lutwak's\nconjecture\, including a characterizat
ion of the equality cases\, in a\nsingle unified framework. Among other th
ings\, we also prove that\nellipsoids are the only local minimizers.\n\nJo
int work with Emanuel Milman.\n
DTSTART;TZID=America/New_York:20201123T111500
DTEND;TZID=America/New_York:20201123T121500
LAST-MODIFIED:20201117T203514Z
LOCATION:Remote Access Only - see link below
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-468
END:VEVENT
BEGIN:VEVENT
UID:e1aac981-c4b2-4b55-bc76-f5bc17ed89a8
DTSTAMP:20201203T104601Z
CREATED:20201120T144456Z
DESCRIPTION:Topic: Constraining the Circumbinary Disk Tilt in the KH 15D sy
stem\n\nSpeakers: Michael Poon\n\nAffiliation: University of Toronto\n\nKH
15D is a system which consists of a young\, eccentric\, eclipsing\nbinary
\, and a circumbinary disk which obscures the binary as the disk\nprecesse
s. We develop a self-consistent model that provides a\nreasonable fit to t
he photometric variability that was observed in the\nKH 15D system over th
e past more than 60 years. Our model suggests\nthat the circumbinary disk
has an inner edge r_in ≲ 1 au \, an outer\nedge r_out ∼ a few au \, and th
at the disk is misaligned relative to\nthe stellar binary by 3-15 degrees\
, with the inner edge more inclined\nthan the outer edge. The difference b
etween the inclinations (warp)\nand longitude of ascending nodes (twist) a
t the inner and outer edges\nof the disk are of order ∼10 degrees and ∼15
degrees\,\nrespectively. We also provide constraints on other properties o
f the\ndisk\, such as the precession period and surface density profile. O
ur\nwork demonstrates the power of photometric data in constraining the\np
hysical properties of planet-forming circumbinary disks.\n
DTSTART;TZID=America/New_York:20201123T121500
DTEND;TZID=America/New_York:20201123T131500
LAST-MODIFIED:20201120T174019Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-exoplanet-discussio
n-group-2
END:VEVENT
BEGIN:VEVENT
UID:f043ee81-ca94-47bc-b4c5-43c0529c5755
DTSTAMP:20201203T104601Z
CREATED:20200922T193355Z
DESCRIPTION:Topic: Tutorial on the EFT-based full-shape likelihood\n\nSpeak
ers: Misha Ivanov and collaborators\n\nAffiliation: New York University\n
\nTutorial with Misha Ivanov and collaborators\n
DTSTART;TZID=America/New_York:20201123T123000
DTEND;TZID=America/New_York:20201123T140000
LAST-MODIFIED:20201120T142309Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-25
END:VEVENT
BEGIN:VEVENT
UID:33721c35-3f46-4c63-a340-4295c3403035
DTSTAMP:20201203T104601Z
CREATED:20200924T162036Z
DESCRIPTION:Topic: Growth\, isoperimetry and Liouville property for random
walks on groups\n\nSpeakers: Anna Erschler\n\nAffiliation: École Normale S
upérieure\; Member\, School of Mathematics\n\nIn a joint work with Tianyi
Zheng we show that the growth function of\nthe first Grigorchuk group sati
sfies \[ \ln \ln v_n/\ln v_n = a\, \]\nwhere $a = \log 2/\log x$\, $x$ bei
ng a positive root of the polynomial\n$x^3-x^2-2x-4$. This is done by cons
tructing measures with controlled\ntail decay and with non-trivial Poisson
boundary. Such estimates are\nnear optimal for all Grigorchuk groups $G_w
$\, and they can be far from\nbeing optimal for some other groups. It is e
ssential that the above\nmentioned measures are infinitely supported. In c
ontrast with\nsubexponential growth groups\, where all finitely supported
measures\nhave trivial boundary\, general exponential growth groups are li
ttle\nunderstood. In a joint work with Josh Frisch we provide new criteria
\nfor solvable linear groups.\n
DTSTART;TZID=America/New_York:20201123T140000
DTEND;TZID=America/New_York:20201123T150000
LAST-MODIFIED:20201118T140554Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-344
END:VEVENT
BEGIN:VEVENT
UID:f7cb5e12-86d6-4515-9adf-a6af63c053b3
DTSTAMP:20201203T104601Z
CREATED:20200925T221722Z
DESCRIPTION:Topic: Boundary regularity and stability for spaces with Ricci
curvature bounded below\n\nSpeakers: Elia Bruè\n\nAffiliation: Member\, Sc
hool of Mathematics\n\nAn extension of Gromov compactness theorem ensures
that any family of\nmanifolds with convex boundaries\, uniform bound on th
e dimension and\nuniform lower bound on the Ricci curvature is precompact
in the\nGromov-Hausdorff topology. In this talk\, we will describe how\nbo
undaries degenerate in the limit by studying the topological and\nrectifia
ble structure of limit spaces. This is based on a joint work\nwith Aaron N
aber and Daniele Semola.\n
DTSTART;TZID=America/New_York:20201123T163000
DTEND;TZID=America/New_York:20201123T173000
LAST-MODIFIED:20201117T180813Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-127
END:VEVENT
BEGIN:VEVENT
UID:8617c4f9-2bc1-473d-ac42-94710abe59fb
DTSTAMP:20201203T104601Z
CREATED:20200827T131956Z
DESCRIPTION:Topic: Factorization through L2\, Rounding and Duality Part 2\n
\nSpeakers: Vijay Bhattiprolu\n\nAffiliation: Member\, School of Mathemati
cs\n\nLet X and Y be normed spaces. In functional analysis\, a ``theorem o
n\nfactorization through L2'' refers to the following type of\nstatement:
\n\nEvery bounded linear operator A mapping X to Y (i.e. sup_x\n||A(x)||_Y
/||x||_X < infinity)\, can be written as the composition\n(A=B.C) of bound
ed linear operators C mapping X to L2 and B mapping L2\nto Y. \n\nSuch fac
torization theorems and their variants (for various choices of\nnormed spa
ces X and Y) are useful not only in functional analysis\n(where they were
developed to study norms on tensor product spaces X\n\otimes X)\, but in s
everal areas of computer science like discrepancy\ntheory\, communication
complexity\, column subset selection and\noptimization. In this talk I wil
l discuss a generic recipe (using\nrounding+duality) for proving factoriza
tion theorems. My goal is to\nprovide a streamlined exposition of a classi
cal factorization theorem\nof Grothendieck and time permitting show a new
factorization result\nwhich has applications to quadratic maximization ove
r convex sets.\n\nBased on recent joint work with Euiwoong Lee and Assaf N
aor.\n
DTSTART;TZID=America/New_York:20201124T103000
DTEND;TZID=America/New_York:20201124T123000
LAST-MODIFIED:20201124T223216Z
LOCATION:Remote Access Only - see link below
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-463
END:VEVENT
BEGIN:VEVENT
UID:d28b3358-4730-4f76-a38f-bc3836780db6
DTSTAMP:20201203T104601Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201124T123000
DTEND;TZID=America/New_York:20201124T133000
LAST-MODIFIED:20201105T145247Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-141
END:VEVENT
BEGIN:VEVENT
UID:555ac92a-1d1d-4699-8ba4-731b8caef524
DTSTAMP:20201203T104601Z
CREATED:20201002T172455Z
DESCRIPTION:Topic: The Joyal model structure on simplicial sets and equival
ence with simplicial categories\n\nSpeakers: Linus Hamann\n\nAffiliation:
Princeton University\n\n
DTSTART;TZID=America/New_York:20201124T133000
DTEND;TZID=America/New_York:20201124T153000
LAST-MODIFIED:20201104T175739Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/events/working-group-stratified-homotopy-theory-6
END:VEVENT
BEGIN:VEVENT
UID:f5f446b6-1550-407b-b21c-89b53e5577b3
DTSTAMP:20201203T104601Z
CREATED:20201109T192336Z
DESCRIPTION:Topic: Derived Equivalences for Blocks of Cyclic Defect\n\nSpea
kers: Jay Taylor\n\nAffiliation: University of Southern California\; Membe
r\, School of Mathematics\n\n
DTSTART;TZID=America/New_York:20201124T150000
DTEND;TZID=America/New_York:20201124T170000
LAST-MODIFIED:20201109T192352Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-4
END:VEVENT
BEGIN:VEVENT
UID:d439454e-5bf0-4b9e-aab7-e97a8cadd6ea
DTSTAMP:20201203T104601Z
CREATED:20200908T220508Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Jonathan Sheehan\n\nAffiliation: Univer
sity of California\, Berkeley\, IAS\n\n
DTSTART;TZID=America/New_York:20201124T150000
DTEND;TZID=America/New_York:20201124T170000
LAST-MODIFIED:20200909T155829Z
LOCATION:Please note that this seminar will take place online via Zoom.
SUMMARY:Early Modern Europe Seminar
URL:https://www.ias.edu/events/early-modern-europe-seminar-3
END:VEVENT
BEGIN:VEVENT
UID:ce3eb879-8205-475a-8cec-26c9e48cdb7a
DTSTAMP:20201203T104601Z
CREATED:20200901T214606Z
DESCRIPTION:Topic: Approximations of groups\, subquotients of infinite dire
ct products and equations over groups\n\nSpeakers: Lev Glebsky\n\nAffiliat
ion: Universidad Autónoma de San Luis Potosí\n\nLet C be a class of groups
. (For example\, C is a class of all finite\ngroups\, or C is a class of a
ll finite symmetric groups.) I give a\ndefinition of approximations of a g
roup G by groups from C. For\nexample\, the groups approximable by symmetr
ic groups are\, by\ndefinition\, sofic groups.\n\nFor some classes C the f
ollowing result holds:\n\nG is approximable by C if and only if G is a sub
group of some quotient\nof a (infinite) direct product of groups from C.\n
\nIt also may be formulated using equations over groups. In the talk I\np
lan to explain this in details and discuss some related results and\nopen
questions.\n
DTSTART;TZID=America/New_York:20201125T110000
DTEND;TZID=America/New_York:20201125T121500
LAST-MODIFIED:20201111T185615Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Stability and Testability
URL:https://www.ias.edu/events/stability-and-testability-5
END:VEVENT
BEGIN:VEVENT
UID:52dc9edb-c58e-495d-ba43-58fb85faa9ff
DTSTAMP:20201203T104601Z
CREATED:20201008T194246Z
DESCRIPTION:Topic: No seminar: postponed to next week\n\n
DTSTART;TZID=America/New_York:20201125T150000
DTEND;TZID=America/New_York:20201125T170000
LAST-MODIFIED:20201120T172939Z
LOCATION:
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory-10
END:VEVENT
BEGIN:VEVENT
UID:73a7073f-529a-48ca-b49d-05536c51bf43
DTSTAMP:20201203T104601Z
CREATED:20200806T232058Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART;TZID=America/New_York:20201125T173000
DTEND;TZID=America/New_York:20201125T190000
LAST-MODIFIED:20201030T225549Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/events/mathematical-conversations-201
END:VEVENT
BEGIN:VEVENT
UID:faf5ca7c-0909-451a-8bc4-102b4aca0f3c
DTSTAMP:20201203T104601Z
CREATED:20201009T161541Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART;TZID=America/New_York:20201126T100000
DTEND;TZID=America/New_York:20201126T120000
LAST-MODIFIED:20201120T222514Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/events/moonshine-seminar-7
END:VEVENT
BEGIN:VEVENT
UID:7646e9a4-6d0e-4f99-a9a2-042f3847efb8
DTSTAMP:20201203T104601Z
CREATED:20201110T005520Z
DESCRIPTION:Topic: No seminar\n\n
DTSTART;TZID=America/New_York:20201126T163000
DTEND;TZID=America/New_York:20201126T173000
LAST-MODIFIED:20201110T005651Z
LOCATION:
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-245
END:VEVENT
BEGIN:VEVENT
UID:deaca5b9-005d-4438-8549-385a201af4ba
DTSTAMP:20201203T104601Z
CREATED:20200901T215804Z
DESCRIPTION:Topic: Three 20 minute research talks\n\nSpeakers: Yu-Wei Fan\,
Surena Hozoori\, Marcelo Atallah\n\nAffiliation: University of California
\, Berkeley\; Georgia Institute of Technology\; University of Montreal\n\n
YU-WEI FAN (BERKELEY)_\, __Shifting numbers in triangulated categories_\n_
_\n_Abstract:_ One can consider endofunctors of triangulated categories\n
as categorical dynamical systems\, and study their long term behaviors\nun
der large iterations. There are (at least) three natural invariants\nthat
one can associate to endofunctors from the dynamical perspective:\ncategor
ical entropy\, and upper/lower shifting numbers. We will recall\nsome back
ground on categorical dynamical systems and categorical\nentropy\, and int
roduce the notion of shifting numbers\, which measure\nthe asymptotic amou
nt by which an endofunctor of a triangulated\ncategory translates inside t
he category. The shifting numbers are\nanalogous to Poincare translation n
umbers. We additionally establish\nthat in some examples the shifting numb
ers provide a quasimorphism on\nthe group of autoequivalences. Joint work
with Simion Filip.\n\nSURENA HOZOORI (GEORGIA TECH)\, _Symplectic Geometry
of Anosov Flows in\nDimension 3 and Bi-Contact Topology_\n \n_Abstract:_
We give a purely contact and symplectic geometric\ncharacterization of Ano
sov flows in dimension 3 and set up a framework\nto use tools from contact
and symplectic geometry and topology in the\nstudy of questions about Ano
sov dynamics. If time permits\, we will\ndiscuss some uniqueness results f
or the underlying (bi-) contact\nstructure for an Anosov flow\, and/or a c
haracterization of Anosovity\nbased on Reeb flows.\n\nMARCELO ATALLAH (MON
TREAL) TBA.\n
DTSTART;TZID=America/New_York:20201127T091500
DTEND;TZID=America/New_York:20201127T104500
LAST-MODIFIED:20201113T011011Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-21
END:VEVENT
BEGIN:VEVENT
UID:a267696c-3fe4-4125-ac3a-1c341d2e3fe4
DTSTAMP:20201203T104601Z
CREATED:20201113T144502Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Romain Meyrand\n\nAffiliation: Universi
ty of Otago\n\nTime: TBA\n
DTSTART;TZID=America/New_York:20201127T120000
DTEND;TZID=America/New_York:20201127T120000
LAST-MODIFIED:20201113T144811Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-0
END:VEVENT
BEGIN:VEVENT
UID:253b62c9-11a4-4e8d-a445-33ce128a2e1b
DTSTAMP:20201203T104601Z
CREATED:20200909T161908Z
DESCRIPTION:Topic: Quantifying the impact of the Large Magellanic Cloud on
the structure of the Milky Way's dark matter halo using Basis Function Exp
ansions\n\nSpeakers: Discussion Leader: Nicolas Garavito \n\nAffiliation:
University of Arizona\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;TZID=America/New_York:20201130T110000
DTEND;TZID=America/New_York:20201130T120000
LAST-MODIFIED:20201130T133925Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-40
END:VEVENT
BEGIN:VEVENT
UID:2dc72587-beb5-4da8-964b-d475afe4df27
DTSTAMP:20201203T104601Z
CREATED:20200827T125037Z
DESCRIPTION:Topic: Thresholds for Random Subspaces\, aka\, LDPC Codes Achie
ve List-Decoding Capacity\n\nSpeakers: Mary Wootters\n\nAffiliation: Stanf
ord University\n\nWhat combinatorial properties are likely to be satisfied
by a random\nsubspace over a finite field? For example\, is it likely tha
t not too\nmany points lie in any Hamming ball of fixed radius? What about
any\ncombinatorial rectangle of fixed side length? We give a simple\ncha
racterization of the threshold on the dimension below which this is\nvery
likely and above which this is very unlikely. Our motivation\ncomes from e
rror correcting codes\, and we use this characterization to\nestablish the
list-decodability of random Low Density Parity-Check\n(LDPC) codes\, up t
o list-decoding capacity.\n\nThis talk is based on the joint work with Jon
athan Mosheiff\, Nicolas\nResch\, Noga Ron-Zewi\, and Shashwat Silas.\n
DTSTART;TZID=America/New_York:20201130T111500
DTEND;TZID=America/New_York:20201130T121500
LAST-MODIFIED:20201130T201247Z
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-469
END:VEVENT
BEGIN:VEVENT
UID:4f80251b-015c-44ee-91b8-f54053a0265f
DTSTAMP:20201203T104601Z
CREATED:20201123T131849Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART;TZID=America/New_York:20201130T121500
DTEND;TZID=America/New_York:20201130T131500
LAST-MODIFIED:20201123T132407Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-exoplanet-discussio
n-group-3
END:VEVENT
BEGIN:VEVENT
UID:52fe2730-cec6-4261-8cec-f6563abc0a71
DTSTAMP:20201203T104601Z
CREATED:20200922T193458Z
DESCRIPTION:Topic: Topic 1: Galaxy Power Spectrum in General Relativity Top
ic 2: Towards the ultimate cosmological estimator\n\nSpeakers: Nastassia G
rimm\, Francisco Villaescusa-Navarro\n\nAffiliation: Speaker 1: University
of Zurich Speaker 2: Princeton University\n\nTopic 1: In this talk\, I pr
esent the impact of general relativistic\neffects on the galaxy power spec
trum. After introducing the full\ngeneral relativistic expression for the
galaxy number density\, I\ndefine the theory power spectrum and describe i
ts relation to\nobservations. Then\, I discuss the issue of infrared diver
gence\, as\ngeneral relativistic effects have previously been believed to
cause a\ndivergent signal contaminating the measurement of primordial\nnon
-Gaussianity. I show that there is\, in fact\, no infrared\ndivergence\, a
s this unphysical behaviour vanishes when accounting for\nall general rela
tivistic effects consistently. Finally\, I present our\nnumerical computat
ion of the full galaxy power spectrum\, showing the\ndeviations from the s
tandard prediction caused by the presence of\nnon-divergent terms from rel
ativistic corrections. I conclude that\, as\nrelativistic effects lead to
significant corrections at low k\, they\nneed to be taken into account in
the analysis of large-scale data.\n\nTopic 2: In order to maximize the sci
entific return of cosmological\nsurveys we need an estimator that extracts
all information from the\nfield while marginalizing over uncertain baryon
ic effects. In this\ntalk I will show how neural networks can find that es
timator.\n
DTSTART;TZID=America/New_York:20201130T123000
DTEND;TZID=America/New_York:20201130T140000
LAST-MODIFIED:20201125T155549Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-26
END:VEVENT
BEGIN:VEVENT
UID:c28edf78-fbc5-4bb9-af02-894622726bb4
DTSTAMP:20201203T104601Z
CREATED:20200924T162040Z
DESCRIPTION:Topic: Support Varieties for Modular Representations\n\nSpeaker
s: Eric M. Friedlander\n\nAffiliation: University of Southern California\;
Member\, School of Mathematics\n\nWe present an overview of elementary me
thods to study extensions of\nmodular representations of various types of
'groups'. We shall begin\nby discussing actions of an elementary abelian $
p$-group\, $E =\n(Z/p)^r$\, on finite dimensional vector spaces over a fie
ld $k$ of\ncharacteristic $p > 0$. This leads us to the broader study of t
he\nrepresentations of a restricted Lie algebra $g$ on $k$-vector spaces.
\nWe briefly mention how the questions raised and the techniques\ndevelope
d can be extended to modular representations of an arbitrary\nfinite group
scheme over $k$. We then look more closely at the context\nof modular rep
resentations of an arbitrary finite group.\n
DTSTART;TZID=America/New_York:20201130T140000
DTEND;TZID=America/New_York:20201130T150000
LAST-MODIFIED:20201130T201335Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-345
END:VEVENT
BEGIN:VEVENT
UID:30879f61-050d-4b25-82d1-f9d485007bc0
DTSTAMP:20201203T104601Z
CREATED:20200925T221728Z
DESCRIPTION:Topic: Sharp nonuniqueness for the Navier-Stokes equations\n\nS
peakers: Xiaoyutao Luo\n\nAffiliation: Duke University\n\nFor the incompre
ssible Navier-Stokes equations\, classical results\nstate that weak soluti
ons are unique in the so-called\nLadyzhenskaya-Prodi-Serrin regime. A scal
ing analysis suggests that\nclassical uniqueness results are sharp\, but c
urrent nonuniqueness\nconstructions are far below the critical threshold.
In this talk\, we\nshow the nonuniqueness of weak solutions near a borderl
ine of the\nLadyzhenskaya-Prodi-Serrin regime. In particular\, we construc
t a class\nof non-Leray-Hopf weak solutions that are smooth outside a set
of\narbitrarily small Hausdorff dimension in time. Joint work with Alexey
\nCheskidov.\n
DTSTART;TZID=America/New_York:20201130T163000
DTEND;TZID=America/New_York:20201130T173000
LAST-MODIFIED:20201201T013414Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-128
END:VEVENT
BEGIN:VEVENT
UID:eb15479e-0f39-4c77-b98e-1a44d81d5a2d
DTSTAMP:20201203T104601Z
CREATED:20200827T132021Z
DESCRIPTION:Topic: Getting the most from our data\n\nSpeakers: Paul Valiant
\n\nAffiliation: Member\, School of Mathematics\n\nI will discuss techniqu
es\, structural results\, and open problems from\ntwo of my recent papers\
, in the context of a broader area of work on\nthe motivating question: 'h
ow do we get the most from our data?'\n\nIn the first part of the talk\, I
will revisit the basic statistical\nproblem of estimating the mean of a r
eal-valued distribution. I will\nintroduce an estimator with the guarantee
that 'our estimator\, on\n*any* distribution\, is as accurate as the samp
le mean is for the\nGaussian distribution of matching variance.' Crucially
\, in contrast to\nprior works\, our estimator does not require prior know
ledge of the\nvariance\, and works across the entire gamut of distribution
s with\nfinite variance\, including those without any higher moments.\nPar
ameterized by the sample size $n$\, the failure probability\n$\delta$\, an
d the variance $\sigma^2$\, our estimator is accurate to\nwithin $\sigma\c
dot(1+o(1))\sqrt{\frac{2\log\frac{1}{\delta}}{n}}$\,\nwhich is tight up to
the $1+o(1)$ factor.\n\nIn the second part of the talk I will introduce a
framework for\nstatistical estimation that leverages knowledge of how sam
ples are\ncollected but makes no distributional assumptions on the data va
lues.\nAs a motivating example: suppose one wishes to conduct an accurate
\npolitical poll of a population\, estimating the fraction of the\npopulat
ion that would answer 'yes' to a certain question\; however\, one\ndoes no
t have access to uniformly random people from the population\,\nbut instea
d only has access to a set of people S drawn from some\ndistribution D\, a
distribution on subsets of the population. For\nexample\, D could describ
e a viral process on a social network\, where\nrespondents are the - highl
y correlated - set of people that the viral\nprocess has reached by a give
n time. How can knowledge of the\ndistribution D\, combined with the actua
l sampled set S and their\nsurvey responses\, best be used to estimate the
true population mean?\nOur model encompasses the fact that people's surve
y responses may be\nintricately correlated with their probability of being
in S. We\npresent an efficient $\pi/2$ approximation to this general clas
s of\nquestions\, via a surprising connection to the Grothendieck problem.
\n
DTSTART;TZID=America/New_York:20201201T103000
DTEND;TZID=America/New_York:20201201T123000
LAST-MODIFIED:20201201T150430Z
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-464
END:VEVENT
BEGIN:VEVENT
UID:a2f62683-e5e2-4767-9da9-d19589c5c9bf
DTSTAMP:20201203T104601Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201201T123000
DTEND;TZID=America/New_York:20201201T133000
LAST-MODIFIED:20201105T145323Z
LOCATION:Virtual Event
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-142
END:VEVENT
BEGIN:VEVENT
UID:35e9a538-1c7c-45d8-92c0-9b0af0800bde
DTSTAMP:20201203T104601Z
CREATED:20201002T172503Z
DESCRIPTION:Topic: Cartesian fibrations\n\nSpeakers: Arpon Raksit\n\nAffili
ation: Stanford University\n\n
DTSTART;TZID=America/New_York:20201201T133000
DTEND;TZID=America/New_York:20201201T153000
LAST-MODIFIED:20201104T175834Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/events/working-group-stratified-homotopy-theory-7
END:VEVENT
BEGIN:VEVENT
UID:bc9976fb-c6d2-4ef3-8faa-74ebe0116a44
DTSTAMP:20201203T104601Z
CREATED:20201109T192354Z
DESCRIPTION:Topic: The ABG Equivalence\n\nSpeakers: Pablo Boixeda Alvarez\n
\nAffiliation: Member\, School of Mathematics\n\nBroue's Conjecture for $S
L_2(\mathbb{F}_q)$ in defining\ncharacteristic\, predicts a derived equiva
lence between the principal\nblock of this group and the principal block o
f a Borel. A structurally\nsimilar equivalence exist in the case of the al
gebraic group\nrepresentations. I will give an overview of this equivalenc
e for the\nalgebraic group $SL_2$ and I compare some basic similarities be
tween\nthis and the derived equivalences for $SL_2(\mathbb{F}_p)$ presente
d\nlast week.\n
DTSTART;TZID=America/New_York:20201201T150000
DTEND;TZID=America/New_York:20201201T170000
LAST-MODIFIED:20201130T215358Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-5
END:VEVENT
BEGIN:VEVENT
UID:5b7e5972-4c27-445f-9661-5e38dbad8f33
DTSTAMP:20201203T104601Z
CREATED:20200901T214630Z
DESCRIPTION:Topic: Stability\, cohomology vanishing\, and non-approximable
groups\n\nSpeakers: Andreas Thom\n\nAffiliation: University of Dresden\n\n
Several well-known open questions (such as: are all groups\nsofic/hyperlin
ear?) have a common form: can all groups be approximated\nby asymptotic ho
momorphisms into the symmetric groups $Sym(n)$ (in the\nsofic case) or the
finite dimensional unitary groups $U(n)$ (in the\nhyperlinear case)? In t
he case of $U(n)$\, the question can be asked\nwith respect to different m
etrics and norms. We answers\, for the first\ntime\, one of these versions
\, showing that there exist fintely\npresented groups which are not approx
imated by $U(n)$ with respect to\nthe Frobenius nor. Our strategy is to sh
ow that some higher\ndimensional cohomology vanishing phenomena imply stab
ility\, that is\,\nevery Frobenius-approximate homomorphism into finite-di
mensional\nunitary groups is close to an actual homomorphism. This is comb
ined\nwith existence results of certain non-residually finite central\next
ensions of lattices in some simple $p$-adic Lie groups. These\ngroups act
on high rank Bruhat-Tits buildings and satisfy the needed\nvanishing cohom
ology phenomenon and are thus stable and not\nFrobenius-approximated.\n
DTSTART;TZID=America/New_York:20201202T110000
DTEND;TZID=America/New_York:20201202T121500
LAST-MODIFIED:20201120T221536Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Stability and Testability
URL:https://www.ias.edu/events/stability-and-testability-6
END:VEVENT
BEGIN:VEVENT
UID:2d1e08b2-cd62-4d8e-badd-a7b88bfd1a01
DTSTAMP:20201203T104601Z
CREATED:20201008T194254Z
DESCRIPTION:Topic: Geometric Satake equivalence: a historical survey\n\nSpe
akers: George Lusztig\n\nAffiliation: Massachusetts Institute of Technolog
y\; Member\, School of Mathematics\n\nBefore the 'geometric Satake equival
ence' there was a decategorified\nversion of it which however contained mo
st of its essential features.\nIn my talk I will talk about some of the id
eas which have led to this\ntheory. In particular I will explain the conne
ction with modular\nrepresentations.\n
DTSTART;TZID=America/New_York:20201202T150000
DTEND;TZID=America/New_York:20201202T170000
LAST-MODIFIED:20201120T172749Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory-11
END:VEVENT
BEGIN:VEVENT
UID:b8b7739d-db56-46a4-a29d-a0f4028c125c
DTSTAMP:20201203T104601Z
CREATED:20200806T232026Z
DESCRIPTION:Topic: Isolated points on curves\n\nSpeakers: Bianca Viray\n\nA
ffiliation: University of Washington\n\nLet $C$ be an algebraic curve over
the rational numbers\, that is\, a\n1-dimensional complex manifold that i
s defined by polynomial equations\nwith rational coefficients. A celebrate
d result of Faltings implies\nthat all algebraic points on $C$ come in fam
ilies of bounded degree\,\nwith finitely many exceptions. These exceptions
are known as isolated\npoints. We explore how these isolated points behav
e in families of\ncurves and deduce consequences for the arithmetic of ell
iptic curves.\nThis talk is on joint work with A. Bourdon\, Ö. Ejder\, Y.
Liu\, and F.\nOdumodu.\n
DTSTART;TZID=America/New_York:20201202T173000
DTEND;TZID=America/New_York:20201202T190000
LAST-MODIFIED:20201125T144142Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/events/mathematical-conversations-200
END:VEVENT
BEGIN:VEVENT
UID:401e947c-718f-42ee-9112-9ceb26f61558
DTSTAMP:20201203T104601Z
CREATED:20201009T161548Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201203T100000
DTEND;TZID=America/New_York:20201203T120000
LAST-MODIFIED:20201015T175743Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/events/moonshine-seminar-8
END:VEVENT
BEGIN:VEVENT
UID:7f2a53f9-9ddf-4569-9caf-bc60b776074c
DTSTAMP:20201203T104601Z
CREATED:20200708T175157Z
DESCRIPTION:Topic: Characterizing the Architectures of Planetary Population
s with Kepler and Next-Generation Doppler Surveys\n\nSpeakers: Eric Ford\n
\nAffiliation: Institute for Advanced Study\, Penn State University\n\nNAS
A's Kepler mission conducted a large survey of planetary systems. \nRecent
ly\, we have advanced from measuring occurrence rates as a\nfunction of pl
anet size and period to characterizing the intrinsic\ndistribution of plan
etary system architectures. We have learned much\nabout inner planetary s
ystems with low mutual inclinations\, but\nthere's still much to learn abo
ut systems with moderate to large\nmutual inclinations. A new generation
of extremely precise radial\nvelocity (EPRV) surveys is well-positioned to
characterize such\nsystems. I will describe recent progress in helping E
PRV\nsurveys to characterize potential Earth-analogs in the presence of\nr
ealistic levels of stellar variability. Finally\, I will compare\noptimis
tic and pessimistic scenarios\nfor next-generation EPRV surveys and the im
plications\nfor resolving questions about planetary architectures raised f
rom\nKepler.\n
DTSTART;TZID=America/New_York:20201203T110000
DTEND;TZID=America/New_York:20201203T120000
LAST-MODIFIED:20201201T200407Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/events/institute-advanced-study-astrophysics-semina
r-283
END:VEVENT
BEGIN:VEVENT
UID:fe9a852a-28a5-4646-9972-a0a4d14bce65
DTSTAMP:20201203T104601Z
CREATED:20200923T172412Z
DESCRIPTION:Topic: A unitary analogy of Friedberg-Jacquet and Guo-Jacquet p
eriods and central values of standard L functions on GL(2n)\n\nSpeakers: J
ingwei Xiao\n\nAffiliation: Institute for Advanced Study and Princeton Uni
versity\; Veblen Research Instructor\, School of Mathematics\n\nLet $G$ be
a reductive group over a number field $F$ and $H$ a\nsubgroup. Automorphi
c periods study the integrals of cuspidal\nautomorphic forms on $G$ over $
H(F)\backslash H(A_F)$. They are often\nrelated to special values of certa
in L functions. One of the most\nnotable case is when $(G\,H)=(U(n+1) \tim
es U(n)\, U(n))$\, and these\nperiods are related to central values of Ran
kin-Selberg L functions on\n$GL(n+1) \times GL(n)$. In this talk\, I will
explain my work in\nprogress with Wei Zhang that studies central values of
standard L\nfunctions on $GL(2n)$ using $(G\,H)=(U(2n)\, U(n)\times U(n))
$ and some\nvariants. I shall explain the conjecture and a relative trace
formula\napproach to study it. We prove the required fundamental lemma usi
ng a\nlimit of the Jacquet-Rallis fundamental lemma and Hironaka’s\ncharac
terization of spherical functions on the space of non degenerate\nHermitia
n matrices. Also\, the question admits an arithmetic analogy.\n
DTSTART;TZID=America/New_York:20201203T163000
DTEND;TZID=America/New_York:20201203T173000
LAST-MODIFIED:20201130T215828Z
LOCATION:
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-242
END:VEVENT
BEGIN:VEVENT
UID:beff434e-b366-41fa-92f5-e23c16191ee6
DTSTAMP:20201203T104601Z
CREATED:20200901T215827Z
DESCRIPTION:Topic: The singular Weinstein conjecture and the Contact/Beltra
mi mirror\n\nSpeakers: Eva Miranda\n\nAffiliation: Universitat Politècnic
a de Catalunya\n\nIn this talk\, I will address the (singular) Weinstein c
onjecture about\nthe existence of (singular) periodic orbits of Reeb vecto
r fields on\ncompact manifolds endowed with singular contact forms. Our mo
tivating\nexamples come from Celestial mechanics (restricted three-body pr
oblem)\nwhere contact topology techniques were already successful in\ndete
rmining the existence of periodic orbits (Albers-Frauenfelder-Van\nKoert-P
aternain). With the aim of completing this understanding\, we\ndeal with t
he restricted three body example by adding the so-called\n'infinity set' (
via a McGehee regularization). This induces a\nsingularity on the contact
structure which permeates the geometry and\ntopology of the problem. Hofer
's fine techniques to prove the\nWeinstein conjecture for overtwisted 3-di
mensional contact manifolds\ncan be adapted in this singular set-up under
some symmetry assumptions\nclose to the singular set (which also work for
the non-compact case).\nWe prove the existence of infinite smooth Reeb per
iodic orbits on the\n(compact) critical set of the contact form. This crit
ical set can\noften be identified with the collision set or set at infinit
y in the\nmotivating examples from Celestial mechanics. In those examples\
,\nescape trajectories can be often compactified as singular periodic\norb
its. Time permitting\, we will end up this talk proving the\nexistence of
escape orbits and generalized singular periodic orbits\nfor 3-dimensional
singular contact manifolds under some mild\nassumptions. Our theory benefi
ts in a great manner from the existence\nof a correspondence (up to repara
metrization) between Reeb and\nBeltrami vector fields (Etnyre and Ghrist)
which can be exported to\nthis singular set-up. In particular\, Uhlenbeck'
s genericity results\nfor the eigenfunctions of the Laplacian is a key poi
nt of the proof.\n\nThe contents of this talk are based on joint works wit
h Cédric Oms\nand Daniel Peralta-Salas.\n
DTSTART;TZID=America/New_York:20201204T091500
DTEND;TZID=America/New_York:20201204T104500
LAST-MODIFIED:20201113T011146Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-22
END:VEVENT
BEGIN:VEVENT
UID:ddcefadb-d091-457b-ad14-bba79302e49c
DTSTAMP:20201203T104601Z
CREATED:20201120T194802Z
DESCRIPTION:Topic: The Book and the Silk Roads: Corralling Data in the Digi
tal Workspace\n\nSpeakers: SUZANNE AKBARI\, Professor of Medieval Studies\
,\nIAS • RACHEL DI CRESCE\, Project Librarian\, The Book and the Silk\nRoa
ds • JESSICA LOCKHART\, Director of Research\, The Book and the\nSilk Road
s • J. D. SARGAN\, Leverhulme Research Fellow\, Old Books\,\nNew Science L
ab\n\n“The Book and the Silk Roads” project seeks to build and support a\n
growing international network of scholars\, curators\, conservators\, and
\nscientists exploring significant developments in writing technologies\nw
ithin a range of contexts\, focusing particularly on examples of\nconverge
nt evolution and interchange across the pre-modern world\, from\nEast Asia
to Mesoamerica. In our presentation we will address how we\nhave handled
the technical challenge underlying this research agenda:\nhow to bring dif
ferent sets of heterogeneous data together in a\nuser-friendly way\, while
making use of standardized data sharing\nframeworks to ensure it is open
and reusable both across and outside\nof our tools. Register in advance HE
RE\n[https://theias.zoom.us/meeting/register/tZUudO-uqz4rEtL8qqXZ9gjnaFaFd
r8yU8Az]. After\nregistering\, you will receive a confirmation email with
information\nabout joining the meeting. \n
DTSTART;TZID=America/New_York:20201204T120000
DTEND:
LAST-MODIFIED:20201120T200252Z
LOCATION:ZOOM Meeting
SUMMARY:Digital Scholarship Conversations
URL:https://www.ias.edu/digital-scholarship/events/digital-scholarship-conv
ersations-0
END:VEVENT
BEGIN:VEVENT
UID:ae18cc80-4955-4599-a9bb-7a70fe7d5412
DTSTAMP:20201203T104601Z
CREATED:20200820T173109Z
DESCRIPTION:Topic: Raytracing and raymarching simulations of non-euclidean
geometries\n\nSpeakers: Henry Segerman\n\nAffiliation: Oklahoma State Univ
ersity\n\nI'll talk about two related projects\, with two different groups
\, both\naiming to see three-dimensional manifolds 'from the inside'. That
is\,\nwe generate images assuming that light travels along geodesics in t
he\ngeometry of the manifold. The first project\, with Rémi Coulon\,\nSabe
tta Matsumoto\, and Steve Trettel\, uses ray-marching to generate\nthe ins
ide-view in all eight Thurston geometries. I'll explain the\nray-marching
technique\, and some aspects of our implementation. The\nsecond project\,
with David Bachman\, Matthias Goerner\, and Saul\nSchleimer\, visualizes '
cohomology fractals' in hyperbolic\nthree-manifolds. These images come fro
m cohomology classes in the\nmanifold\, and are closely related to the sph
ere-filling curves\ndiscovered by Cannon and Thurston.\n
DTSTART;TZID=America/New_York:20201204T140000
DTEND;TZID=America/New_York:20201204T153000
LAST-MODIFIED:20201120T191754Z
LOCATION:Remote Access Only
SUMMARY:Workshop on Topology: Identifying Order in Complex Systems
URL:https://www.ias.edu/events/workshop-topology-identifying-order-complex-
systems-130
END:VEVENT
BEGIN:VEVENT
UID:9bbc2256-c3d1-4204-a062-a019c89449a8
DTSTAMP:20201203T104601Z
CREATED:20200909T162155Z
DESCRIPTION:Topic: The VIRUS-P Exploration of Nearby Galaxies (VENGA): The
stellar populations and assembly of NGC 2903's bulge\, bar\, and outer dis
c\n\nSpeakers: Andreia Carrillo\n\nAffiliation: University of Texas\, Aust
in\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;TZID=America/New_York:20201207T110000
DTEND;TZID=America/New_York:20201207T120000
LAST-MODIFIED:20201103T200619Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-41
END:VEVENT
BEGIN:VEVENT
UID:2121405e-03e2-4212-a0b2-23e6d4ae9b8b
DTSTAMP:20201203T104601Z
CREATED:20200827T131517Z
DESCRIPTION:Topic: Extractor-based Approach to Proving Memory-Sample Lower
Bounds for Learning\n\nSpeakers: Sumegha Garg\n\nAffiliation: Harvard Univ
ersity\n\nA recent line of work has focused on the following question: Can
one\nprove strong unconditional lower bounds on the number of samples\nne
eded for learning under memory constraints? We study an\nextractor-based a
pproach to proving such bounds for a large class of\nlearning problems as
follows.\n\nA matrix M: A x X -> {-1\,1} corresponds to the following lear
ning\nproblem: An unknown function f in X is chosen uniformly at random. A
\nlearner tries to learn f from a stream of samples\, (a_1\, b_1)\, (a_2\,
\nb_2) ...\, where for every i\, a_i in A is chosen uniformly at random\na
nd b_i = M(a_i\,f). Assume that k\, l\, r are such that any submatrix of\n
M\, with at least 2^{-k}|A| rows and at least 2^{-l}|X| columns\, has a\nb
ias of at most 2^{-r} (extractor property).\n\nWe show that any learning a
lgorithm for the learning problem\ncorresponding to M requires either a me
mory of size at least Ω(k l)\,\nor at least 2^{Ω(r)} samples. We also exte
nd the lower bounds to a\nlearner that is allowed two passes over the stre
am of samples. In\nparticular\, we show that any two-pass algorithm for le
arning parities\nof size n requires either a memory of size Ω(n^{3/2}) or
at least\n2^{Ω(n^{1/2})} samples. An open question would be to go beyond t
hese\ntechniques to prove such memory-sample tradeoffs.\n\nJoint works wit
h Ran Raz and Avishay Tal.\n
DTSTART;TZID=America/New_York:20201207T111500
DTEND;TZID=America/New_York:20201207T121500
LAST-MODIFIED:20201123T191243Z
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-470
END:VEVENT
BEGIN:VEVENT
UID:dda1dcac-7d4b-413c-ba99-5caf49387597
DTSTAMP:20201203T104601Z
CREATED:20200922T193545Z
DESCRIPTION:Second Speaker / Discussion Leader: Giovanni Cabass\, Member\,
School of\nNatural Sciences\n
DTSTART;TZID=America/New_York:20201207T123000
DTEND;TZID=America/New_York:20201207T140000
LAST-MODIFIED:20201016T194851Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-27
END:VEVENT
BEGIN:VEVENT
UID:16d1bc42-04a1-4448-9124-705bc408768a
DTSTAMP:20201203T104601Z
CREATED:20200924T162044Z
DESCRIPTION:Topic: NP-hard problems naturally arising in knot theory\n\nSpe
akers: Anastasiia Tsvietkova\n\nAffiliation: Rutgers University\n\nLow-dim
ensional topology and geometry have many problems with an easy\nformulatio
n\, but a hard solution. Despite our intuitive feeling that\nthese problem
s are 'hard'\, lower or upper bounds on algorithmic\ncomplexity are known
only for some of them. Recently\, several problems\nthat lie at the heart
of classical knot theory were shown to be\nNP-hard. We will discuss the pr
oblems related to unlinking and\nsplitting by crossing changes\, to Reidem
eister moves\, and to detecting\nsublinks with various properties. Based o
n joint work with Dale\nKoenig.\n
DTSTART;TZID=America/New_York:20201207T140000
DTEND;TZID=America/New_York:20201207T150000
LAST-MODIFIED:20201130T220047Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-346
END:VEVENT
BEGIN:VEVENT
UID:3e511bc7-7740-467b-82e0-85a85313894d
DTSTAMP:20201203T104601Z
CREATED:20200925T221737Z
DESCRIPTION:Topic: Stability of discontinuous solutions for inviscid compre
ssible flows\n\nSpeakers: Alexis Vasseur\n\nAffiliation: University of Tex
as\, Austin\n\nWe will discuss recent developments of the theory of a-cont
raction\nwith shifts to study the stability of discontinuous solutions of
\nsystems of equations modeling inviscid compressible flows\, like the\nco
mpressible Euler equation.\n
DTSTART;TZID=America/New_York:20201207T163000
DTEND;TZID=America/New_York:20201207T173000
LAST-MODIFIED:20201130T221027Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-129
END:VEVENT
BEGIN:VEVENT
UID:37650323-d009-4c06-aecd-789eb2d5e141
DTSTAMP:20201203T104601Z
CREATED:20200827T132041Z
DESCRIPTION:Topic: High Dimensional Expanders and Ramanujan Complexes\n\nSp
eakers: Alexander Lubotzky\n\nAffiliation: Hebrew University\n\nExpander g
raphs in general\, and Ramanujan graphs in particular\, have\nplayed an im
portant role in computer science and pure mathematics in\nthe last four de
cades. In recent years the area of high dimensional\nexpanders (i.e. simpl
ical complexes with properties generalizing those\nof expanding graphs) an
d Ramanujan complexes is starting to emerge.\nThe various motivations of t
his subarea will be surveyed: these\ninclude connections and applications
to cohomology and Gromov's\noverlapping problem on the pure math side and
to property testing and\nerror correcting codes on the CS side.\n
DTSTART;TZID=America/New_York:20201208T103000
DTEND;TZID=America/New_York:20201208T123000
LAST-MODIFIED:20201130T192805Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-465
END:VEVENT
BEGIN:VEVENT
UID:3674e87d-c70e-4494-ba2b-455037cdff57
DTSTAMP:20201203T104601Z
CREATED:20201002T172510Z
DESCRIPTION:Topic: Cartesian model structure and marked simplicial sets\n\n
Speakers: Carlos Tschudi Simpson\n\nAffiliation: CNRS\, Université de Nice
Sophia Antipolis\; Visiting Professor\, School of Mathematics\n\n
DTSTART;TZID=America/New_York:20201208T133000
DTEND;TZID=America/New_York:20201208T153000
LAST-MODIFIED:20201201T032041Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/events/working-group-stratified-homotopy-theory-8
END:VEVENT
BEGIN:VEVENT
UID:5cb81539-f014-45c7-951c-d353997d0bea
DTSTAMP:20201203T104601Z
CREATED:20201109T192416Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201208T150000
DTEND;TZID=America/New_York:20201208T170000
LAST-MODIFIED:20201109T192432Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-6
END:VEVENT
BEGIN:VEVENT
UID:e926f390-f4b4-4738-840d-10a935f40d46
DTSTAMP:20201203T104601Z
CREATED:20200901T214658Z
DESCRIPTION:Topic: Vanishing of cohomology for groups acting on buildings\n
\nSpeakers: Izhar Oppenheim\n\nAffiliation: Ben Gurion University\n\nIn hi
s seminal paper from 1973\, Garland introduced a machinery for\nproving va
nishing of group cohomology for groups acting on Bruhat-Tits\nbuildings. T
his machinery\, known today as “Garland’s method”\,\nhad several applicati
ons as a tool for proving rigidity results (e.g.\,\nproving Kazhdan proper
ty (T) or\, more recently\, group stability\nresults). In my talk\, I will
introduce a variation of Garland’s\nmethod\, explain how it yields vanish
ing cohomology and how it can be\ngeneralized to vanishing of cohomology w
ith Banach coefficients. Parts\nof this talk are based on joint works with
Z. Grinbaum-Reizis and A.\nLubotzky.\n
DTSTART;TZID=America/New_York:20201209T110000
DTEND;TZID=America/New_York:20201209T121500
LAST-MODIFIED:20201125T150255Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Stability and Testability
URL:https://www.ias.edu/events/stability-and-testability-7
END:VEVENT
BEGIN:VEVENT
UID:d06d6b41-d016-4298-881d-043ab49586b6
DTSTAMP:20201203T104601Z
CREATED:20201008T194301Z
DESCRIPTION:Topic: Lefschetz operators\, Hodge-Riemann forms\, and represen
tations\n\nSpeakers: Peter Fiebig\n\nAffiliation: Friedrich-Alexander-Univ
ersität Erlangen-Nürnberg\; Member\, School of Mathematics\n\nMotivated by
a formal similarity between the Hard Lefschetz theorem\nand the geometric
Satake equivalence we study vector spaces that are\ngraded by a weight la
ttice and are endowed with linear operators in\nsimple root directions. We
allow field coefficients in characteristics\ndifferent from 2. In the cas
e that a “Hodge-Riemann form” exists\,\nthe operators (and the grading) yi
eld a semisimple representation of\nthe associated Lie algebra. We then ex
plore the analogous theory with\nthe field replaced by the ring of p-adic
integers. In this setup we\nobtain tilting modules for the associated alge
braic group.\n
DTSTART;TZID=America/New_York:20201209T150000
DTEND;TZID=America/New_York:20201209T170000
LAST-MODIFIED:20201202T222357Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory-12
END:VEVENT
BEGIN:VEVENT
UID:e559ab3c-d788-4349-9f55-87e66c96659c
DTSTAMP:20201203T104601Z
CREATED:20200806T232156Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Cynthia Vinzant\n\nAffiliat
ion: North Carolina State University\; von Neumann Fellow\, School of Math
ematics\n\n
DTSTART;TZID=America/New_York:20201209T173000
DTEND;TZID=America/New_York:20201209T190000
LAST-MODIFIED:20201030T232526Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/events/mathematical-conversations-203
END:VEVENT
BEGIN:VEVENT
UID:3018b9fa-bfeb-42e6-857f-97ff2d22a9af
DTSTAMP:20201203T104601Z
CREATED:20201009T161556Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201210T100000
DTEND;TZID=America/New_York:20201210T120000
LAST-MODIFIED:20201015T175748Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/events/moonshine-seminar-9
END:VEVENT
BEGIN:VEVENT
UID:942e7678-eaa9-48e6-8ca4-052ff3e8aeaf
DTSTAMP:20201203T104601Z
CREATED:20200923T172415Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Joni Teräväinen\n\nAffiliat
ion: University of Oxford\n\n
DTSTART;TZID=America/New_York:20201210T163000
DTEND;TZID=America/New_York:20201210T173000
LAST-MODIFIED:20201110T005838Z
LOCATION:
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-243
END:VEVENT
BEGIN:VEVENT
UID:3fb75884-6a0b-46d7-b703-1d7d4ccdaee4
DTSTAMP:20201203T104601Z
CREATED:20200901T215902Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Başak Gürel\n\nAffiliation:
University of Central Florida\n\n
DTSTART;TZID=America/New_York:20201211T091500
DTEND;TZID=America/New_York:20201211T104500
LAST-MODIFIED:20201012T214152Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/events/iaspu-montreal-paris-tel-aviv-symplectic-geo
metry-zoominar-23
END:VEVENT
BEGIN:VEVENT
UID:c938baf4-f922-4ffa-bade-865bb7620daf
DTSTAMP:20201203T104601Z
CREATED:20201009T172733Z
DESCRIPTION:Topic: Application of Machine Learning to Identify Stellar Feed
back\n\nSpeakers: Duo Xu\n\nAffiliation: University of Texas\, Austin\n\nE
ach week\, we hold a relatively informal seminar/discussion series\nwith a
n emphasis on extra-galactic and large-scale structure\nastrophysics.\n\nD
uring 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 gues
t 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 discu
ssions are very friendly and\ninteractive.\n
DTSTART;TZID=America/New_York:20201214T110000
DTEND;TZID=America/New_York:20201214T120000
LAST-MODIFIED:20201103T200727Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/events/princeton-university-galread-galacticextraga
lactic-reading-group-42
END:VEVENT
BEGIN:VEVENT
UID:dfcb941f-11dc-4e3b-809c-9eda227af3cc
DTSTAMP:20201203T104601Z
CREATED:20200922T193604Z
DESCRIPTION:Topic: TBA\n\n
DTSTART;TZID=America/New_York:20201214T123000
DTEND;TZID=America/New_York:20201214T140000
LAST-MODIFIED:20201103T205848Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/events/institute-advanced-studyprinceton-university
-early-universecosmology-lunch-discussion-28
END:VEVENT
BEGIN:VEVENT
UID:f9423236-aaf8-4a3e-bc57-d98098e40033
DTSTAMP:20201203T104601Z
CREATED:20200924T162048Z
DESCRIPTION:Topic: A Feynman Approach to Dynamic Rate Markov Processes\n\nS
peakers: William A. Massey\n\nAffiliation: Princeton University\; Member\,
School of Mathematics\n\nPhysics inspired mathematics helps us understand
the random evolution\nof Markov processes. For example\, the Kolmogorov f
orward and backward\ndifferential equations that govern the dynamics of Ma
rkov transition\nprobabilities are analogous to the Schrodinger and Heisen
berg pictures\nof quantum mechanics.\n\nRichard Feynman introduced a time-
ordered operator calculus that\ncreated a third framework for quantum mech
anics and incorporates the\ntwo older quantum pictures. Applying these tec
hniques to\ntime-inhomogeneous Markov processes creates a transition proba
bility\nanalysis that reveals their fundamental sample path structure.\nMo
reover\, this interpretation can motivate a time-inhomogeneous\,\nasymptot
ic generalization of steady state analysis.\n
DTSTART;TZID=America/New_York:20201214T140000
DTEND;TZID=America/New_York:20201214T150000
LAST-MODIFIED:20201130T220533Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Members’ Seminar
URL:https://www.ias.edu/math/events/members-seminar-347
END:VEVENT
BEGIN:VEVENT
UID:7dd4c440-147c-4f52-a26a-58c84dd19cb9
DTSTAMP:20201203T104601Z
CREATED:20200925T221742Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Joaquim Serra\n\nAffiliatio
n: Eidgenössische Technische Hochschule Zürich\n\n
DTSTART;TZID=America/New_York:20201214T163000
DTEND;TZID=America/New_York:20201214T173000
LAST-MODIFIED:20201117T182336Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/math/events/analysis-seminar-130
END:VEVENT
BEGIN:VEVENT
UID:964f7ee2-ae9f-44ba-8a96-c6b81956251e
DTSTAMP:20201203T104601Z
CREATED:20201002T172517Z
DESCRIPTION:Topic: (Homotopy) limits and colimits\n\nSpeakers: Tony Feng\n
\nAffiliation: Member\, School of Mathematics\n\n
DTSTART;TZID=America/New_York:20201215T133000
DTEND;TZID=America/New_York:20201215T153000
LAST-MODIFIED:20201201T031838Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Working Group on Stratified Homotopy Theory
URL:https://www.ias.edu/events/working-group-stratified-homotopy-theory-9
END:VEVENT
BEGIN:VEVENT
UID:c96084d4-88ad-4ad0-a54d-39f74aa26890
DTSTAMP:20201203T104601Z
CREATED:20201109T192435Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Eric M. Friedlander\n\nAffi
liation: University of Southern California\; Member\, School of Mathematic
s\n\n
DTSTART;TZID=America/New_York:20201215T150000
DTEND;TZID=America/New_York:20201215T170000
LAST-MODIFIED:20201109T192450Z
LOCATION:Remote Access
SUMMARY:SL2 Seminar
URL:https://www.ias.edu/math/events/sl2-seminar-7
END:VEVENT
BEGIN:VEVENT
UID:585732bc-54f9-4bb9-adb2-a0fb8cfcdc3c
DTSTAMP:20201203T104601Z
CREATED:20200901T214718Z
DESCRIPTION:Topic: Hilbert-Schmidt stability of groups via C*-algebras\n\nS
peakers: Tatiana Shulman\n\nAffiliation: Polish Academy of Science\n\nThe
aim of this talk is to show that C*-algebras are useful for\nstudying stab
ility of groups. In particular we will discuss some\nobstructions for Hilb
ert-Schmidt stability of groups\, obtain a\ncomplete characterization of H
ilbert-Schmidt stability for amenable\ngroups in terms of characters\, and
discuss some examples of amenable\nand non-amenable Hilbert-Schmidt stabl
e groups. If time permits we\nalso will consider certain modifications of
Hilbert-Schmidt stability\nwhen matrices are replaced by elements of von N
eumann factors\, as well\nas a relation between Hilbert-Schmidt stability
and operator\nnorm-stability. All necessary information on C*-algebras wil
l be given\nduring the talk. The talk is mostly based on joint works with
Don\nHadwin.\n
DTSTART;TZID=America/New_York:20201216T110000
DTEND;TZID=America/New_York:20201216T121500
LAST-MODIFIED:20201125T150506Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:Stability and Testability
URL:https://www.ias.edu/events/stability-and-testability-8
END:VEVENT
BEGIN:VEVENT
UID:30497254-fdd3-4c90-8372-ddb87129b760
DTSTAMP:20201203T104601Z
CREATED:20201008T194309Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART;TZID=America/New_York:20201216T150000
DTEND;TZID=America/New_York:20201216T170000
LAST-MODIFIED:20201030T015046Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Geometric and Modular Representation Theory Seminar
URL:https://www.ias.edu/events/seminar-geometric-and-modular-representation
-theory-13
END:VEVENT
BEGIN:VEVENT
UID:d402ea43-bcae-4ed9-a124-64000809a076
DTSTAMP:20201203T104601Z
CREATED:20200806T232220Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Nike Sun\n\nAffiliation: Ma
ssachusetts Institute of Technology\n\n
DTSTART;TZID=America/New_York:20201216T173000
DTEND;TZID=America/New_York:20201216T190000
LAST-MODIFIED:20201030T233146Z
LOCATION:Remote Access
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/events/mathematical-conversations-204
END:VEVENT
BEGIN:VEVENT
UID:8b23af1f-5419-4217-92e6-5ef1340bd157
DTSTAMP:20201203T104601Z
CREATED:20201009T161603Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201217T100000
DTEND;TZID=America/New_York:20201217T120000
LAST-MODIFIED:20201015T175752Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Moonshine Seminar
URL:https://www.ias.edu/events/moonshine-seminar-10
END:VEVENT
BEGIN:VEVENT
UID:0164bb17-5472-495c-b360-89e6a514fb43
DTSTAMP:20201203T104601Z
CREATED:20200923T172421Z
DESCRIPTION:Topic: To Be Announced\n\n
DTSTART;TZID=America/New_York:20201217T163000
DTEND;TZID=America/New_York:20201217T173000
LAST-MODIFIED:20200923T172421Z
LOCATION:
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/events/joint-iasprinceton-university-number-theory-
seminar-244
END:VEVENT
BEGIN:VEVENT
UID:8c96d73c-52ec-4b76-8c62-f4415eae621c
DTSTAMP:20201203T104601Z
CREATED:20200110T165522Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20201218T180000
DTEND;TZID=America/New_York:20201218T180000
LAST-MODIFIED:20200110T165522Z
LOCATION:
SUMMARY:IAS School of Mathematics Term I Ends
URL:https://www.ias.edu/events/ias-school-mathematics-term-i-ends
END:VEVENT
BEGIN:VEVENT
UID:ce43d8c0-44c1-4f90-bb9d-de0ef36b646e
DTSTAMP:20201203T104601Z
CREATED:20200110T165737Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20210111T090000
DTEND;TZID=America/New_York:20210111T090000
LAST-MODIFIED:20200110T165737Z
LOCATION:
SUMMARY:IAS School of Mathematics Term II Begins
URL:https://www.ias.edu/events/ias-school-mathematics-term-ii-begins-0
END:VEVENT
BEGIN:VEVENT
UID:174f9c49-199d-4381-9f24-fe6a5c2cfbe0
DTSTAMP:20201203T104601Z
CREATED:20201102T125150Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Andrew Drucker\n\nAffiliation: Universi
ty of Chicago\n\n
DTSTART;TZID=America/New_York:20210125T111500
DTEND;TZID=America/New_York:20210125T121500
LAST-MODIFIED:20201105T151843Z
LOCATION:
SUMMARY:Computer Science and Discrete Mathematics Seminar I
URL:https://www.ias.edu/events/computer-science-and-discrete-mathematics-se
minar-i-26
END:VEVENT
BEGIN:VEVENT
UID:e49f6d2c-7c6e-4f68-bf87-a63f69b05ef7
DTSTAMP:20201203T104601Z
CREATED:20201105T141350Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Cynthia Vinzant\n\nAffiliation: Member\
, School of Mathematics\n\n
DTSTART;TZID=America/New_York:20210126T103000
DTEND;TZID=America/New_York:20210126T123000
LAST-MODIFIED:20201113T165359Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Computer Science and Discrete Mathematics Seminar II
URL:https://www.ias.edu/events/computer-science-and-discrete-mathematics-se
minar-ii-25
END:VEVENT
BEGIN:VEVENT
UID:aeb1d44d-6715-41b4-a154-9ad7e745b298
DTSTAMP:20201203T104601Z
CREATED:20201102T131735Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Annie Raymond\n\nAffiliation: Universit
y of Massachusetts Amherst\n\n
DTSTART;TZID=America/New_York:20210201T111500
DTEND;TZID=America/New_York:20210201T121500
LAST-MODIFIED:20201105T155530Z
LOCATION:
SUMMARY:Computer Science and Discrete Mathematics Seminar I
URL:https://www.ias.edu/events/computer-science-and-discrete-mathematics-se
minar-i-27
END:VEVENT
BEGIN:VEVENT
UID:4c5a7cb2-8fe2-4df4-93ab-b917819a6fad
DTSTAMP:20201203T104601Z
CREATED:20201105T141632Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Cynthia Vinzant\n\nAffiliation: Member\
, School of Mathematics\n\n
DTSTART;TZID=America/New_York:20210202T103000
DTEND;TZID=America/New_York:20210202T123000
LAST-MODIFIED:20201113T165311Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Computer Science and Discrete Mathematics Seminar II
URL:https://www.ias.edu/events/computer-science-and-discrete-mathematics-se
minar-ii-26
END:VEVENT
BEGIN:VEVENT
UID:4b9b5a2c-2e98-4d00-9de7-a120ceef7fa1
DTSTAMP:20201203T104601Z
CREATED:20200921T191517Z
DESCRIPTION:Topic: The History of the Arabic Book: A New Chapter\n\nIt is a
n exciting time to be thinking about Arabic book history\, as\nmany questi
ons are now being re-framed and addressed in ways that\nspeak to a wider f
ield of scholarly investigation. These questions\nconcern\, for example\,
the arguably scant material evidence for books\nup until roughly the eleve
nth century C.E.\, the non-survival of books\ntreating important topics\,
the great variability of witnesses to\nindividual works\, and the ways tha
t recycling of parts of prior books\noperated across time and place. Such
questions\, which query the very\nnature of ‘the book’\, are relevant for
the first four Islamic\ncenturies\, but also for later periods. This joint
ly delivered lecture\nwill present the KITAB project – a collaboration bet
ween historians\nand computer scientists that addresses these major questi
ons. We have\nassembled a corpus of 1.7 billion words of Arabic texts\, an
d are\nseeking specifically to understand transmission practices (ca.\n700
-1500)\, with a special focus on how authors recycled earlier works\nand h
ow they cited their predecessors. Through this lecture\, we hope\nto descr
ibe the frontiers of knowledge\, the challenges and promises of\nour data\
, and what listeners themselves might now do with it. \n\nSpeakers:\nMathe
w Barber (The Aga Khan University\, KITAB)\nLORENZ NIGST (The Aga Khan Uni
versity\, KITAB)\nSARAH BOWEN SAVANT (The Aga Khan University-ISMC)\nPETER
VERKINDEREN (The Aga Khan University\, KITAB)\n\n(KITAB is a European Res
earch Council Consolidator Grant project\nfunded under Horizon 2020 and al
so has received funding from the Qatar\nNational Library and the Andrew W.
Mellon Foundation.)\n\nRegister in advance for this webinar here\n[https:
//theias.zoom.us/webinar/register/WN_RSCOK4wzTG2jtkvcwn3LNQ].\nAfter regis
tering\, you will receive a confirmation email containing\ninformation abo
ut joining the webinar.\n
DTSTART;TZID=America/New_York:20210203T120000
DTEND;TZID=America/New_York:20210203T120000
LAST-MODIFIED:20201201T140145Z
LOCATION:Webinar
SUMMARY:Near Eastern Studies Lecture
URL:https://www.ias.edu/events/near-eastern-studies-lecture-0
END:VEVENT
BEGIN:VEVENT
UID:6bc34985-b906-4e8e-a30f-e6e935fb5816
DTSTAMP:20201203T104601Z
CREATED:20201102T134103Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Robert Kleinberg\n\nAffiliation: Cornel
l University\n\n
DTSTART;TZID=America/New_York:20210208T111500
DTEND;TZID=America/New_York:20210208T121500
LAST-MODIFIED:20201105T155739Z
LOCATION:
SUMMARY:Computer Science and Discrete Mathematics Seminar I
URL:https://www.ias.edu/events/computer-science-and-discrete-mathematics-se
minar-i-28
END:VEVENT
BEGIN:VEVENT
UID:146a6915-4a5c-4d82-a898-217954ebaec2
DTSTAMP:20201203T104601Z
CREATED:20200922T210340Z
DESCRIPTION:Speakers: Mercedes García-Arenal and Roberto Tottoli\n\nAffilia
tion: CSIC\, Madrid and University of Naples L'Orientale\n\nRegister in ad
vance for this webinar here\n[https://theias.zoom.us/webinar/register/WN_b
87bCUngQnK4ZPk0JZRLKw].\nAfter registering\, you will receive a confirmati
on email containing\ninformation about joining the webinar.\n
DTSTART;TZID=America/New_York:20210210T120000
DTEND;TZID=America/New_York:20210210T120000
LAST-MODIFIED:20200925T152615Z
LOCATION:
SUMMARY:Near Eastern Studies Lecture
URL:https://www.ias.edu/events/near-eastern-studies-lecture-3
END:VEVENT
BEGIN:VEVENT
UID:c7f1b17b-6a7e-4015-83ca-b66f3993e71a
DTSTAMP:20201203T104601Z
CREATED:20201111T155153Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Arkadev Chattopadhyay\n\nAffiliation: T
ata Institute of Fundamental Research\n\n
DTSTART;TZID=America/New_York:20210215T111500
DTEND;TZID=America/New_York:20210215T121500
LAST-MODIFIED:20201111T155512Z
LOCATION:
SUMMARY:Computer Science and Discrete Mathematics Seminar I
URL:https://www.ias.edu/events/computer-science-and-discrete-mathematics-se
minar-i-33
END:VEVENT
BEGIN:VEVENT
UID:3bf8ca69-97f9-4b81-a7ec-71634e1d1e1e
DTSTAMP:20201203T104601Z
CREATED:20201105T141054Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Zongchen Chen\n\nAffiliation: Georgia I
nstitute of Technology\n\n
DTSTART;TZID=America/New_York:20210222T111500
DTEND;TZID=America/New_York:20210222T121500
LAST-MODIFIED:20201117T142915Z
LOCATION:
SUMMARY:Computer Science and Discrete Mathematics Seminar I
URL:https://www.ias.edu/events/computer-science-and-discrete-mathematics-se
minar-i-32
END:VEVENT
BEGIN:VEVENT
UID:89909561-43be-4663-b6bb-30c9631c0dd1
DTSTAMP:20201203T104601Z
CREATED:20200921T191914Z
DESCRIPTION:Topic: Early Modern European Humanism and the Syriac New Testam
ent\n\nSpeakers: George A. Kiraz\n\nAffiliation: IAS School of Historical
Studies and Beth Mardutho: The Syriac Institute\n\nRegister in advance for
this webinar here\n[https://theias.zoom.us/webinar/register/WN_50TJQYdkSh
eqTzUaGaAi_Q].\nAfter registering\, you will receive a confirmation email
containing\ninformation about joining the webinar.\n
DTSTART;TZID=America/New_York:20210224T120000
DTEND;TZID=America/New_York:20210224T120000
LAST-MODIFIED:20200925T152729Z
LOCATION:
SUMMARY:Near Eastern Studies Lecture
URL:https://www.ias.edu/events/near-eastern-studies-lecture-1
END:VEVENT
BEGIN:VEVENT
UID:32285384-b52b-4240-ba14-8675044e7529
DTSTAMP:20201203T104601Z
CREATED:20201102T134602Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Benny Sudakov\n\nAffiliation: ETH Züri
ch\n\n
DTSTART;TZID=America/New_York:20210301T111500
DTEND;TZID=America/New_York:20210301T121500
LAST-MODIFIED:20201105T155839Z
LOCATION:
SUMMARY:Computer Science and Discrete Mathematics Seminar I
URL:https://www.ias.edu/events/computer-science-and-discrete-mathematics-se
minar-i-29
END:VEVENT
BEGIN:VEVENT
UID:d4abb94a-5480-42e4-bc70-9714f31d263c
DTSTAMP:20201203T104601Z
CREATED:20201102T201706Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Sylvia Serfaty\n\nAffiliation: New York
University\n\n
DTSTART;TZID=America/New_York:20210305T130000
DTEND;TZID=America/New_York:20210305T170000
LAST-MODIFIED:20201105T160144Z
LOCATION:
SUMMARY:Ruth and Irving Adler Expository Lecture in Mathematics
URL:https://www.ias.edu/events/ruth-and-irving-adler-expository-lecture-mat
hematics-3
END:VEVENT
BEGIN:VEVENT
UID:fd760450-f856-43fb-9a7a-3898d6b22beb
DTSTAMP:20201203T104601Z
CREATED:20201102T134915Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Venkatesan Guruswami\n\nAffiliation: Ca
rnegie Mellon University\n\n
DTSTART;TZID=America/New_York:20210308T111500
DTEND;TZID=America/New_York:20210308T121500
LAST-MODIFIED:20201105T155933Z
LOCATION:
SUMMARY:Computer Science and Discrete Mathematics Seminar I
URL:https://www.ias.edu/events/computer-science-and-discrete-mathematics-se
minar-i-30
END:VEVENT
BEGIN:VEVENT
UID:0262cd5b-b6eb-4ce2-a791-0dcfb9d2a438
DTSTAMP:20201203T104601Z
CREATED:20201028T183921Z
DESCRIPTION:Topic: An Egyptian Sheikh’s Literary World\n\n“An Egyptian Shei
kh’s Literary World” digitally reconstructs the\nlarge book collection of
Sheikh Mustafa Salamah al-Najjari (d.\n1286/1870)\, an important intellect
ual in late Ottoman Egypt. We use\nthe 480 print and manuscript titles and
valuations listed in his\ninheritance inventory as the foundation for our
data set. From there\,\nwe attempt to identify and track down these works
\, which we then\nconsult to enhance our data set via information that we
gather by\nhand. Our goal is to visualize bibliographic\, economic\, geogr
aphic\,\nand network data\, in order to analyze what we know — and have ye
t to\ndiscover — about this world of texts. This ongoing project is the\n
first empirical history of the coexistence of manuscript and print\ncultur
e in Cairo\, and we are just beginning to build our first\nvisualizations.
Our presentation will explore the stages of our work\,\nthe tensions betw
een scholarly detail and digital remediation that\nhave arisen at each of
these stages\, and what the current digital turn\nis allowing us to start
to ’see’ about Cairene textual culture\nduring this earlier watershed era.
\n\nSPEAKERS:\nADAM MESTYAN (Duke University)\nKATHRYN SCHWARZ (Universit
y of Massachusetts Amherst)\n\nREGISTER IN ADVANCE FOR THIS WEBINAR HERE\n
[https://theias.zoom.us/webinar/register/WN__Aw5bm-BRAqv3-QuUP9nag].\nAfte
r registering\, you will receive a confirmation email containing\ninformat
ion about joining the webinar.\n
DTSTART;TZID=America/New_York:20210317T120000
DTEND;TZID=America/New_York:20210317T133000
LAST-MODIFIED:20201201T140649Z
LOCATION:Webinar
SUMMARY:Near Eastern Studies and Digital Scholarship @IAS Joint Lecture
URL:https://www.ias.edu/hs/events/near-eastern-studies-and-digital-scholars
hip-ias-joint-lecture
END:VEVENT
BEGIN:VEVENT
UID:67ed32aa-8b68-414a-9fba-4082a30ef969
DTSTAMP:20201203T104601Z
CREATED:20200921T192409Z
DESCRIPTION:Topic: SICLE: Saadian Intellectual and Cultural Life\n\nSpeaker
s: François Déroche and Nuria de Castilla\n\nAffiliation: Collège de Franc
e and École Pratique des Hautes Études\, Paris\n\nRegister in advance for
this webinar here\n[https://theias.zoom.us/webinar/register/WN_M68Stl4oRIu
ifapcrCP69Q].\nAfter registering\, you will receive a confirmation email c
ontaining\ninformation about joining the webinar.\n
DTSTART;TZID=America/New_York:20210331T120000
DTEND;TZID=America/New_York:20210331T120000
LAST-MODIFIED:20200925T152819Z
LOCATION:
SUMMARY:Near Eastern Studies Lecture
URL:https://www.ias.edu/events/near-eastern-studies-lecture-2
END:VEVENT
BEGIN:VEVENT
UID:fde4fa98-cb39-4c0a-86d1-46d58a92b4ae
DTSTAMP:20201203T104601Z
CREATED:20200110T165817Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20210409T180000
DTEND;TZID=America/New_York:20210409T180000
LAST-MODIFIED:20200110T165817Z
LOCATION:
SUMMARY:IAS School of Mathematics Term II Ends
URL:https://www.ias.edu/events/ias-school-mathematics-term-ii-ends-0
END:VEVENT
BEGIN:VEVENT
UID:e44b0f01-d4e9-4f4e-a13d-2346ffb3165b
DTSTAMP:20201203T104601Z
CREATED:20200922T211239Z
DESCRIPTION:Topic: Bibliotheca arabica\n\nSPEAKERS:\nVERENA KLEMM (Institut
e of Arabic Studies\, University of Leipzig\,\nGermany)\nSTEFANIE BRINKMAN
N(Sächsische Akademie der Wissenschaften zu Leipzig)\nBORIS LIEBRENZ (Säch
sische Akademie der Wissenschaften zu Leipzig)\nTHOMAS EFER (Sächsische Ak
ademie der Wissenschaften zu Leipzig)\n\nRegister in advance for this webi
nar here\n[https://theias.zoom.us/webinar/register/WN_7TPbcHWTS-2oJr4LhD4O
Iw].\nAfter registering\, you will receive a confirmation email containing
\ninformation about joining the webinar.\n
DTSTART;TZID=America/New_York:20210414T120000
DTEND;TZID=America/New_York:20210414T133000
LAST-MODIFIED:20201201T141511Z
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:bcbe5297-1ccf-4e5b-b1fd-f3a5c007f510
DTSTAMP:20201203T104601Z
CREATED:20201123T163627Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Nike Sun\n\nAffiliation: Massachusetts
Institute of Technology\n\n
DTSTART;TZID=America/New_York:20210419T120000
DTEND;TZID=America/New_York:20210423T170000
LAST-MODIFIED:20201123T164509Z
LOCATION:
SUMMARY:Marston Morse Lectures
URL:https://www.ias.edu/events/marston-morse-lectures-88
END:VEVENT
BEGIN:VEVENT
UID:16760302-4b80-4bb2-aa4f-7347a06ba449
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20210907T121500
DTEND;TZID=America/New_York:20210907T140000
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:f169901a-c031-48ad-baa0-419aa6668bda
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20210914T121500
DTEND;TZID=America/New_York:20210914T140000
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:e13da017-4828-454f-bda3-42901fe22fa0
DTSTAMP:20201203T104601Z
CREATED:20200110T181253Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20210920T090000
DTEND;TZID=America/New_York:20210920T090000
LAST-MODIFIED:20200110T181253Z
LOCATION:
SUMMARY:IAS School of Mathematics Term I Begins
URL:https://www.ias.edu/events/ias-school-mathematics-term-i-begins-0
END:VEVENT
BEGIN:VEVENT
UID:3ed67bcb-911c-4d80-95a4-b9887a63e661
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20210921T121500
DTEND;TZID=America/New_York:20210921T140000
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:dcf575f1-96cd-4975-b723-b5d8b939c39f
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20210928T121500
DTEND;TZID=America/New_York:20210928T140000
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:a1e2d70c-5a55-4555-b01a-b1b7aabc6bd2
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20211005T121500
DTEND;TZID=America/New_York:20211005T140000
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:b12a1c66-1a62-474f-9c0d-d4dc2a73ac34
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20211012T121500
DTEND;TZID=America/New_York:20211012T140000
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:573955ba-b5b7-4fa6-aac0-7a929afa17e6
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20211019T121500
DTEND;TZID=America/New_York:20211019T140000
LAST-MODIFIED:20190726T150002Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/events/institute-advanced-study-princeton-universit
y-bahcall-lunch-129
END:VEVENT
BEGIN:VEVENT
UID:43a2f446-10fe-4bd3-8ef1-b92804c9c555
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20211026T121500
DTEND;TZID=America/New_York:20211026T140000
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:b3e40981-83d2-4dea-adad-595baa0e821b
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20211102T121500
DTEND;TZID=America/New_York:20211102T140000
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:59282e4a-9167-495c-ad61-089b0cafcfd0
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20211109T121500
DTEND;TZID=America/New_York:20211109T140000
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:f8536692-6529-4a19-9b32-09b18ea602fc
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20211116T121500
DTEND;TZID=America/New_York:20211116T140000
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:53d921d5-8105-4eaa-87d1-d00202c59d44
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20211123T121500
DTEND;TZID=America/New_York:20211123T140000
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:a35f3253-4abc-4ff2-9176-d2c6f75ae596
DTSTAMP:20201203T104601Z
CREATED:20190726T150002Z
DESCRIPTION:
DTSTART;TZID=America/New_York:20211130T121500
DTEND;TZID=America/New_York:20211130T140000
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
END:VCALENDAR