BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ca0b20f33713fd38fb8919aa30267bc2.ias.edu//NONSGML kigkonsult.se iCalcreator 2.41.90//
CALSCALE:GREGORIAN
UID:37366336-6563-4233-b933-396536643834
X-WR-TIMEZONE:UTC
X-WR-CALNAME:IAS Academic
BEGIN:VEVENT
UID:64386363-6239-4835-a232-393764323437
DTSTAMP:20240519T012344Z
CREATED:20240122T151011Z
DESCRIPTION:Topic: General Discussion
DTSTART:20240219T170000Z
DTEND:20240219T180000Z
LAST-MODIFIED:20240216T194338Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-104
END:VEVENT
BEGIN:VEVENT
UID:32323762-3937-4061-b131-643533353630
DTSTAMP:20240519T012344Z
CREATED:20240122T152129Z
DESCRIPTION:Topic: TBA\n\nThis week we join with SFIR: Star Formation/ISM R
endezvous. Note the\nspecial time and place.
DTSTART:20240219T190000Z
DTEND:20240219T200000Z
LAST-MODIFIED:20240216T203252Z
LOCATION:Zoom and Peyton Hall\,Dome Room
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-89
END:VEVENT
BEGIN:VEVENT
UID:65346264-3565-4661-b234-653834373830
DTSTAMP:20240519T012344Z
CREATED:20231208T184545Z
DESCRIPTION:Topic: Witt-Differential Operators\n\nSpeakers: Christopher Dod
d\n\nWe describe a new theory of sheaves of rings of differential operator
s\non the Witt-vectors on a smooth scheme characteristic p. Roughly\nspeak
ing\, these sheaves are to the de Rham-Witt complex as the usual\nsheaf of
differential operators is to the de Rham complex. Further\,\nthe module t
heory of these rings generalizes and extends the category\nof crystals\; w
e will explain how the associated formalism gives very\ngeneral comparison
theorems between crystalline cohomology of a\ncrystal and the the de Rham
-Witt cohomology with values in that\ncrystal.
DTSTART:20240219T203000Z
DTEND:20240219T213000Z
LAST-MODIFIED:20240214T135935Z
LOCATION:Simonyi Hall 101
SUMMARY:Joint IAS/Princeton Arithmetic Geometry Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-arithmetic-geometry-
seminar-9
END:VEVENT
BEGIN:VEVENT
UID:66383065-3334-4164-a337-313830306262
DTSTAMP:20240519T012344Z
CREATED:20240201T164856Z
DESCRIPTION:Topic: NEEKAAWA KIHTAACHIIMUWAK WULAAKWUNUWII (This Evening The
y Tell Stories)\n\nSpeakers: Ian McCallum\, Velma Noah Nicholas\, Kristin
Jacobs\, Molly Miller\, Ella Johnston\n\nTHIRD ANNUAL MUNSEE DELAWARE STOR
Y EVENING \n[https://www.ias.edu/sites/default/files/2024-Munsee-Story-Eve
ning-poster.pdf]\nNEEKAAWA KIHTAACHIIMUWAK WULAAKWUNUWII\n[https://www.ias
.edu/sites/default/files/2024-Munsee-Story-Evening-poster.pdf]\n(THIS EVEN
ING THEY TELL STORIES).\n\nmaawehleewak naxpii Ian McCallum wunjiiyayuw Na
lahii\; Velma Noah\nNicholas waak Kristin Jacobs wunjiiyayuwak Naahii\; wa
ak Maaliish\nMiller wunjiiyayuw Muh-he-conneok. neekaawa laachumohkawaatw
ak wunj\nLunaape waak shihsuwanakuw. Ian\, Velma\, Kristin\, waak Maaliish
\nlaachumohkawaatwak ambee aanihkwaachiimuwak alohke. Ella Johnston\nwunji
iyayuw Nalahii\; neeka akunootamun kteekhiikeew\nlaachumohkawaatwak. \n\nM
unsee-Delaware Nation community member Ian McCallum\; Eelunaapeewi\nLahkee
wiit members Velma Noah Nicholas and Kristin Jacobs\; and\nStockbridge-Mun
see Band of Mohicans member Molly Miller (Historical\nCommittee) share sto
ries from their communities in both the Munsee\n(Lunaape) and English lang
uages. Ian\, Velma\, Kristin\, and Molly\ndiscuss the background to the st
ories as well as the active and\nongoing interpretation and translation pr
ocess. Artist Ella Johnston\n(Munsee-Delaware Nation) shares the artistic
approach to illustrating\nthe stories.\n\nRegister to join the virtual gat
hering: HTTPS://BIT.LY/42NULPL\n[https://bit.ly/42nULPl]. After registerin
g\, you will receive an\nemail containing information about joining the ev
ent. Zoom hosting by\nthe School of Historical Studies\, Institute for Adv
anced Study\,\nPrinceton.\n\n
DTSTART:20240219T230000Z
DTEND:20240220T010000Z
LAST-MODIFIED:20240201T164856Z
LOCATION:Zoom event
SUMMARY:Third Annual Munsee Delaware Story Evening
URL:https://www.ias.edu/hs/events/third-annual-munsee-delaware-story-evenin
g
END:VEVENT
BEGIN:VEVENT
UID:31643464-3462-4832-b565-353161383536
DTSTAMP:20240519T012344Z
CREATED:20231212T163732Z
DESCRIPTION:Topic: Analyzing the Max Entropy Algorithm for TSP\n\nSpeakers:
Nathan Klein\n\nI will discuss recent progress on approximating the metri
c traveling\nsalesperson problem\, focusing on a line of work beginning in
2011 that\nstudies the behavior of the max entropy algorithm. This algori
thm is a\nrandomized variant of the beautiful Christofides-Serdyukov algor
ithm\nfrom the 1970s which adds a minimum cost matching to the odd vertice
s\nof a minimum cost spanning tree. \n\nAfter giving a survey of importan
t concepts and results\, I will sketch\na proof that the max entropy algor
ithm is a better-than-3/2\napproximation for metric TSP. This sketch will
particularly emphasize\nthe utility of viewing the max entropy distributio
n over spanning\ntrees as a polynomial with a zero-free region. I will als
o discuss\nrecent work on lower bounds and derandomization\, as well as hi
ghlight\nopen directions. We are still far from understanding the worst ca
se\nperformance of this algorithm.\n\nBased on joint works with Anna Karli
n\, Shayan Oveis Gharan\, Leonid\nGurvits\, Jonathan Leake\, Billy Jin\, a
nd David Williamson.
DTSTART:20240220T153000Z
DTEND:20240220T173000Z
LAST-MODIFIED:20240502T192724Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-556
END:VEVENT
BEGIN:VEVENT
UID:34366462-6163-4632-a333-386631636132
DTSTAMP:20240519T012344Z
CREATED:20240122T154240Z
DESCRIPTION:The Bahcall Lunch follows the astrophysics colloquium lecture.
DTSTART:20240220T173000Z
DTEND:20240220T183000Z
LAST-MODIFIED:20240122T154239Z
LOCATION:Lewis Library\, Princeton University
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-63
END:VEVENT
BEGIN:VEVENT
UID:34646133-6532-4430-b365-373035663163
DTSTAMP:20240519T012344Z
CREATED:20240122T161227Z
DESCRIPTION:Topic: Journal Club
DTSTART:20240220T190000Z
DTEND:20240220T200000Z
LAST-MODIFIED:20240216T194736Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Princeton University Computational Astrophysics Club
URL:https://www.ias.edu/sns/events/princeton-university-computational-astro
physics-club-27
END:VEVENT
BEGIN:VEVENT
UID:33386666-3162-4730-b032-613336343264
DTSTAMP:20240519T012344Z
CREATED:20240209T144610Z
DESCRIPTION:Topic: Crystals and $q$-Calculus\n\nSpeakers: Michel Gros\n\nI
will present two settings where $q$-De Rham and prismatic vector\nbundles
can be described in terms of modules over an appropriate ring\nof $q$-twis
ted differential operators and also the relation with\nformer results. \n
\nThis is a joint work with Adolfo Quirós and B. Le Stum.
DTSTART:20240221T190000Z
DTEND:20240221T200000Z
LAST-MODIFIED:20240506T121227Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Seminar
URL:https://www.ias.edu/math/events/special-year-seminar-15
END:VEVENT
BEGIN:VEVENT
UID:33323231-3433-4162-a263-376533363433
DTSTAMP:20240519T012344Z
CREATED:20240122T163452Z
DESCRIPTION:Topic: Asteroid Futures: How Love\, Fear\, and Greed will deter
mine our fate in Space\n\nSpeakers: Martin Elvis\n\nAsteroids are not just
potato-shaped lumps of rock. Instead they are\ndeeply involved in several
Big Questions that engage our love of\nknowledge - the origin and history
of the Solar System\, the origin of\nthe oceans\, the origin of life\, an
d the enabling of technological\ncivilization. But they are also objects o
f fear. An asteroid killed\n(most of) the dinosaurs\; eventually another w
ill hit Earth and might\nwipe us out. And lastly\, how real is the prospec
t of asteroid mining\,\na topic that has been talked about in breathless t
erms with trillions\nof dollars in resources claimed in a single asteroid.
This talk will\ninject numbers into all these questions and explain each
of them.\nWhether love\, fear\, or greed is dominant is up to you.
DTSTART:20240221T210000Z
DTEND:20240221T221500Z
LAST-MODIFIED:20240122T163451Z
LOCATION:Virtual Meeting
SUMMARY:Princeton Plasma Physics Laboratory (PPPL) Colloquium
URL:https://www.ias.edu/sns/events/princeton-plasma-physics-laboratory-pppl
-colloquium-12
END:VEVENT
BEGIN:VEVENT
UID:64663366-3834-4030-a664-303762396136
DTSTAMP:20240519T012344Z
CREATED:20240126T150857Z
DESCRIPTION:Topic: Banach-Colmez Spaces\n\nSpeakers: Bogdan Zavyalov
DTSTART:20240222T150000Z
DTEND:20240222T170000Z
LAST-MODIFIED:20240506T121200Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Learning Seminar
URL:https://www.ias.edu/math/events/special-year-learning-seminar-25
END:VEVENT
BEGIN:VEVENT
UID:66346535-3366-4161-a334-643236323561
DTSTAMP:20240519T012344Z
CREATED:20240122T164446Z
DESCRIPTION:Topic: Pulsar magnetospheres and their radiation\n\nSpeakers: S
asha Phillipov\n\nIn this talk\, I will review recent progress in understa
nding the\ncomplex multi-scale plasma physics of neutron star magnetospher
es\nthrough the lens of first-principles particle-in-cell simulations. I\n
will highlight pair production discharges near the stellar surface and\nra
diative magnetic reconnection near and beyond the light cylinder. I\nwill
extensively discuss their role in powering the multi-wavelength\nnon-therm
al radiation of pulsars\, which spans almost 20 decades in\nphoton energy\
, from enigmatic coherent radio waves to recently\ndetected 20TeV emission
in Vela.
DTSTART:20240222T160000Z
DTEND:20240222T170000Z
LAST-MODIFIED:20240220T133138Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-89
END:VEVENT
BEGIN:VEVENT
UID:37653732-3539-4932-a263-636135613839
DTSTAMP:20240519T012344Z
CREATED:20240207T190441Z
DESCRIPTION:Topic: What are Anosov Representations?\n\nSpeakers: Fanny Kass
el
DTSTART:20240222T180000Z
DTEND:20240222T190000Z
LAST-MODIFIED:20240403T153828Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-21
END:VEVENT
BEGIN:VEVENT
UID:37636233-3066-4831-b730-316565383633
DTSTAMP:20240519T012344Z
CREATED:20240216T200541Z
DESCRIPTION:Topic: Galaxies in the Making: Recent Advances in Understanding
the Star Formation Histories of Galaxies\n\nSpeakers: Kartheik Iyer\n\nSt
ar formation histories (SFHs) encode the rich and complex evolution\nof ga
laxies over cosmic time. In recent years\, we have made\nsignificant progr
ess in understanding SFHs\, thanks to a combination of\nnew observational
data\, theoretical insights\, and advances in machine\nlearning. In this t
alk\, I will focus on: (i) how we infer SFH\ninformation from observations
\, for both individual objects and\nensembles of galaxies\, (ii) how we ca
n use cosmological simulations to\nunderstand the connections between star
formation and the underlying\nphysical processes by studying variability
(or 'burstiness') on\ndifferent timescales\, and (iii) the role of novel m
ethods at the\nintersection of astrostatistics and machine learning to tac
kle\nchallenges posed by large datasets from current and upcoming\nobserva
tories. I will conclude with a zoomed out view of the landscape\nof galaxy
evolution research enabled by JWST\, and the many things to\nlook forward
to with Rubin\, Roman\, and Euclid in the years ahead\nRecommended Readin
g:\nIyer & Speagle et al. 2024\nhttps://ui.adsabs.harvard.edu/abs/2024ApJ.
..961...53I/abstract\n[https://ui.adsabs.harvard.edu/abs/2024ApJ...961...5
3I/abstract]\nIyer et al. 2020\nhttps://ui.adsabs.harvard.edu/abs/2020MNRA
S.498..430I/abstract\n[https://ui.adsabs.harvard.edu/abs/2020MNRAS.498..43
0I/abstract]\nIyer et al. 2019\nhttps://ui.adsabs.harvard.edu/abs/2019ApJ.
..879..116I/abstract\n[https://ui.adsabs.harvard.edu/abs/2019ApJ...879..11
6I/abstract]
DTSTART:20240222T203000Z
DTEND:20240222T213000Z
LAST-MODIFIED:20240216T200540Z
LOCATION:Serin Hall Rm W330\, Rutgers and Zoom
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
36
END:VEVENT
BEGIN:VEVENT
UID:63363333-3934-4236-a132-393337373237
DTSTAMP:20240519T012344Z
CREATED:20231204T165216Z
DESCRIPTION:Topic: On Eisenstein’s Jugendtraum for Complex Cubic Fields \n
\nSpeakers: Pierre Charollois\n\nIn the early 2000’s Ruijsenaars and Felde
r-Varchenko\nhave introduced the elliptic gamma function\, a\nremarkable m
ultivariable meromorphic q-series that comes from\nmathematical physics. I
t satisfies modular functional equations under\nthe group SL3(Z) which mak
e it a higher dimensional analogue of the\nJacobi theta function. In this
work\, we unveil the place that this\nfunction and its avatars play in num
ber theory. Our main thesis is\nthat these functions play the role of modu
lar units in extending the\ntheory of complex multiplication to complex cu
bic fields. In other\nwords we propose a conjectural solution to Hilbert’s
12th problem\nfor complex cubic fields\, following a line of research act
ually\ninitiated G. Eisenstein. We give a lot of numerical evidences that
\nsupport this conjecture\, and relate it to the Stark conjecture by\nprov
ing an analogue of the Kronecker limit formula in this cubic\nsetting. Th
is is joint work with Nicolas Bergeron and Luis Garcia.\n\nThis talk is de
dicated to the memory of Nicolas Bergeron.
DTSTART:20240222T213000Z
DTEND:20240222T223000Z
LAST-MODIFIED:20240223T125113Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-13
END:VEVENT
BEGIN:VEVENT
UID:30633532-3666-4334-b535-366131343130
DTSTAMP:20240519T012344Z
CREATED:20240112T151800Z
DESCRIPTION:Topic: Floer-Theoretic Corrections to the Geometry of Moduli Sp
aces of Lagrangian Tori\n\nSpeakers: Denis Auroux\n\nGiven a Lagrangian to
rus fibration on the complement of an\nanticanonical divisor in a Kahler m
anifold\, one usually constructs a\nmirror space by gluing local charts (m
oduli spaces of objects of the\nFukaya category supported on generic torus
fibers) via wall-crossing\ntransformations determined by counts of Maslov
index 0 holomorphic\ndiscs\; this mirror also comes equipped with a regul
ar function (the\nsuperpotential) which enumerates Maslov index 2 holomorp
hic discs.\nHolomorphic discs of negative Maslov index deform this picture
by\nintroducing inconsistencies in the wall-crossing transformations\; th
e\ngeometric features of the corrected moduli space of objects of the\nFuk
aya category can be understood in the language of extended\ndeformations o
f Landau-Ginzburg models. We will illustrate this\nphenomenon on an explic
it example (a 4-fold obtained by blowing up a\ntoric variety)\, and\, if t
ime permits\, discuss a family Floer approach\nto the geometry of the corr
ected mirror in this setting.
DTSTART:20240223T141500Z
DTEND:20240223T154500Z
LAST-MODIFIED:20240223T125833Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-141
END:VEVENT
BEGIN:VEVENT
UID:30353331-3532-4066-a663-636262383065
DTSTAMP:20240519T012344Z
CREATED:20240122T171004Z
DESCRIPTION:Topic: Metastability of magnetohydrodynamic equilibria and thei
r relaxation\n\nSpeakers: David Hosking\n\nMotivated by explosive releases
of energy in fusion\, space and\nastrophysical plasmas\, this talk consid
ers the nonlinear stability of\nstratified magnetohydrodynamic (MHD) equil
ibria in 2D. I demonstrate\nthat\, unlike the Schwarzschild criterion in h
ydrodynamics (“entropy\nmust increase upwards for stability”)\, the modifi
ed Schwarzschild\ncriterion for 2D MHD (or any kind of fluid dynamics with
more than one\nsource of pressure) is a guarantee only of linear stabilit
y. As a\nresult\, in 2D MHD (unlike HD) there exist metastable equilibria
that\nare unstable to nonlinear perturbations despite being stable to line
ar\nones. I show that the available energy of these equilibria under\nnon-
diffusive reorganization of flux tubes can be calculated by\nsolving a com
binatorial optimization problem. The reorganized states\nwith minimum ener
gy are\, to good approximation\, the final states\nreached by simulations
of destabilized equilibria at small Reynolds\nnumber. To predict the state
reached by turbulent relaxation at large\nReynolds number\, I construct a
statistical mechanical theory based on\nthe maximization of Boltzmann’s m
ixing entropy (this is analogous\nto the Lynden-Bell statistical mechanics
of stellar systems and\ncollisonless plasmas and the Robert-Sommeria-Mill
er theory of 2D\nvortices). I show that the predictions of this statistica
l mechanics\nare in remarkable agreement with numerical simulations.\n----
DTSTART:20240223T173000Z
DTEND:20240223T183000Z
LAST-MODIFIED:20240220T134718Z
LOCATION:Dome Room\, Peyton Hall or Zoom
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-64
END:VEVENT
BEGIN:VEVENT
UID:38383564-3234-4139-a463-626666376130
DTSTAMP:20240519T012344Z
CREATED:20231207T142801Z
DESCRIPTION:Topic: Chaos in Lattice Spin Glasses and Some Questions for Ana
lysts\n\nSpeakers: Sourav Chatterjee\n\nIn spite of tremendous progress in
the mean-field theory of spin\nglasses in the last forty years\, culminat
ing in Giorgio Parisi’s\nNobel Prize in 2021\, the more “realistic” short-
range spin glass\nmodels have remained almost completely intractable. In t
his talk\, I\nwill show that the ground states of short-range spin glasses
are\nchaotic with respect to small perturbations of the disorder\, settli
ng\na conjecture made by Daniel Fisher and David Huse in 1986. The proof\n
proceeds by converting the physics problem into a problem in analysis.\nMo
st of the major questions in the field\, however\, remain open. I will\nou
tline a general plan for converting these questions to problems in\nanalys
is\, and pose them to the analysts in the audience.
DTSTART:20240223T193000Z
DTEND:20240223T203000Z
LAST-MODIFIED:20240305T132515Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Analysis and Mathematical Physics
URL:https://www.ias.edu/math/events/analysis-and-mathematical-physics-24
END:VEVENT
BEGIN:VEVENT
UID:65356263-6332-4565-a438-356534663130
DTSTAMP:20240519T012344Z
CREATED:20240201T140647Z
DESCRIPTION:Topic: Animated Analytic Rings\n\nSpeakers: Guido Bosco\n\nReca
ll the notion of condensed analytic ring\, then introduce its\nanimated va
riant and discuss its properties. Explain the construction\nof induced ana
lytic structures on animated condensed rings. Introduce\nthe notion of ste
ady maps of analytic rings and discuss its properties\nand some examples.
For a discrete Huber pair $(A\,A^+)$\, explain the\nconstruction of the an
alytic ring $(A\,A^+)_\blacksquare$.
DTSTART:20240223T193000Z
DTEND:20240223T213000Z
LAST-MODIFIED:20240201T140646Z
LOCATION:Princeton University\, Fine Hall 314
SUMMARY:Condensed Learning Seminar
URL:https://www.ias.edu/math/events/condensed-learning-seminar-14
END:VEVENT
BEGIN:VEVENT
UID:39363662-3330-4636-b865-363561343533
DTSTAMP:20240519T012344Z
CREATED:20240126T151434Z
DESCRIPTION:Topic: Vector Bundles on the Fargues-Fontaine Curve II\n\nSpeak
ers: Kalyani Kansal
DTSTART:20240226T140000Z
DTEND:20240226T154500Z
LAST-MODIFIED:20240506T121129Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Learning Seminar
URL:https://www.ias.edu/math/events/special-year-learning-seminar-27
END:VEVENT
BEGIN:VEVENT
UID:31663864-3932-4931-b966-333566663133
DTSTAMP:20240519T012344Z
CREATED:20231212T162510Z
DESCRIPTION:Topic: Stability and Learning in Strategic Games\n\nSpeakers: É
va Tardos\n\nOver the last two decades we have developed good understandin
g how to\nquantify the impact of strategic user behavior on outcomes in ma
ny\ngames (including traffic routing and online auctions) and showed that
\nthe resulting bounds extend to repeated games assuming players use a\nfo
rm of learning (no-regret learning) to adapt to the environment. We\nwill
review how this area evolved since its early days\, and also\ndiscuss some
of the new frontiers\, including when repeated\ninteractions have carry-o
ver effects between rounds: when outcomes in\none round effect the game in
the future\, as is the case in many\napplications. \n\nIn this talk\, we
study this phenomenon in the context of a game\nmodeling queuing systems:
routers compete for servers\, where packets\nthat do not get served need t
o be resent\, resulting in a system where\nthe number of packets at each r
ound depends on the success of the\nrouters in the previous rounds. In joi
nt work with Jason Gaitonde\, we\nanalyze the resulting highly dependent r
andom processes\, and show\nbounds on the resulting budgeted welfare for a
uctions and the excess\nserver capacity needed to guarantee that all packe
ts get served in the\nqueuing system despite the selfish (myopic) behavior
of the\nparticipants. We will briefly mention work with Giannis Fikioris
in a\ndifferent game\, repeated auction with budgets\, where the same issu
e\narises also.
DTSTART:20240226T160000Z
DTEND:20240226T170000Z
LAST-MODIFIED:20240502T192646Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-563
END:VEVENT
BEGIN:VEVENT
UID:38336361-6466-4764-b830-366365303739
DTSTAMP:20240519T012344Z
CREATED:20240122T151028Z
DESCRIPTION:Topic: General Discussion
DTSTART:20240226T170000Z
DTEND:20240226T180000Z
LAST-MODIFIED:20240223T151554Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-105
END:VEVENT
BEGIN:VEVENT
UID:32656237-3032-4832-b661-333535333636
DTSTAMP:20240519T012344Z
CREATED:20240112T154706Z
DESCRIPTION:Topic: Hofer-Wysocki-Zehnder's Conjecture on Two or Infinitely
Many Orbits\n\nSpeakers: Daniel Cristofaro-Gardiner\n\nIn their 2001 paper
\, Hofer\, Wysocki and Zehnder conjectured that every\nautonomous Hamilton
ian flow has either two or infinitely many simple\nperiodic orbits on any
compact star-shaped energy level\; in the same\npaper\, the authors prove
this assuming in addition that the flow is\nnondegenerate and the stable a
nd unstable manifolds of all hyperbolic\norbits intersect transversally\,
a condition which holds generically. I\nwill explain recent joint work res
olving this conjecture. Our results\nalso apply to show that every Finsler
metric on the two-sphere has\neither two or infinitely many prime closed
geodesics\, answering a\nquestion attributed to Alvarez Paiva\, Bangert an
d Long.
DTSTART:20240226T173000Z
DTEND:20240226T184500Z
LAST-MODIFIED:20240226T193242Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Symplectic Geometry Seminar
URL:https://www.ias.edu/math/events/symplectic-geometry-seminar-12
END:VEVENT
BEGIN:VEVENT
UID:66633835-3362-4666-b733-663166653839
DTSTAMP:20240519T012344Z
CREATED:20240223T152242Z
DESCRIPTION:Topic: Cosmology from weak lensing three-point correlation func
tion\n\nSpeakers: Sunao Sugiyama\n\nWeak lensing is a powerful tool to ext
ract information from\nlarge-scale structures to study the nature of dark
matter and dark\nenergy. Two-point correlation function (2PCF) of weak len
sing is one\nof the simplest summary statistics but can extract all the in
formation\nonly if the density fluctuation is Gaussian as in the early uni
verse.\nThe field in the late-time universe is however non-Gaussian due to
the\nnonlinear evolution and additional/independent information is expect
ed\nto be obtained by analyzing the weak-lensing higher-order statistics.
\nIn this talk\, I present our recent work on the weak lensing\nthree-poin
t correlation function (3PCF). Compared to the case of 2PCF\,\nthe numeric
al cost is the most challenging part of every step of the\n3PCF analysis\,
which prevented the 3PCF analysis in the past/ongoing\nsurveys. We develo
ped a new method to solve this numerical difficulty\nbased on the multipol
e expansion of 3PCF\, which can calculate the 3PCF\n2 orders of magnitude
faster.
DTSTART:20240226T173000Z
DTEND:20240226T190000Z
LAST-MODIFIED:20240223T152242Z
LOCATION:IAS\, West Seminar Room
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-72
END:VEVENT
BEGIN:VEVENT
UID:62616361-6666-4633-b635-393732306430
DTSTAMP:20240519T012344Z
CREATED:20240223T151422Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Sanghyuk Moon\n\nThis week we join with
SFIR: Star Formation/ISM Rendezvous. Note the\nspecial time and place.
DTSTART:20240226T190000Z
DTEND:20240226T200000Z
LAST-MODIFIED:20240223T151422Z
LOCATION:Zoom and Peyton Hall\,Dome Room
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-104
END:VEVENT
BEGIN:VEVENT
UID:39613530-6530-4162-b432-656362373738
DTSTAMP:20240519T012344Z
CREATED:20240125T162232Z
DESCRIPTION:Topic: Minimal Surfaces and the Isoperimetric Inequality\n\nSpe
akers: Simon Brendle\n\nThe isoperimetric inequality has a long history in
the geometry. In\nthis lecture\, we will discuss how the isoperimetric in
equality can be\ngeneralized to submanifolds in Euclidean space. As a spec
ial case\, we\nobtain a sharp isoperimetric inequality for minimal submani
folds of\ncodimension at most 2\, thereby answering a question going back
to work\nof Carleman. The proof of that inequality is inspired by\, but do
es not\nactually use\, optimal transport.
DTSTART:20240226T190000Z
DTEND:20240226T200000Z
LAST-MODIFIED:20240226T193405Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Marston Morse Lectures
URL:https://www.ias.edu/math/events/marston-morse-lectures-106
END:VEVENT
BEGIN:VEVENT
UID:38333266-3135-4238-b537-653032386463
DTSTAMP:20240519T012344Z
CREATED:20231206T182136Z
DESCRIPTION:Topic: Prismatization and the Image of the J-homomorphism\n\nSp
eakers: Arpon Raksit\n\nFor p a prime number\, Bhatt–Lurie and Drinfeld de
fined the\nprismatization of a p-complete commutative ring R. I will overv
iew a\ndifferent perspective on prismatization\, using homotopy theory and
in\nparticular topological Hochschild homology. This perspective enlarges
\nthe scope of the definition: namely\, we may consider the\nprismatizatio
n of any cyclotomic E-infinity ring A\; for sufficiently\nnice p-complete
commutative rings R\, we recover the previously known\nobject by consideri
ng the case A = THH(R). I will then discuss a\ndescription of the cyclotom
ic E-infinity ring THH(Z_p) for odd primes\np in terms of a classical obje
ct of homotopy theory\, the image of the\nJ-homomorphism\, and (via the af
orementioned generalization of\nprismatization) the relation between this
description and Lurie's\ntheory of the prismatization of the field with on
e element. \n\nThis is all joint work\, partially with Devalapurkar and pa
rtially with\nDevalapurkar\, Hahn\, and Yuan.
DTSTART:20240226T203000Z
DTEND:20240226T213000Z
LAST-MODIFIED:20240226T143248Z
LOCATION:Fine 322\, Princeton University
SUMMARY:Joint IAS/Princeton Arithmetic Geometry Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-arithmetic-geometry-
seminar-16
END:VEVENT
BEGIN:VEVENT
UID:65376236-3462-4633-a661-333666333564
DTSTAMP:20240519T012344Z
CREATED:20240209T144226Z
DESCRIPTION:Topic: Computing Greatest Common Divisors of Polynomials in Par
allel\n\nSpeakers: Robert Andrews\n\nGiven two univariate polynomials\, ho
w does one compute their greatest\ncommon divisor (GCD)? This problem can
be solved in polynomial time\nusing the Euclidean algorithm\, and even in
quasi-linear time using a\nfast variant of the Euclidean algorithm. The GC
D can also be expressed\nin a linear-algebraic form. Basic tasks in linear
algebra like\ncomputing determinants and solving linear systems can be pe
rformed in\n$O(\log^2 n)$ parallel time\, and this can be used to compute
the GCD\nin $O(\log^2 n)$ parallel time. This algorithm does not take adva
ntage\nof any structure present in the resulting linear systems\, so in\np
rinciple one could compute the GCD even faster.\n\nIn this talk\, I will d
escribe a new algorithm that computes the GCD in\n$O(\log n)$ parallel tim
e by using a combination of polynomial\ninterpolation and Newton's identit
ies for symmetric polynomials.\nSimilar ideas yield $O(\log n)$ parallel t
ime algorithms to compute\nthe resultant\, Bézout coefficients\, and squar
efree decomposition.\n\nBased on joint work with Avi Wigderson.
DTSTART:20240227T153000Z
DTEND:20240227T173000Z
LAST-MODIFIED:20240502T192608Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-562
END:VEVENT
BEGIN:VEVENT
UID:64653836-3032-4363-b234-306131636330
DTSTAMP:20240519T012344Z
CREATED:20240122T154257Z
DESCRIPTION:The Bahcall Lunch follows the astrophysics colloquium lecture.
DTSTART:20240227T173000Z
DTEND:20240227T183000Z
LAST-MODIFIED:20240122T154256Z
LOCATION:Lewis Library\, Princeton University
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-64
END:VEVENT
BEGIN:VEVENT
UID:66616434-3237-4464-b430-633330313434
DTSTAMP:20240519T012344Z
CREATED:20240122T161252Z
DESCRIPTION:Topic: Journal Club
DTSTART:20240227T190000Z
DTEND:20240227T200000Z
LAST-MODIFIED:20240223T152731Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Princeton University Computational Astrophysics Club
URL:https://www.ias.edu/sns/events/princeton-university-computational-astro
physics-club-28
END:VEVENT
BEGIN:VEVENT
UID:38363630-6366-4838-b963-326433313763
DTSTAMP:20240519T012344Z
CREATED:20240125T164438Z
DESCRIPTION:Topic: Singularity Models in 3D Ricci Flow\n\nSpeakers: Simon B
rendle\n\nThe Ricci flow is a natural evolution equation for Riemannian me
trics\non a given manifold. From the point of view of PDE\, the Ricci flow
is\na system of linear parabolic equations\, which can be viewed as the\n
heat equation analogue of the Einstein equations in general\nrelativity. T
he central problem is to understand singularity\nformation. In other words
\, what does the geometry look like at points\nwhere the curvature is larg
e? In his spectacular 2002 breakthrough\,\nPerelman achieved a qualitative
understanding of singularity formation\nin dimension 3\; this is sufficie
nt for topological conclusions. In\nthis lecture\, we will discuss more re
cent developments which have led\nto a complete classification of singular
ity models in dimension 3.
DTSTART:20240228T190000Z
DTEND:20240228T200000Z
LAST-MODIFIED:20240228T140758Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Marston Morse Lectures
URL:https://www.ias.edu/math/events/marston-morse-lectures-107
END:VEVENT
BEGIN:VEVENT
UID:30326630-6238-4362-b861-343031386335
DTSTAMP:20240519T012344Z
CREATED:20240109T145911Z
DESCRIPTION:Topic: D-modules on the Fargues-Fontaine Curve\n\nSpeakers: Gui
do Bosco\n\nMotivated by the desire to express in terms of de Rham data th
e\npro-étale cohomology with non-trivial $\mathbb{Q}_p$-coefficients of\nr
igid spaces $X$\, defined over $\mathbb{Q}_p$ or $\mathbb{C}_p$\, I\nwill
explain how to define D-modules on the relative Fargues-Fontaine\ncurve at
tached to $X$\, and why it is interesting to consider such\nobjects. Then\
, I will outline how the cohomology of such D-modules\ngeneralizes to coef
ficients the Hyodo-Kato cohomology for rigid spaces\ndefined by Colmez-Niz
ioł.\n\nThis is based on joint work in progress with Johannes Anschütz\,\n
Arthur-César Le Bras\, and Juan Esteban Rodriguez Camargo.
DTSTART:20240228T203000Z
DTEND:20240228T213000Z
LAST-MODIFIED:20240506T121100Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Seminar
URL:https://www.ias.edu/math/events/special-year-seminar-11
END:VEVENT
BEGIN:VEVENT
UID:35663038-3131-4433-a532-333037333664
DTSTAMP:20240519T012344Z
CREATED:20240112T153717Z
DESCRIPTION:Topic: Permanent versus Determinant\n\nSpeakers: Robert Andrews
\n\nThe permanent and determinant are polynomial functions of the entries
\nof a matrix\, differing only in the signs of their monomials. Despite\nt
heir apparent similarity\, these polynomials play very different roles\nin
mathematics and computer science: the determinant appears\nthroughout alg
ebra and geometry\, while the natural habitat of the\npermanent is closer
to combinatorics. Are these polynomials truly\ndifferent\, or is there a s
imple way of expressing one in terms of the\nother? I will survey some of
what is known about this problem and\nexplain its role as an algebraic ver
sion of the P versus NP question.
DTSTART:20240228T230000Z
DTEND:20240229T010000Z
LAST-MODIFIED:20240221T201002Z
LOCATION:Birch Garden\, Simons Hall
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-271
END:VEVENT
BEGIN:VEVENT
UID:65356332-6563-4562-b266-633337343764
DTSTAMP:20240519T012344Z
CREATED:20240126T151256Z
DESCRIPTION:Topic: The Topological Space |Bun$_G$|\n\nSpeakers: Zeyu Liu
DTSTART:20240229T150000Z
DTEND:20240229T170000Z
LAST-MODIFIED:20240506T121031Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Learning Seminar
URL:https://www.ias.edu/math/events/special-year-learning-seminar-26
END:VEVENT
BEGIN:VEVENT
UID:66623132-3635-4339-a264-386333303933
DTSTAMP:20240519T012344Z
CREATED:20240122T164519Z
DESCRIPTION:Topic: New Insights into Strong Gravity from Accreting Black Ho
les\n\nSpeakers: Prashant Kocherlakota\n\nRecent horizon-scale images of M
essier 87* and Sagittarius A* have\nbeen used to demonstrate that their sp
acetimes are well-described by\nthe Kerr metric. The latter is a solution
to the vacuum Einstein\nequations of general relativity\, and is used to d
escribe spinning\nblack holes. While of fundamental importance\, it has un
desirable\nfeatures such as a spacetime singularity or a Cauchy horizon. T
o find\nphenomenological resolutions of such features\, using observations
\,\nstudies of astrophysical processes in non-Kerr spacetimes have\nrecent
ly gained prominence. We will begin by briefly reviewing the\ncurrent stat
us of observational constraints on such alternatives. We\nwill then demons
trate how future observations of the 'photon ring' can\ngrant access to ne
w observables that will refine our physical\nunderstanding of strong-gravi
ty. We will end by showing\, using\nstate-of-the-art numerical simulations
\, that the energetics of\nrelativistic outflows (jets) is universally des
cribed by a simple\nelectromagnetic Penrose process (the Blandford-Znajek
mechanism).
DTSTART:20240229T160000Z
DTEND:20240229T170000Z
LAST-MODIFIED:20240223T153433Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-90
END:VEVENT
BEGIN:VEVENT
UID:37373738-3037-4434-b534-336563376664
DTSTAMP:20240519T012344Z
CREATED:20240206T131529Z
DESCRIPTION:Topic: What is an Integrable System?\n\nSpeakers: Karen Uhlenbe
ck
DTSTART:20240229T180000Z
DTEND:20240229T190000Z
LAST-MODIFIED:20240223T132312Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-20
END:VEVENT
BEGIN:VEVENT
UID:63383865-3539-4234-b561-643232303731
DTSTAMP:20240519T012344Z
CREATED:20231204T165905Z
DESCRIPTION:Topic: Hecke Algebras for P-Adic Groups and Explicit Local Lang
lands Correspondence\n\nSpeakers: Yujie Xu\n\nI will talk about several re
sults on Hecke algebras attached to\nBernstein blocks of (arbitrary) reduc
tive p-adic groups\, where we\nconstruct a local Langlands correspondence
for these Bernstein blocks.\nOur techniques draw inspirations from the fou
ndational works of\nDeligne\, Kazhdan\, Lusztig etc.\n\nAs an application\
, we prove the (classical) Local Langlands Conjecture\nfor G_2\, which is
the first known case in literature of (classical)\nLLC for exceptional gro
ups. Our correspondence satisfies an expected\nproperty on cuspidal suppor
t\, which is compatible with the generalized\nSpringer correspondence\, al
ong with a list of characterizing\nproperties including the stabilization
of character sums\, formal\ndegree property etc. In particular\, we obtain
(not necessarily\nunipotent) 'mixed' L-packets containing 'F-singular' su
percuspidals\nand non-supercuspidals. Such 'mixed' L-packets had been elus
ive up\nuntil this point and very little was known prior to our work. I wi
ll\ngive explicit examples of such mixed L-packets in terms of\nDeligne-Lu
sztig theory and Kazhdan-Lusztig parametrization.\n\nIf time permits\, I w
ill explain how to pin down certain choices in the\nconstruction of the co
rrespondence using stability of L-packets\; one\nkey input is a homogeneit
y result due to Waldspurger and DeBacker.\nMoreover\, I will mention how t
o adapt our general strategy to\nconstruct explicit LLC for other reductiv
e groups\, such as GSp(4)\,\nSp(4)\, etc. Such explicit description of the
L-packets has been useful\nin number-theoretic applications\, e.g. modula
rity lifting questions.\n\nVarious parts of this talk are based on joint w
orks with various\ncollaborators\, and attributions will be made clear thr
oughout the\ntalk.
DTSTART:20240229T213000Z
DTEND:20240229T223000Z
LAST-MODIFIED:20240228T203916Z
LOCATION:*Princeton University\, Fine 214*
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-20
END:VEVENT
BEGIN:VEVENT
UID:32656666-3739-4533-a131-346231656233
DTSTAMP:20240519T012344Z
CREATED:20240223T160430Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Nick Loudas
DTSTART:20240301T173000Z
DTEND:20240301T183000Z
LAST-MODIFIED:20240223T160430Z
LOCATION:Dome Room\, Peyton Hall or Zoom
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-66
END:VEVENT
BEGIN:VEVENT
UID:31306236-6136-4633-b963-356237343138
DTSTAMP:20240519T012344Z
CREATED:20240125T164526Z
DESCRIPTION:Topic: Scalar Curvature Rigidity of Polytopes\n\nSpeakers: Simo
n Brendle\n\nA central theme in differential geometry involves studying Ri
emannian\nmetrics satisfying various curvature positivity conditions. The
\nweakest condition one can impose is the positivity of the scalar\ncurvat
ure. Inspired by Toponogov's triangle comparison theorem on\nmanifolds wit
h nonnegative sectional curvature\, Gromov has proposed a\ncomparison prin
ciple for polytopes carrying metrics with nonnegative\nscalar curvature. I
n this lecture\, we will discuss a recent result\nwhich verifies Gromov's
conjecture under a stronger hypothesis. The\nproof uses the Fredholm theor
y for Dirac operators on manifolds with\nboundary\, as well as an estimate
from harmonic analysis due to\nFefferman and Phong.
DTSTART:20240301T190000Z
DTEND:20240301T200000Z
LAST-MODIFIED:20240301T202439Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Marston Morse Lectures
URL:https://www.ias.edu/math/events/marston-morse-lectures-108
END:VEVENT
BEGIN:VEVENT
UID:34646462-6132-4838-a636-646236336134
DTSTAMP:20240519T012344Z
CREATED:20240223T160315Z
DESCRIPTION:Topic: Galaxy morphology in HSC-SSP and TNG\n\nSpeakers: Hua Ga
o
DTSTART:20240301T190000Z
DTEND:20240301T200000Z
LAST-MODIFIED:20240223T160315Z
LOCATION:Zoom and Broadmead 102
SUMMARY:Princeton University Survey Science Discussion
URL:https://www.ias.edu/sns/events/princeton-university-survey-science-disc
ussion-4
END:VEVENT
BEGIN:VEVENT
UID:62353466-3831-4262-a362-326566363630
DTSTAMP:20240519T012344Z
CREATED:20240201T140759Z
DESCRIPTION:Topic: Trace Class Maps and Nuclearity\n\nSpeakers: Tasos Mouli
nos\n\nIntroduce the notion of nuclear object in a symmetric monoidal stab
le\n($\infty$-)category and discuss its properties. In particular\, prove
\nthat if the monoidal unit is compact\, then an object is dualizable if\n
and only if it is compact and nuclear. Introduce the notions of trace\ncla
ss maps and basic nuclear objects. Prove that the full subcategory\nof nuc
lear objects is generated under colimits by basic nuclear\nobjects. Discus
s the notion of inner nuclearity. Prove that for a\ndiscrete Huber pair $(
A\,A^+)$\, the full subcategory of nuclear objects\nin $\mathcal{D}((A\,A^
+)_\blacksquare)$ is precisely the derived\ncategory $\mathcal{D}(A)$.
DTSTART:20240301T193000Z
DTEND:20240301T213000Z
LAST-MODIFIED:20240201T140758Z
LOCATION:Princeton University\, Fine Hall 314
SUMMARY:Condensed Learning Seminar
URL:https://www.ias.edu/math/events/condensed-learning-seminar-15
END:VEVENT
BEGIN:VEVENT
UID:39373632-6534-4061-b738-653032626264
DTSTAMP:20240519T012344Z
CREATED:20231207T142956Z
DESCRIPTION:Topic: Arithmetic Study Behind Spectra of Quantum Interactions
\n\nSpeakers: Masato Wakayama\n\nInteraction models discussed here are the
(asymmetric) quantum Rabi\nmodel (QRM)\, which describes the interaction
between a photon and\ntwo-level atoms\, and the non-commutative harmonic o
scillator (NCHO).\nThe latter can be considered as a covering model of the
former\, that\nis obtained through the confluence process of regular sing
ularities\nvia respective Heun’s ODE pictures. Spectral degeneracy can occ
ur in\nboth models\, but correspondingly there is a hidden symmetry which
has\ngeometrical nature like elliptic curves. In addition\, the analytical
\nformula for the heat kernel (propagator)/partition function of the QRM\n
is described as a discrete path integral and gives the meromorphic\ncontin
uation of its spectral zeta function. Furthermore\, the series\n(“discrete
path integral”) can be interpreted to the irreducible\ndecomposition of t
he infinite symmetry group S1 naturally acting on\nZ12 \, Z2 being the bin
ary field. Moreover\, from the special value of\nthe spectral zeta functio
n of the NCHO\, an analogue of the Apéry\nnumbers is naturally appearing\,
and their generating functions are\,\ne.g. given by a modular form\, Eich
ler integral of a congruence\nsubgroup. \n\nI would like to overview those
above and present questions which are\nopen.
DTSTART:20240301T210000Z
DTEND:20240301T220000Z
LAST-MODIFIED:20240402T123702Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Analysis and Mathematical Physics
URL:https://www.ias.edu/math/events/analysis-and-mathematical-physics-25
END:VEVENT
BEGIN:VEVENT
UID:61323838-3561-4035-a434-386131343365
DTSTAMP:20240519T012344Z
CREATED:20231212T162619Z
DESCRIPTION:Topic: Explicit SoS Lower Bounds from High Dimensional Expander
s\n\nSpeakers: Max Hopkins\n\nWhere are the hard problems? In the absence
of a proof of P ≠ NP\,\nresearchers have spent years proving unconditional
lower bounds for\nconstrained models of computation. In time\, a distinct
theme\narose: _random _problems (in particular random combinatorial\nopti
mization problems) are typically hard—fooling even our most\npowerful algo
rithmic frameworks like the Sum-of-Squares\nHierarchy._ _Despite this\, fi
nding such a hard\nproblem _explicitly_ has remained a major challenge: fo
r over 20\nyears\, no better method was known than brute force search. In
this\ntalk\, I will describe recent joint work with Ting-Chun Lin resolvin
g\nthis problem: a construction of explicit and near-optimally hard\n`cons
traint satisfaction problems’ for Sum-of-Squares based on\ntopological hig
h dimensional expanders.\n\nIn more detail\, in the first part of this tal
k I will give a brief\n`motivational’ introduction to Sum-of-Squares\, rev
iew Grigoriev’s\n1999 result proving hardness of random_ _XOR-instances fo
r\nSoS/refutation\, and discuss its close connection with the ubiquitous\n
notion of _graph expansion. _In the second part of the talk\,\nbuilding on
work of Dinur\, Filmus\, Harsha\, and Tulsiani (ITCS 2021) I\nwill show h
ow high dimensional expansion arises as a natural method of\nde-randomizin
g Grigoriev’s proof. Finally\, I’ll discuss the\nexistence of explicit con
structions of high dimensional expanders\,\ncompleting the proof. \n\nNo b
ackground in Sum-of-Squares or high dimensional expansion\nrequired!
DTSTART:20240304T160000Z
DTEND:20240304T170000Z
LAST-MODIFIED:20240502T192446Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-564
END:VEVENT
BEGIN:VEVENT
UID:38636361-3836-4438-b432-393136356666
DTSTAMP:20240519T012344Z
CREATED:20240122T152233Z
DESCRIPTION:Topic: CLusters in the Uv as EngineS (CLUES). II. Sub-kpc scale
outflows driven by stellar feedback\n\nSpeakers: Jiayi Sun\n\nEach week\,
we hold a relatively informal seminar/discussion series\nwith an emphasis
on extra-galactic and large-scale structure\nastrophysics.\n\nDuring Galr
ead a leader/visitor presents a recent paper to the\ndiscussion group. The
PDF of the paper is projected onto a large\nscreen\, and a guest explains
the paper\, section by section\, in greater\ndetail than may be explained
within the text of the article. To aid\nwith discussion\, only the articl
e PDF is presented -- no\npowerpoint-style slides. Galread discussions are
very friendly and\ninteractive.
DTSTART:20240304T160000Z
DTEND:20240304T170000Z
LAST-MODIFIED:20240301T192703Z
LOCATION:Zoom and Peyton Hall\, Grand Central
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-90
END:VEVENT
BEGIN:VEVENT
UID:66353962-6131-4465-b462-636161343839
DTSTAMP:20240519T012344Z
CREATED:20240122T151058Z
DESCRIPTION:Topic: General Discussion
DTSTART:20240304T170000Z
DTEND:20240304T180000Z
LAST-MODIFIED:20240301T191309Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-106
END:VEVENT
BEGIN:VEVENT
UID:35626339-6637-4138-a461-616165313262
DTSTAMP:20240519T012344Z
CREATED:20240301T191028Z
DESCRIPTION:Topic: Exploring Beyond-LCDM Models with Bayesian and Frequenti
st Statistics\n\nSpeakers: Laura Herold\n\nWhile cosmological parameter in
ference is predominantly Bayesian\, in\nthis talk\, I will discuss how fre
quentist statistics can be used as a\ncomplementary method for parameter i
nference. I will introduce the\nfrequentist profile likelihood and discuss
in which cases it can give\ndifferent results than the ones inferred from
Bayesian posteriors. As\nan example\, I will focus on the constraints of
the early dark energy\n(EDE) model\, a proposed solution to the Hubble ten
sion. For this\nmodel\, frequentist and Bayesian inference under _Planck_
cosmic\nmicrowave background and BOSS galaxy clustering data give differen
t\nresults: while the Bayesian analysis clearly disfavours the EDE model\,
\nthe frequentist analysis allows for sufficient amounts of EDE to\nresolv
e the tension. As a way forward\, more data can help to restore\nthe conco
rdance between the two statistical approaches.
DTSTART:20240304T173000Z
DTEND:20240304T190000Z
LAST-MODIFIED:20240301T191028Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-73
END:VEVENT
BEGIN:VEVENT
UID:61663363-6233-4738-b333-653330623434
DTSTAMP:20240519T012344Z
CREATED:20240112T154754Z
DESCRIPTION:Topic: Constraints on Contact Type Hypersurfaces in Symplectic
4-Manifolds\n\nSpeakers: Thomas Mark\n\nIn joint work with Bulent Tosun\,
it was shown that Heegaard Floer\ntheory provides an obstruction for a con
tact 3-manifold to embed as a\ncontact type hypersurface in standard sympl
ectic 4-space. As one\nconsequence\, no Brieskorn homology sphere admits s
uch an embedding\n(regardless of the contact structure). I will review the
ideas that\nlead to these results\, and discuss recent extensions that ca
n obstruct\nsuitably convex embeddings in closed symplectic 4-manifolds\,
\nparticularly rational complex surfaces.
DTSTART:20240304T173000Z
DTEND:20240304T184500Z
LAST-MODIFIED:20240304T153153Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Symplectic Geometry Seminar
URL:https://www.ias.edu/math/events/symplectic-geometry-seminar-13
END:VEVENT
BEGIN:VEVENT
UID:36353734-6466-4531-b433-363039366462
DTSTAMP:20240519T012344Z
CREATED:20231206T155950Z
DESCRIPTION:Topic: Pro-Etale Cohomology of Rigid-Analytic Spaces\n\nSpeaker
s: Johannes Anschütz\n\nIn this talk I want to explain some surprising fea
tures of the\npro-etale cohomology of rigid-analytic varieties\, and how t
hey can be\nexplained by a six functor formalism with values in solid\nqua
si-coherent sheaves on the Fargues-Fontaine curve. \n\nThis is joint work
in progress with Arthur-Cesar Le Bras and Lucas\nMann.
DTSTART:20240304T203000Z
DTEND:20240304T213000Z
LAST-MODIFIED:20240403T154038Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Joint IAS/Princeton Arithmetic Geometry Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-arithmetic-geometry-
seminar-15
END:VEVENT
BEGIN:VEVENT
UID:30333630-3135-4563-b866-303536353939
DTSTAMP:20240519T012344Z
CREATED:20231218T154916Z
DESCRIPTION:Topic: Locally Consistent Decomposition of Strings with Applica
tions to Edit Distance Sketching\n\nSpeakers: Michal Koucký\n\nEdit distan
ce is a similarity measure for strings that counts how many\ncharacters ha
ve to be deleted\, inserted or substituted in one string\nto get another o
ne. It has many applications from comparing DNA\nsequences to text process
ing. We are still in search for its most\nefficient algorithms and its exa
ct computational complexity is still\nunknown. In this talk I will focus o
n sketching edit distance which\ncould provide an ultimate algorithm for e
dit distance in the context\nof large databases of strings. \n\nThe goal i
s to compute for each string a short sketch such that from\nsketches of tw
o strings we can estimate their edit distance. This has\nconnection to emb
edding of metric spaces.\n\nIn this talk I will provide an overview of wha
t is known about\nsketching edit distance\, and I will present a new local
ly consistent\ndecomposition of strings which has applications for sketchi
ng of edit\ndistance and approximate pattern matching.\n\nThis is based on
recent results with Sudatta Bhattacharya and Mike\nSaks.
DTSTART:20240305T153000Z
DTEND:20240305T173000Z
LAST-MODIFIED:20240502T192417Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-557
END:VEVENT
BEGIN:VEVENT
UID:34343236-3130-4638-a164-353733376631
DTSTAMP:20240519T012344Z
CREATED:20240122T154314Z
DESCRIPTION:The Bahcall Lunch follows the astrophysics colloquium lecture.
DTSTART:20240305T173000Z
DTEND:20240305T183000Z
LAST-MODIFIED:20240122T154325Z
LOCATION:Lewis Library\, Princeton University
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-65
END:VEVENT
BEGIN:VEVENT
UID:39326165-3564-4766-b064-303562313939
DTSTAMP:20240519T012344Z
CREATED:20240122T161315Z
DESCRIPTION:Topic: Journal Club
DTSTART:20240305T190000Z
DTEND:20240305T200000Z
LAST-MODIFIED:20240301T192210Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Princeton University Computational Astrophysics Club
URL:https://www.ias.edu/sns/events/princeton-university-computational-astro
physics-club-29
END:VEVENT
BEGIN:VEVENT
UID:62303138-3238-4462-a133-323935623935
DTSTAMP:20240519T012344Z
CREATED:20240112T153748Z
DESCRIPTION:Topic: Propagation of Randomness Under Nonlinear Wave Equations
\n\nSpeakers: Bjoern Bringmann\n\nIn recent years\, there has been much wo
rk on nonlinear wave equations\nwith random initial data. Most of this wor
k has focused on the\nbehavior of such nonlinear waves on small scales. In
this talk\, I will\npose a problem concerning the behavior on large scale
s\, for which none\nof the available tools seem to work.
DTSTART:20240306T230000Z
DTEND:20240307T010000Z
LAST-MODIFIED:20240301T193501Z
LOCATION:Birch Garden\, Simons Hall
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-272
END:VEVENT
BEGIN:VEVENT
UID:39366234-6636-4131-b464-363635663862
DTSTAMP:20240519T012344Z
CREATED:20240122T164606Z
DESCRIPTION:Topic: High energy neutrinos from Tidal Disruption Events.\n\nS
peakers: Cecilia Lunardini\n\nStar-shredding supermassive black holes (Tid
al Disruption Events\,\nTDEs) are potential emitters of high energy hadron
s and neutrinos.\nSeveral TDEs have been observed as coincident with neutr
ino events\ndetected at the IceCube neutrino observatory. I will review th
ese\nrecent multimessenger observations\, and present models of neutrino\n
emission in TDEs that successfully interpret the data. Emphasis will\nbe o
n the hypothesis of a direct connection between the neutrino\nemission and
the observed infrared dust echoes of the candidate TDEs.\nBroader implica
tions will be discussed at the end.
DTSTART:20240307T160000Z
DTEND:20240307T170000Z
LAST-MODIFIED:20240305T131759Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-91
END:VEVENT
BEGIN:VEVENT
UID:39363161-6130-4163-a664-363264656534
DTSTAMP:20240519T012344Z
CREATED:20240207T190612Z
DESCRIPTION:Topic: What is a Venetian Blind?\n\nSpeakers: Alan Chang
DTSTART:20240307T180000Z
DTEND:20240307T190000Z
LAST-MODIFIED:20240403T154205Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-22
END:VEVENT
BEGIN:VEVENT
UID:66303662-3664-4366-b463-343463346333
DTSTAMP:20240519T012344Z
CREATED:20240301T194430Z
DESCRIPTION:Topic: The Interplay of Star Formation and Radiative Feedback a
cross Cosmic Time\n\nSpeakers: Shyam Menon\n\nStar formation in galaxies a
re governed by the complex interplay of\nseveral nonlinear physical mechan
isms operating in the interstellar\nmedium (ISM). However\, in spite of th
e underlying complexity\, there is\noverwhelming evidence for fundamental
scaling relations and trends\ngoverning the conversion of gas to stars tha
t seem to imply a\nself-regulating agent at play -- studies over the past
decade have\nhighlighted that stellar feedback play the role of this\nself
-regulating agent. Specifically\, the radiation emitted by young\nmassive
stars have been shown to play a pivotal role in regulating the\nstar forma
tion efficiency in\, and controlling the evolutionary cycle\nof\, GMCs in
weakly star-forming galaxies in the local Universe.\nHowever\, the nature
of star formation and feedback in highly dense\,\ncompact\, environments -
- such as encountered in extreme environments\nlike IR-bright galaxies in
the local Universe\, and more commonly in\ncompact high redshift galaxies
-- and its implications are yet to be\nfully explored. This regime result
in starbursts that form massive\,\ncompact\, proto-globular clusters\, the
feedback from which could have\nimportant dynamical consequences on their
host galaxies. In this talk\nI will present novel radiation hydrodynamic
simulations that provide\nvaluable insight to this regime. I will touch up
on the unique\nnumerical challenges of modelling this regime and tools we
developed\nto address these technical challenges. I will specifically high
light\nthe aspects of star formation and feedback we find that are unique
to\nthis regime: the high star formation efficiencies achieved\, the\ncruc
ial role of radiation pressure on dust grains and outflows they\nlaunch\,
how they might be important contributors to reionization\, and\nhow the IM
F might be affected and would change these outcomes. I will\nconclude by s
uggesting that these insights are particularly relevant\nin interpreting t
he conditions of star formation and feedback at\nCosmic Dawn — a period no
w accessible through JWST.
DTSTART:20240307T190000Z
DTEND:20240307T200000Z
LAST-MODIFIED:20240301T194430Z
LOCATION:Serin Hall Rm W330\, Rutgers and Zoom
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
37
END:VEVENT
BEGIN:VEVENT
UID:30336163-3936-4334-b365-346139336232
DTSTAMP:20240519T012344Z
CREATED:20231204T165236Z
DESCRIPTION:Topic: Squarefree Numbers in Short Intervals\n\nSpeakers: Mayan
k R. Pandey\n\nWe count squarefree numbers in short intervals [X\, X+H] fo
r H > X^{1/5\n- $\delta$}\, where $\delta$ > 0 is some absolute constant.
This\nimproves on the exponent 1/5 shown by Filaseta and Trifonov in 1992.
\n\n \n\nIn improving bounds on the number of integers in a short interva
l\ndivisible by a large square\, we introduce a technique to count lattice
\npoints satisfying certain conditions near curves. This requires as an\ni
nput Green and Tao’s quantitative version of Leibman’s theorem on\nthe equ
idistribution of polynomial orbits in nilmanifolds.
DTSTART:20240307T213000Z
DTEND:20240307T223000Z
LAST-MODIFIED:20240301T140158Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-14
END:VEVENT
BEGIN:VEVENT
UID:64383736-3038-4265-a437-316132643561
DTSTAMP:20240519T012344Z
CREATED:20240112T151825Z
DESCRIPTION:Topic: Strongly Invertible Knots\, Khovanov Homotopy\, and Loca
lization\n\nSpeakers: Robert Lipshitz\n\nStrong inversions are a class of
order-2 symmetries of knots in .\nBuilding on work of Seidel-Smith\, Lidma
n-Manolescu\, Stoffregen-Zhang\,\nand others\, we will describe a relation
ship between the Khovanov\nhomology of a knot with a strong inversion and
its quotients by the\ninversion. We will also give a modest application to
surfaces in\n4-space. This is joint work with Sucharit Sarkar. While ther
e is no\nsymplectic geometry in the talk\, many of the ideas come from or
may be\nuseful in Floer-theoretic settings.
DTSTART:20240308T141500Z
DTEND:20240308T154500Z
LAST-MODIFIED:20240308T140011Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-156
END:VEVENT
BEGIN:VEVENT
UID:39653939-3236-4662-b262-313936396465
DTSTAMP:20240519T012344Z
CREATED:20240301T203923Z
DESCRIPTION:Topic: Fast magnetic reconnection experiments at the National I
gnition Facility: flux annihilation and electron heating\n\nSpeakers: Vice
nte Valenzuela Villaseca\n\nMagnetic reconnection is a fundamental plasma
process whereby two\nmerging flows with oppositely oriented magnetic field
s drive the\nreconfiguration of the field topology inside a current sheet\
, which\nrapidly converts magnetic into kinetic energy. This ubiquitous pr
ocess\nis key to understanding a wide range of systems\, such as coronal m
ass\nejections in the Sun\, Active Galactic Nuclei flares\, and sawtooth\n
crashes in tokamaks. One of the outstanding questions in magnetic\nreconne
ction regards the energy partition between thermal heating\,\nbulk acceler
ation\, and non-thermal particles.\n\nIn this talk\, I will present result
s from a dedicated laser-driven\nmagnetic reconnection laboratory platform
fielded at the National\nIgnition Facility (NIF). Two highly extended pla
sma plumes are\nproduced by tiling a total of 40 laser beams which become
\nself-magnetized through the Biermann battery effect. As they collide\,\n
they form a reconnecting current sheet in the interaction region with\na h
igh aspect ratio ~100.\n\nThe magnetic field structure and evolution is pr
obed using proton\nradiography with inertial confinement fusion capsules a
s backlighters\,\nwhich show a peak plume line-integrated magnetization ~
7.5 T⋅mm.\nThe out-of-plane dynamics was studied using gated X-ray detecto
rs\,\nfinding significant electron heating\; however we also find that\nco
nversion of magnetic to thermal energy is insufficient to explain\nthe obs
erved temperature increase. I will discuss the role of\nelectron-ion Coulo
mb collisions in a background of free-streaming ions\nand show that they m
ay account for the anomalous heating found in\nthese experiments.
DTSTART:20240308T173000Z
DTEND:20240308T183000Z
LAST-MODIFIED:20240301T203923Z
LOCATION:Dome Room\, Peyton Hall or Zoom
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-68
END:VEVENT
BEGIN:VEVENT
UID:33376439-3766-4465-b339-633035363233
DTSTAMP:20240519T012344Z
CREATED:20240306T190129Z
DESCRIPTION:Topic: Invariant Sets in Three-Dimensional Energy Surfaces\n\nS
peakers: Rohil Prasad\n\nLet $H$ be any smooth function on $R^4$ and let $
Y$ be any compact and\nregular level set. I'll explain a proof that $Y$ ad
mits an infinite\nfamily of proper compact subsets that are invariant unde
r the\nHamiltonian flow\, which moreover have dense union in $Y$. This\nim
proves on a recent result by Fish-Hofer.\n \n\n
DTSTART:20240308T180000Z
DTEND:20240308T190000Z
LAST-MODIFIED:20240308T140203Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special IAS/PU Symplectic Geometry Seminar
URL:https://www.ias.edu/math/events/special-iaspu-symplectic-geometry-semin
ar
END:VEVENT
BEGIN:VEVENT
UID:61393466-3533-4366-a131-653039303166
DTSTAMP:20240519T012344Z
CREATED:20231207T143027Z
DESCRIPTION:Topic: Variations on Fefferman's Ball Multiplier Theorem\n\nSpe
akers: Mikael De La Salle\n\nWhat happens to an Lp function when one trunc
ates its Fourier\ntransform to a domain? This question is now rather well
understood\,\nthanks to famous results by Marcel Riesz and Charles Fefferm
an\, and\nthe answer depends on the domain: if it is a polytope\, the func
tion\nremains Lp integrable. But not necessarily when the domain is curved
\,\nsuch as a Euclidean ball. The lecture will be devoted to another\nques
tion of the same flavour: What happens to a matrix and its\nsingular value
s when some of its entries are set to zero? My goal will\nbe to explain un
expected relations betweeen the two questions\, which\nlead to a satisfact
ory answer to the second. \n\nBased on a joint work with Javier Parcet and
Eduardo Tablate.
DTSTART:20240308T193000Z
DTEND:20240308T203000Z
LAST-MODIFIED:20240402T123756Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Analysis and Mathematical Physics
URL:https://www.ias.edu/math/events/analysis-and-mathematical-physics-26
END:VEVENT
BEGIN:VEVENT
UID:33626636-3133-4635-b337-356132646439
DTSTAMP:20240519T012344Z
CREATED:20231212T162730Z
DESCRIPTION:Topic: Sparsification of Gaussian Processes\n\nSpeakers: Anindy
a De\n\nIn this talk\, we will show that the supremum of any centered Gaus
sian\nprocess can be approximated to any arbitrary accuracy by a finite\nd
imensional Gaussian process where the dimension of the approximator\nis ju
st dependent on the target error. As a corollary\, we show that\nfor any n
orm \Phi defined over R^n and target error \eps\, there is a\nnorm \Psi su
ch that (i) \Psi is only dependent on t(\eps) = \exp \exp\n(poly(1/\eps))
dimensions and (ii) \Psi(x)/\Phi(x) \in [1-\eps\, 1+\n\eps] with probabili
ty 1-\eps (when x is sampled from the Gaussian\nspace). Our proof relies o
n Talagrand's majorizing measures theorem. \n\nJoint work with Shivam Nadi
mpalli\, Ryan O'Donnell and Rocco\nServedio.
DTSTART:20240311T150000Z
DTEND:20240311T160000Z
LAST-MODIFIED:20240502T192340Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-565
END:VEVENT
BEGIN:VEVENT
UID:61633966-3338-4166-a131-393832643430
DTSTAMP:20240519T012344Z
CREATED:20240122T152255Z
DESCRIPTION:Topic: Regulation of Star Formation by a Hot Circumgalactic Med
ium\n\nSpeakers: Chris Carr\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.
DTSTART:20240311T150000Z
DTEND:20240311T160000Z
LAST-MODIFIED:20240311T122907Z
LOCATION:Zoom and Peyton Hall\, Grand Central
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-91
END:VEVENT
BEGIN:VEVENT
UID:33366463-3733-4836-a366-666330623737
DTSTAMP:20240519T012344Z
CREATED:20240122T151118Z
DESCRIPTION:Topic: General Discussion
DTSTART:20240311T160000Z
DTEND:20240311T170000Z
LAST-MODIFIED:20240311T122952Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-107
END:VEVENT
BEGIN:VEVENT
UID:63383261-3239-4633-b039-656235386536
DTSTAMP:20240519T012344Z
CREATED:20240112T160905Z
DESCRIPTION:Topic: Relative Calabi-Yau Structures for Legendrian Contact Ho
mology\n\nSpeakers: Joshua Sabloff\n\nLegendrian Contact Homology (LCH) wa
s among the first\, and is still\namong the most important\, non-classical
invariants of Legendrian\nknots. In this talk\, I will tell a story that
builds up ever more\nsophisticated analogues of Poincare Duality in LCH. D
espite the\nalgebraic nature of the talk\, I promise pictures and examples
. This is\njoint work with Jason Ma (Duke) and\, towards the end\, work in
progress\nin conversation with Zhenyi Chen (Northwestern).\n \n\n
DTSTART:20240311T163000Z
DTEND:20240311T174500Z
LAST-MODIFIED:20240305T163127Z
LOCATION:Rubenstein Commons | Meeting Room 5
SUMMARY:Symplectic Geometry Seminar
URL:https://www.ias.edu/math/events/symplectic-geometry-seminar-23
END:VEVENT
BEGIN:VEVENT
UID:33623737-3464-4736-b237-663032616633
DTSTAMP:20240519T012344Z
CREATED:20240311T122535Z
DESCRIPTION:Topic: A new five-sigma tension in the standard cosmological mo
del: twenty years of growing evidence for new physics in the Lyman-alpha f
orest\n\nSpeakers: Keir Rogers\n\nPrecision observations of the cosmos hav
e established the concordance\nmodel of cosmology\, but deep questions rem
ain about the origin of\ncosmic structure and the fundamental nature of th
e dark sector.\nFurther\, significant discrepancies have arisen in the inf
erence of\nbasic model parameters: the Universe's expansion rate H_0 and m
atter\nclustering amplitude S_8. I will present the measurement of a new\,
\nfive-sigma parameter tension between Planck cosmic microwave\nbackground
and eBOSS Lyman-alpha forest data in their inference of the\nsmall-scale
linear matter power spectrum (at wavenumber ~ 1 h/Mpc\,\nredshift = 3). I
will discuss resolutions to this tension either in\npopulations of ultra-l
ight axions (ULAs) or warm dark matter\, or\nrunning in the primordial pow
er spectrum which can inform us about the\nnature of cosmic inflation. The
strong preference for power spectrum\nrunning that we find builds on twen
ty years of growing evidence from\nWMAP to Planck and SDSS-1 to eBOSS. I w
ill also discuss potential\nLyman-alpha forest systematics\, in particular
strong absorption\nsystems\, and the urgency needed to understand the sou
rce of this\ntension in light of imminent Dark Energy Spectroscopic Instru
ment\nanalyses. Finally\, I will discuss the context of this result in lig
ht\nof previous results demonstrating that ULAs also alleviate the S_8\nte
nsion — and upcoming complementary probes of the small-scale\nstructure in
Milky Way stellar streams.
DTSTART:20240311T163000Z
DTEND:20240311T180000Z
LAST-MODIFIED:20240311T122535Z
LOCATION:IAS\, West Seminar Room or Peyton Hall\, Grand Central
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-74
END:VEVENT
BEGIN:VEVENT
UID:63616436-3437-4166-a266-353663363131
DTSTAMP:20240519T012344Z
CREATED:20240129T161945Z
DESCRIPTION:Topic: The Structure of Translational Tilings in Z^d\n\nSpeaker
s: Rachel Greenfeld\n\nA finite set $F$ in $\mathbb{Z}^d$ is a translation
al tile of \n$\mathbb{Z}^d$ if one can cover $\mathbb{Z}^d$ by translated
copies\nof $F$ without any overlaps\, i.e.\, there exists a translational
\ntiling of $\mathbb{Z}^d$ by $F$. Suppose that $F$ is a translational\nt
ile\; what can we say about the structure of tilings by $F$? In the\ntalk
we will discuss this question and introduce techniques\,\nconjectures\, r
esults\, and open problems in the area.
DTSTART:20240312T143000Z
DTEND:20240312T163000Z
LAST-MODIFIED:20240502T192312Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-558
END:VEVENT
BEGIN:VEVENT
UID:38373766-6232-4261-a333-373762363162
DTSTAMP:20240519T012344Z
CREATED:20240122T145958Z
DESCRIPTION:Topic: Super-Massive Black Hole Winds: An X-Ray Perspective\n\n
Speakers: Erika Bernadette Hoffman\n\nSupermassive black holes (SMBH) at t
he centers of galaxies play a\npivotal role in the evolution of the galaxy
they reside in\, but the\nphysics to explain how this occurs remains poor
ly understood. As\nnearby matter is attracted to a black hole\, it forms a
hot\, dense disk\nin which some particles can eventually shed enough ener
gy via friction\nto fall into the black hole\, a process known as accretio
n. Intensely\naccreting supermassive black holes\, also called Active Gala
ctic Nuclei\n(AGN)\, are the most luminous\, persistent astronomical sourc
es in the\nsky\, so bright they can outshine all the stars in their galaxy
. Their\noutflowing radiation coupled with disk matter being ejected away
as\njets and winds yields a surprisingly difficult environment for SMBHs\n
to gain mass and have drastic effects on their surrounding galaxies.\nIn t
his talk\, I will discuss how specifically high-energy disk winds\nlaunche
d from close to the black hole\, detectable via their\ninteractions with X
-rays\, have a strong potential to explain\nSMBH-galaxy relationships. Alt
hough these regions are too small and\ndistant to resolve in images\, we c
an determine key wind properties by\nanalyzing high-resolution X-ray spect
roscopic observations. Obtaining\nmeasurements from this data can be chall
enging since it requires\ncomplex physical and statistical calculations. H
owever\, recent\nimprovements in models\, methods\, computing power\, and
the new data\nfrom the recently launched X-ray Imagining and Spectroscopy
Mission\n(XRISM)\, can give us completely new\, key insights into the unde
rlying\nphysics and overall impact of SMBH winds on galaxies.
DTSTART:20240312T233000Z
DTEND:20240313T013000Z
LAST-MODIFIED:20240311T123335Z
LOCATION:Peyton Hall & Zoom
SUMMARY:Amateur Astronomers Association of Princeton (AAAP) Monthly Meeting
URL:https://www.ias.edu/sns/events/amateur-astronomers-association-princeto
n-aaap-monthly-meeting-26
END:VEVENT
BEGIN:VEVENT
UID:64343135-3764-4761-a663-373239646262
DTSTAMP:20240519T012344Z
CREATED:20240112T153812Z
DESCRIPTION:Topic: Equivariant Log-Concavity and the Hard Lefschetz Theorem
\n\nSpeakers: Shiyue Li\n\nWhat do graph matchings and independent vertex
sets have to do with\nthe cohomology of products of projective lines? I wi
ll share with you\nan example in the study of “equivariant log-concavity”\
, which\nenriches the notion of log-concavity. By keeping in mind the symm
etry\nwhile playing with the underlying combinatorial objects\, we will\nr
ediscover log-concavity using the hard Lefschetz theorem in Hodge\ntheory.
Non-technical talk\; nothing is assumed beyond linear algebra\nand basic
graph theory. \n\n
DTSTART:20240313T220000Z
DTEND:20240314T000000Z
LAST-MODIFIED:20240306T185437Z
LOCATION:Birch Garden\, Simons Hall
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-273
END:VEVENT
BEGIN:VEVENT
UID:35636365-6534-4164-a165-356236616635
DTSTAMP:20240519T012344Z
CREATED:20240122T164805Z
DESCRIPTION:Topic: The S(igma) 8 tension at the onset of stage-IV surveys\n
\nSpeakers: Nickolas Kokron\n\nIn 1970\, Allan Sandage famously described
Cosmology as 'A search for\ntwo numbers'. In the half-century since that d
escription of the field\nwas penned\, as Stage III cosmic surveys come to
an end and Stage-IV\nsurveys begin taking data\, the field finds itself ha
ving measured the\nsix parameters of the concordance ΛCDM model at nearly
1% precision.\nHowever\, different experiments now report different values
for two of\nthese parameters -- namely the Hubble Constant and the varian
ce of\ndark matter density fluctuations\, S(igma) 8 -- at varying levels o
f\nsignificance. This new 'search for two numbers' is now a significant\ns
cience driver for stage-IV cosmic surveys. I will present an overview\nof
the current status of measurements of S(igma) 8 and why we expect\nthe cur
rent picture will soon change significantly. I will\nspecifically argue fo
r the importance of galaxy clustering surveys as\nan intermediate arbiter
between large-scale measurements from the CMB\nand small-scale measurement
s from cosmic shear surveys. The incredible\nprecision of next-generation
surveys also begets highly accurate\nmodelling of summary statistics. I wi
ll describe the challenges\nassociated with deriving unbiased cosmological
information from new\nsurveys and show how two seemingly disparate modell
ing approaches --\nperturbation theory and simulations -- can be fruitfull
y combined to\npave the way for model-building in the stage-IV era.
DTSTART:20240314T150000Z
DTEND:20240314T160000Z
LAST-MODIFIED:20240312T153131Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-88
END:VEVENT
BEGIN:VEVENT
UID:66386661-3638-4362-b137-363136373337
DTSTAMP:20240519T012344Z
CREATED:20240216T185438Z
DESCRIPTION:Topic: Moments of Quadratic L-Functions Over Function Fields \n
\nSpeakers: Adrian Diaconu\n\nIn 2001\, Conrey\, Farmer\, Keating\, Rubins
tein\, and Snaith developed a\n'recipe' utilizing heuristic arguments to p
redict the asymptotics of\nmoments of various families of L-functions. Thi
s heuristic was later\nextended by Andrade and Keating to include moments
and ratios of the\nfamily of L-functions associated to hyperelliptic curve
s of genus g\nover a fixed finite field. \n\n \n\nIn joint work with Bergs
tröm\, Petersen\, and Westerland\, we related\nthe moment conjecture of An
drade and Keating to the problem of\nunderstanding the homology of the bra
id group with symplectic\ncoefficients. We computed the stable homology gr
oups of the braid\ngroups with these coefficients\, together with their st
ructure as\nGalois representations\, and showed that the answer matches th
e\nnumber-theoretic predictions. Our results\, combined with a recent\nhom
ological stability theorem of Miller\, Patzt\, Petersen\, and\nRandal-Will
iams\, imply the conjectured asymptotics for all moments in\nthe function
field case\, for all large enough odd prime powers q.
DTSTART:20240314T203000Z
DTEND:20240314T213000Z
LAST-MODIFIED:20240307T143142Z
LOCATION:*Princeton University\, Fine 214*
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-22
END:VEVENT
BEGIN:VEVENT
UID:39383537-3933-4135-b162-643562666264
DTSTAMP:20240519T012344Z
CREATED:20240112T151855Z
DESCRIPTION:Topic: Quantitative Floer Theory and Coefficients\n\nSpeakers:
Yusuke Kawamoto\n\nI will discuss how much the choice of coefficients impa
cts the\nquantitative information of Floer theory\, especially spectral\ni
nvariants. In particular\, I will present some phenomena that are\nspecifi
c to integer coefficients\, including an answer to a variant of\na questio
n posed by Nancy Hingston. The material is based on a joint\nwork with Ego
r Shelukhin.
DTSTART:20240315T131500Z
DTEND:20240315T144500Z
LAST-MODIFIED:20240315T114635Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-142
END:VEVENT
BEGIN:VEVENT
UID:30316362-3734-4366-b339-613837376564
DTSTAMP:20240519T012344Z
CREATED:20231212T162901Z
DESCRIPTION:Topic: Computationally Sound Proofs of Network Properties\n\nSp
eakers: Rotem Oshman\n\nIn distributed certification\, our goal is to cert
ify that a network\nhas a certain desired property\, e.g.\, the network is
connected\, or the\ninternal states of its nodes encode a valid spanning
tree of the\nnetwork. To this end\, a prover generates certificates that a
re stored\nat each network node\, and the nodes can then interact with one
another\nin order to check their certificates and verify that the propert
y\nholds. This can be viewed as a distributed analog of NP. However\, like
\nmost theoretical models of distributed computing\, the traditional\nmode
l for distributed certification is information-theoretic: the\nprover and
the network nodes are computationally unbounded\, and the\nonly efficiency
measures we consider are the length of the\ncertificates and the communic
ation required to verify them. The\ninformation-theoretic nature of the mo
del sets the area of distributed\ncertification apart from classical compl
exity theory\, and also makes\nit subject to strong lower bounds from the
world of nondeterministic\ncommunication complexity.\n\nIn this talk\, I w
ill describe a computationally sound version of\ndistributed certification
\, where the prover and the network nodes are\nrequired to run in polynomi
al time in the size of the network.\nIntroducing computational restriction
s allows us to leverage\ncryptography\, and we show that any network prope
rty in P can be\ncertified using certificates of polylogarithmic length by
a global\nprover that sees the entire network. Ideally\, however\, we wou
ld like\nthe prover to also be distributed\, and we show that this can be
done\nas well: any polynomial distributed algorithm can efficiently certif
y\nits own execution with low overhead in terms of communication and\nroun
ds. The main challenge in the distributed setting is that no\nsingle netwo
rk node can see the entire execution of the algorithm.\n\nThis is joint wo
rk with Eden Aldema Tshuva\, Elette Boyle\, Ran Cohen\nand Tal Moran. No b
ackground in cryptography is assumed for the talk.
DTSTART:20240318T150000Z
DTEND:20240318T160000Z
LAST-MODIFIED:20240502T192242Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-566
END:VEVENT
BEGIN:VEVENT
UID:37393533-3733-4364-b165-303934653339
DTSTAMP:20240519T012344Z
CREATED:20240122T152314Z
DESCRIPTION:Topic: AGN properties of ∼1 million member galaxies of galaxy g
roups and clusters > at z < 1.4 based on the Subaru Hyper Suprime-Cam surv
ey.\n\nSpeakers: Justin Myles\n\nEach week\, we hold a relatively informal
seminar/discussion series\nwith an emphasis on extra-galactic and large-s
cale 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 sectio
n\, in greater\ndetail than may be explained within the text of the articl
e. To aid\nwith discussion\, only the article PDF is presented -- no\npowe
rpoint-style slides. Galread discussions are very friendly and\ninteractiv
e.
DTSTART:20240318T150000Z
DTEND:20240318T160000Z
LAST-MODIFIED:20240318T130805Z
LOCATION:Zoom and Peyton Hall\, Grand Central
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-92
END:VEVENT
BEGIN:VEVENT
UID:31323733-6436-4666-b763-613139363566
DTSTAMP:20240519T012344Z
CREATED:20240122T151135Z
DESCRIPTION:Topic: General Discussion
DTSTART:20240318T160000Z
DTEND:20240318T170000Z
LAST-MODIFIED:20240318T130501Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-108
END:VEVENT
BEGIN:VEVENT
UID:38303237-3265-4235-a263-633966316364
DTSTAMP:20240519T012344Z
CREATED:20240112T155216Z
DESCRIPTION:Topic: The Shape Invariant for Toric Domains.\n\nSpeakers: Rich
ard Hind\n\nWe discuss the shape invariant\, a sort of set valued symplect
ic\ncapacity defined by the Lagrangian tori inside a domain of $R^4$.\nPar
tial computations for convex toric domains are sometimes enough to\ngive s
harp obstructions to symplectic embeddings\, but in general the\nshape is
far from a complete invariant. We then consider continuous\nfamilies of La
grangian embeddings\, and describe a seemingly close\nrelation to stabiliz
ed symplectic embeddings. This is ongoing work\nwith Ely Kerman and Jun Zh
ang.
DTSTART:20240318T163000Z
DTEND:20240318T174500Z
LAST-MODIFIED:20240318T114015Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Symplectic Geometry Seminar
URL:https://www.ias.edu/math/events/symplectic-geometry-seminar-14
END:VEVENT
BEGIN:VEVENT
UID:34343735-6263-4538-b130-643936333661
DTSTAMP:20240519T012344Z
CREATED:20240318T130401Z
DESCRIPTION:Topic: Exploring Tidal Effects: A New Perspective From Effectiv
e Field Theory\n\nSpeakers: Zihan Zhou\n\nTidal effects serve as a useful
tool to study compact objects. In this\ntalk\, I will present how the worl
dline effective field theory (EFT)\ncan be applied to examine the tidal re
sponses of compact objects. This\napproach offers a robust framework for p
arameterizing both\nconservative and dissipative tidal effects\, enabling
the first bound\nof dissipation numbers from the current Gravitational-wav
e Transient\nCatalog (GWTC). When applying the EFT in the fully dynamical
regime\, I\nwill show how the EFT can help study the stellar tidal disrupt
ion\nevents\, especially in identifying the corrections from relativity an
d\nstellar oscillations.
DTSTART:20240318T163000Z
DTEND:20240318T180000Z
LAST-MODIFIED:20240318T130401Z
LOCATION:IAS\, West Seminar Room
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-75
END:VEVENT
BEGIN:VEVENT
UID:32663133-6465-4730-b834-613165333633
DTSTAMP:20240519T012345Z
CREATED:20231204T184238Z
DESCRIPTION:Topic: Sum-of-Squares Proofs\, Efficient Algorithms\, and Appli
cations\n\nSpeakers: Pravesh Kothari\n\nAny non-negative univariate polyno
mial over the reals can be written\nas a sum of squares. This gives a sim
ple-to-verify certificate of\nnon-negativity of the polynomial. Rooted in
Hilbert's 17th problem\,\nthere's now more than a century's work that find
s the right\nmultivariate generalizations called Positivstellensatz theore
ms (due\nto Krivine\, Stengle\, and Putinar). Beginning in the late 1980s\
,\nresearchers (initially independent) in optimization\, quantum\ninformat
ion\, and proof complexity theory found an algorithmic\ncounterpart\, the
sum-of-squares algorithm\, of these results. Over the\npast decade\, this
algorithmic theory has matured into a powerful tool\nfor designing efficie
nt algorithms for basic problems in algorithm\ndesign.\n\n \n\nIn this tal
k\, I will outline a couple of highlights from these recent\n\ndevelopment
s:\n\n \n\n1) Algorithmic Robust Statistics: In the 1960s\, Tukey and Hube
r\nobserved that most statistical estimators are brittle -- they break\ndo
wn with almost no guarantee if the model postulated for data has\nminor mi
sspecification (say because of 1% outliers). In response\, they\ninitiated
the field of robust statistics. Over the past five years\, a\nnew bluepri
nt\, based on the sum-of-squares algorithm\, has emerged for\nefficient ro
bust statistics in high dimensions with new connections to\nfinding effici
ently verifiable certificates of concentration and\nanti-concentration pro
perties of high dimensional probability\ndistributions.\n\n \n\n2) The Kik
uchi Matrix Method: Finding (or proving that there is none)\na solution th
at satisfies 99% of a given system of k-sparse linear\nequations (i.e.\, k
non-zero coefficients in each equation) over finite\nfields is a basic NP
-hard problem and thus\, unlikely to admit\nefficient algorithms. In the e
arly 2000s\, motivated by whether the\nhard instances are 'pathological'\,
researchers explored whether\n'semirandom' equations\n\n-- arbitrary syst
ems with right-hand sides generated uniformly and\nindependently at random
-- could admit efficient algorithms that\noutput efficiently verifiable c
ertificates of unsatisfiability.\nRecently\, a restricted class of sum-of-
squares proofs was at the heart\nof efficient algorithms for such semirand
om sparse linear equations.\nSurprisingly\, these algorithms have led to n
ew progress in extremal\ncombinatorics and coding theory.
DTSTART:20240318T180000Z
DTEND:20240318T190000Z
LAST-MODIFIED:20240318T114947Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Members' Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-62
END:VEVENT
BEGIN:VEVENT
UID:39366261-6162-4165-b939-346163393533
DTSTAMP:20240519T012345Z
CREATED:20231206T180635Z
DESCRIPTION:Topic: Towards a Unified Theory of Canonical Heights on Abelian
Varieties\n\nSpeakers: Padmavathi Srinivasan\n\n_p_-adic heights have bee
n a rich source of explicit functions\nvanishing on rational points on a c
urve. In this talk\, we will outline\na new construction of canonical _p_-
adic heights on abelian varieties\nfrom _p_-adic adelic metrics\, using _p
_-adic Arakelov theory developed\nby Besser. This construction closely mir
rors Zhang's construction of\ncanonical real valued heights from real-valu
ed adelic metrics. We will\nuse this new construction to give direct expla
nations (avoiding\n_p_-adic Hodge theory) of the key properties of _p_-adi
c height\npairings needed for the quadratic Chabauty method for rational\n
points. \n\nThis is joint work with Amnon Besser and Steffen Mueller.
DTSTART:20240318T193000Z
DTEND:20240318T203000Z
LAST-MODIFIED:20240402T123829Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Joint IAS/Princeton Arithmetic Geometry Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-arithmetic-geometry-
seminar-17
END:VEVENT
BEGIN:VEVENT
UID:31353732-6632-4663-b832-633639643763
DTSTAMP:20240519T012345Z
CREATED:20240202T152130Z
DESCRIPTION:Topic: Geodesics and Minimal Surfaces in a Random Environment\n
\nSpeakers: Ron Peled\n\nEndow the edges of the $Z^D$ lattice with positiv
e weights\, sampled\nindependently from a suitable distribution (e.g.\, un
iformly\ndistributed on [a\,b] for some b>a>0). We wish to study the geome
tric\nproperties of the resulting network\, focusing on the following\ncha
llenges:\n\n * Geodesics (first-passage percolation): Given two vertices in
$Z^D$\,\nconsider the path with minimal sum of edge weights that connects
them.\nHow close is this path to a straight line?\n * Minimal surfaces: Co
nsider the cube {$-L\,...\, L$}$^D$ and the\nminimal cut separating the 'u
pper' and 'lower' halves of the boundary\nof the cube. How flat is this cu
t?\n\nI will give a gentle introduction to these challenges\, with emphasi
s\non the many open problems and some of the recently obtained results. \n
\nBased on joint works with Michal Bassan and Shoni Gilboa and with\nBarba
ra Dembin\, Dor Elboim and Daniel Hadas.
DTSTART:20240319T143000Z
DTEND:20240319T163000Z
LAST-MODIFIED:20240502T192212Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-559
END:VEVENT
BEGIN:VEVENT
UID:36636238-3062-4333-a232-653731343465
DTSTAMP:20240519T012345Z
CREATED:20240122T154344Z
DESCRIPTION:The Bahcall Lunch follows the astrophysics colloquium lecture.
DTSTART:20240319T163000Z
DTEND:20240319T173000Z
LAST-MODIFIED:20240122T154343Z
LOCATION:Lewis Library\, Princeton University
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-66
END:VEVENT
BEGIN:VEVENT
UID:31376239-6461-4135-a238-663935333936
DTSTAMP:20240519T012345Z
CREATED:20240122T161348Z
DESCRIPTION:Topic: Journal Club
DTSTART:20240319T180000Z
DTEND:20240319T190000Z
LAST-MODIFIED:20240318T124954Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Princeton University Computational Astrophysics Club
URL:https://www.ias.edu/sns/events/princeton-university-computational-astro
physics-club-30
END:VEVENT
BEGIN:VEVENT
UID:35386231-6537-4231-b365-393635613232
DTSTAMP:20240519T012345Z
CREATED:20240116T180457Z
DESCRIPTION:Topic: Atiyah Duality and Applications\n\nSpeakers: Toni Mikael
Annala
DTSTART:20240320T180000Z
DTEND:20240320T190000Z
LAST-MODIFIED:20240506T121001Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Seminar
URL:https://www.ias.edu/math/events/special-year-seminar-12
END:VEVENT
BEGIN:VEVENT
UID:37633832-3134-4536-a136-336466613539
DTSTAMP:20240519T012345Z
CREATED:20240126T160653Z
DESCRIPTION:Topic: Mixed Characteristic Affine Grassmannian\n\nSpeakers: Sa
lly Gilles
DTSTART:20240321T140000Z
DTEND:20240321T160000Z
LAST-MODIFIED:20240506T120933Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Learning Seminar
URL:https://www.ias.edu/math/events/special-year-learning-seminar-29
END:VEVENT
BEGIN:VEVENT
UID:61313539-3032-4661-a438-643733333134
DTSTAMP:20240519T012345Z
CREATED:20240122T164723Z
DESCRIPTION:Topic: Black holes and revelations: unseen companions in stella
r binaries\n\nSpeakers: Kareem El-Badry\n\nThe Milky Way contains of order
10^8 stellar-mass black holes (BHs).\nYet\, fewer than 100 BH candidates
are known\, and only about 20 are\ndynamically confirmed. Our view of the
BH population has been shaped\nalmost entirely by observations of X-ray bi
naries and gravitational\nwave sources\, both of which represent an extrem
ely rare outcome of\nbinary evolution. I will discuss recent efforts to un
cover the\n(probably) much larger population of Galactic black holes in\nn
on-interacting binaries\, focusing both on interpretation of confirmed\ndo
rmant BHs and on what can be learned about binary evolution from the\nmena
gerie of interacting binaries and stripped stars that have\nmasqueraded as
dormant BH binaries. Finally\, I will discuss our\nemerging view of the B
H mass distribution from observations of X-ray\nbinaries\, dormant BH bina
ries\, BHs detected via photometric and\nastrometric microlensing\, and BH
s in gravitational wave events.
DTSTART:20240321T150000Z
DTEND:20240321T160000Z
LAST-MODIFIED:20240312T153230Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-93
END:VEVENT
BEGIN:VEVENT
UID:65306362-6639-4764-b438-366463633031
DTSTAMP:20240519T012345Z
CREATED:20240207T190732Z
DESCRIPTION:Topic: What is a Graph Complex? \n\nSpeakers: Shiyue Li\n\nI’ll
describe graph complexes\, introduced by Kontsevich in the\ncontext of ma
thematical physics. I’ll survey its connections to\ngeometry and topology\
, highlighting its relation to the cohomology of\nmoduli spaces of curves.
DTSTART:20240321T170000Z
DTEND:20240321T180000Z
LAST-MODIFIED:20240403T154329Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-23
END:VEVENT
BEGIN:VEVENT
UID:39346537-6465-4566-b938-623563303935
DTSTAMP:20240519T012345Z
CREATED:20231204T165257Z
DESCRIPTION:Topic: Vanishing of Selmer Groups for Siegel Modular Forms\n\nS
peakers: Sam Mundy\n\nLet π be a cuspidal automorphic representation of Sp
_2n over Q which\nis holomorphic discrete series at infinity\, and χ a Dir
ichlet\ncharacter. Then one can attach to π an orthogonal p-adic Galois\nr
epresentation ρ of dimension 2n+1. Assume ρ is irreducible\, that π\nis or
dinary at p\, and that p does not divide the conductor of χ. I\nwill descr
ibe work in progress which aims to prove that the\nBloch--Kato Selmer grou
p attached to the twist of ρ by χ vanishes\,\nunder some mild ramification
assumptions on π\; this is what is\npredicted by the Bloch--Kato conjectu
res.\n\n \n\nThe proof uses 'ramified Eisenstein congruences' by construct
ing\np-adic families of Siegel cusp forms degenerating to Klingen\nEisenst
ein series of nonclassical weight\, and using these families to\nconstruct
ramified Galois cohomology classes for the Tate dual of the\ntwist of ρ b
y χ.
DTSTART:20240321T203000Z
DTEND:20240321T213000Z
LAST-MODIFIED:20240321T124920Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-15
END:VEVENT
BEGIN:VEVENT
UID:63613562-6536-4934-b238-643438653433
DTSTAMP:20240519T012345Z
CREATED:20230804T154555Z
DESCRIPTION:Topic: Scholarly Digital Editions of Arabic-Script Texts\n\nCon
veners: ADAM MESTYAN (School of Historical Studies\, IAS and Duke\nUnivers
ity)\, SABINE SCHMIDTKE (School of Historical Studies\, IAS) and\nMARÍA ME
RCEDES TUYA (Digital Scholarship @IAS). Details to follow at\na later time
.\n\n
DTSTART:20240322T130000Z
DTEND:20240322T210000Z
LAST-MODIFIED:20230822T132750Z
LOCATION:White-Levy Room
SUMMARY:NES Workshop
URL:https://www.ias.edu/hs/events/nes-workshop-1
END:VEVENT
BEGIN:VEVENT
UID:65383136-3234-4634-b638-643935653464
DTSTAMP:20240519T012345Z
CREATED:20240112T151925Z
DESCRIPTION:Topic: The Giroux Correspondence in Arbitrary Dimensions\n\nSpe
akers: Ko Honda\n\nAround twenty years ago Emmanuel Giroux formulated the
equivalence of\ncontact structures and open book decompositions with Weins
tein pages\nup to stabilization. We establish the Giroux correspondence in
full\ngenerality using the recent developments in convex hypersurface\nth
eory. This is joint work with Joe Breen and Yang Huang.
DTSTART:20240322T131500Z
DTEND:20240322T144500Z
LAST-MODIFIED:20240322T113507Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-143
END:VEVENT
BEGIN:VEVENT
UID:62636234-6561-4336-a531-636532303531
DTSTAMP:20240519T012345Z
CREATED:20240318T123608Z
DESCRIPTION:Topic: Understanding the cyclotron-line formation in accreting-
magnetic neutron stars via relativistic Monte Carlo radiative transfer sim
ulations.\n\nSpeakers: Nick Loudas\n\nAccretion-powered X-ray Pulsars (XRP
s) are strongly magnetized neutron\nstars (NSs)\, that accrete matter from
a donor companion star\, often\nexhibiting a cyclotron resonant scatterin
g feature (CRSF) in their\nX-ray spectra. Accretion onto their magnetic po
les is responsible for\nthe emergence of X-rays\, while the quantization o
f electrons motion\nperpendicular to the NS's magnetic field results in th
e emergence of\nabsorption/emission lines (i.e.\, CRSFs) via matter-radiat
ion resonant\nscattering. The CRSF encodes important information about the
magnetic\nfield in the line-forming region. Nevertheless\, the site of th
e CRSF\nformation is still an open puzzle. For low-/sub-critical luminosit
y\nsources\, the CRSF is believed to form above the magnetic pole's\nhotsp
ot\, while for the high-luminosity (L_X >~ 1e37 erg/s) ones\, two\nplaces
are suspect for the formation of a CRSF: the surface of the\nneutron star
and the radiative shock in the accretion column arising\nabove the magneti
c pole.\n\nIn this talk\, I'll give an overview of the proposed cyclotron-
line\nformation scenarios\, introduce the fundamental Physics involved\, a
nd\nbriefly discuss the observational signatures/correlations used to\ncon
strain the current viable models. Subsequently\, I'll focus on the\nhigh-l
uminosity sources in which the existence of a radiative shock in\nthe accr
etion column is feasible. I'll demonstrate that the observed\nproperties o
f CRSFs in these sources cannot be explained by the\nscenario where the si
te of the CRSF formation is the surface of the\nNS. Next\, I'll describe o
ur relativistic Monte Carlo Radiative\nTransfer (MCRT) code developed to s
tudy the spectral formation in the\nremaining candidate site of cyclotron-
line formation\, i.e.\, the\nradiative shock in the accretion column. I'll
present the derived\nemergent spectra\, show that a power law\, hard X-ra
y continuum\, and a\nprominent CRSF are naturally produced by the first-or
der Fermi\nenergization as the photons criss-cross the shock\, and thus pr
ovide\nconcrete evidence that the radiative shock is the site of CRSF\nfor
mation. Finally\, I'll conclude that the combination of bulk-\,\nthermal-C
omptonization\, and resonant Compton scattering of photons by\nelectrons i
n a radiative shock is efficient in producing spectra with\nprominent CRSF
s similar to the ones observed in high-luminosity XRPs.
DTSTART:20240322T163000Z
DTEND:20240322T173000Z
LAST-MODIFIED:20240318T123607Z
LOCATION:Dome Room\, Peyton Hall or Zoom
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-67
END:VEVENT
BEGIN:VEVENT
UID:38666530-6335-4563-b661-336566376137
DTSTAMP:20240519T012345Z
CREATED:20240318T124015Z
DESCRIPTION:Topic: 1. Sky-subtraction for the Subaru Prime Focus Spectrogra
ph (Jared Siegel) 2. Improving PFS through studying Airglow (Christian Kra
gh Jespersen)\n\nSpeakers: Jared Siegel (Princeton)\, Christian Kragh Jesp
ersen (Princeton)\n\nAbstract 1. The Subaru Prime Focus Spectrograph (PFS)
will soon be the\nfirst massively-multiplexed wide-field spectrograph on
a 8-meter class\ntelescope. PFS’s spectrograph system covers the optical t
o\nnear-infrared—380 to 1260nm—in a single exposure and is fed by\n2386 re
configurable fibers distributed across a 1.3-degree wide field\nof view. L
everaging deep multiband imaging catalogs\, particularly from\nSubaru’s Hy
per Suprime-Cam (HSC) imager\, PFS will fuel future\ndiscoveries in cosmol
ogy\, galaxy evolution\, and galactic archaeology.\nTo fully leverage Suba
ru’s 8.2 meter aperture and probe the faintest\ntargets\, accurate spectra
l reduction and sky subtraction are critical\nto PFS’s operation. In commi
ssioning of the PFS\, the accuracy of the\nsky subtraction algorithms is b
eing assessed through direct\nobservations of the night sky. Here\, we rep
ort the current status of\nthe sky-subtraction routines\, as determined fr
om the commissioning\ndata.\n\nAbstract 2. The PFS pipeline is fundamental
ly dependent on\nunderstanding the emission of both atoms and molecules in
the\natmosphere\, commonly grouped under the umbrella term of airglow. We
\nhave constructed a model for the airglow which has improved wavelength\n
calibration greatly. The model is based on observations made with\nSuNSS\,
an auxiliary telescope dedicated to understanding the airglow\,\nthe resu
lts from which I will also discuss.
DTSTART:20240322T180000Z
DTEND:20240322T190000Z
LAST-MODIFIED:20240318T124015Z
LOCATION:Zoom and Peyton 025
SUMMARY:Princeton University Survey Science Discussion
URL:https://www.ias.edu/sns/events/princeton-university-survey-science-disc
ussion-5
END:VEVENT
BEGIN:VEVENT
UID:63653131-6461-4338-b039-623139653737
DTSTAMP:20240519T012345Z
CREATED:20231207T143405Z
DESCRIPTION:Topic: Classification of Kink Clusters for Scalar Fields on the
Line\n\nSpeakers: Andy Lawrie\n\nI will present joint work with Jacek Jen
drej. We consider classical\nscalar fields in dimension 1+1 with a symmetr
ic double-well\nself-interaction potential. Examples of such equations are
the phi-4\nmodel and the sine-Gordon equation. These nonlinear wave equat
ions\nadmit non-trivial static solutions called kinks and antikinks\, whic
h\nare amongst the simplest examples of topological solitons. We define\na
n n-kink cluster to be a solution approaching\, for large positive\ntimes\
, a superposition of n alternating kinks and antikinks whose\nvelocities
converge to zero and mutual distances grow to infinity. Our\nmain result i
s a determination of the leading order asymptotic\nbehavior of any n-kink
cluster. This result is used to construct the\nsmooth n-dimensional invari
ant manifold of n-kink clusters. This\nanalysis is partially inspired by t
he notion of 'parabolic motions' in\nthe Newtonian n-body problem. We expl
ain this analogy and its\nlimitations. We also explain the role of kink cl
usters as universal\nprofiles for the formation/annihilation of multikink
configurations.
DTSTART:20240322T183000Z
DTEND:20240322T193000Z
LAST-MODIFIED:20240308T133640Z
LOCATION:Princeton University Fine Hall 314
SUMMARY:Joint IAS/PU Analysis Seminar
URL:https://www.ias.edu/math/events/joint-iaspu-analysis-seminar-5
END:VEVENT
BEGIN:VEVENT
UID:32363836-3361-4531-b661-626163326361
DTSTAMP:20240519T012345Z
CREATED:20240201T140955Z
DESCRIPTION:Topic: Analytic Adic Spaces and Descent\n\nSpeakers: Sean Howe
\n\nFor a general complete Huber pair $(A\,A^+)$\, define the analytic rin
g\n$(A\,A^+)_\blacksquare$. Prove that the associations $\mathrm{Spa}\,\n(
A\,A^+)\mapsto \mathcal{D}((A\,A^+)_\blacksquare)$\, $\mathrm{Spa}\,\n(A\,
A^+)\mapsto \mathcal{D}^\omega((A\,A^+)_\blacksquare)$\, and\n$\mathrm{Spa
}\, (A\,A^+)\mapsto\n\mathcal{D}^\mathrm{nuc}((A\,A^+)_\blacksquare)$ sati
sfy analytic\ndescent. Deduce from that the association $\mathrm{Spa}\,\n(
A\,A^+)\mapsto \mathrm{Perf}\, A$ satisfies analytic descent as well.
DTSTART:20240322T183000Z
DTEND:20240322T203000Z
LAST-MODIFIED:20240315T191309Z
LOCATION:Princeton University\, Fine Hall 214
SUMMARY:Condensed Learning Seminar
URL:https://www.ias.edu/math/events/condensed-learning-seminar-16
END:VEVENT
BEGIN:VEVENT
UID:36356539-3534-4261-a137-656539616631
DTSTAMP:20240519T012345Z
CREATED:20231207T143550Z
DESCRIPTION:Topic: Hilbert’s Sixth Problem for Nonlinear Waves\n\nSpeakers:
Zaher Hani\n\nHilbert’s sixth problem asks for a mathematically rigorous
\njustification of the macroscopic laws of statistical physics from the\nm
icroscopic laws of dynamics. The classical setting of this problem is\nthe
justification of Boltzmann’s kinetic equation from Newtonian\nparticle dy
namics. This justification has been proven for short times\,\nstarting wit
h the work of Lanford in 1975\, but its long time\njustification remains o
ne of the biggest open problems in kinetic\ntheory. \n\nIf classical colli
ding particles are replaced with interacting waves\,\none formally obtains
what is known as 'wave kinetic theory”\, which\nis sometimes also called
'wave turbulence theory'. This theory of\nstatistical physics for waves ha
s been developed\, starting in the late\n1920s\, for wave systems that ari
se in various scientific disciplines\nlike many-particle quantum physics\,
oceanography\, climate science\,\netc. The central mathematical problem t
here is also the justification\nof a kinetic equation\, known as the wave
kinetic equation\, starting\nfrom the Hamiltonian PDE that governs the cor
responding microscopic\nsystem. In this talk\, we shall describe the state
of the art of this\nproblem\, leading to a most recent joint work with Yu
Deng (USC)\, in\nwhich we give the first instance of a long time justific
ation of a\nnonlinear (particle or wave) collisional kinetic limit.
DTSTART:20240322T200000Z
DTEND:20240322T210000Z
LAST-MODIFIED:20240311T141109Z
LOCATION:Princeton University Fine Hall 314
SUMMARY:Joint IAS/PU Analysis Seminar
URL:https://www.ias.edu/math/events/joint-iaspu-analysis-seminar-6
END:VEVENT
BEGIN:VEVENT
UID:39643032-3565-4466-b234-366133323331
DTSTAMP:20240519T012345Z
CREATED:20240122T174721Z
DESCRIPTION: \nHISTORY OF SCIENCE LECTURE FEATURING DAVID KAISER\n_SECRET C
LOCKS: THE U.S. MILITARY\, EINSTEIN'S RELATIVITY\, AND THE\nGLOBAL POSITIO
NING SYSTEM _\nFRIDAY\, MARCH 22\, 2024\n5:30 P.M. | WOLFENSOHN HALL \n\nF
or nearly a decade\, beginning in the mid-1970s\, a debate unfolded\namong
physicists and engineers over how best to include effects from\nEinstein'
s general theory of relativity in the new military technology\nnow known a
s the Global Positioning System (GPS). Although some\nexchanges were publi
shed in the open scientiﬁc literature\, much of\nthe debate played out beh
ind the scenes\, in memos\, reports\, and\nspecial review sessions arrange
d by the U.S. military. Theoretical\nphysicists who had no relationship wi
th the project criticized\nearly efforts to incorporate relativistic effec
ts within GPS\ndesigns\, complaining that signiﬁcant information was not s
hared by\nmilitary contractors. Other experts in relativity\, who consulte
d more\nclosely with the U.S. Air Force while GPS was under\ndevelopment\,
responded that the outside critics had little relevant\nexperience with r
eal-world engineering applications\, and that\ntheir criticisms amounted t
o mathematical irrelevancies. Throughout\nthe debate\, few doubted that re
lativity—with its counterintuitive\nnotions of space and time—needed to be
taken seriously in the\ndesign and operation of GPS. Rather\, they disagr
eed over how best to\nincorporate deep lessons from relativity in an\nengi
neering-relevant way\, at a time when the stakes for the new\nmilitary tec
hnology loomed large.\n\nDAVID KAISER\nGermeshausen Professor of the Histo
ry of Science\, Program in Science\,\nTechnology\, and Society\, MIT\; and
Professor of Physics\, Department of\nPhysics\, MIT\n\nRegister below to
attend.
DTSTART:20240322T213000Z
DTEND:20240322T213000Z
LAST-MODIFIED:20240229T175230Z
LOCATION:Wolfensohn Hall
SUMMARY:History of Science Lecture
URL:https://www.ias.edu/events/history-science-lecture-1
END:VEVENT
BEGIN:VEVENT
UID:63306435-6261-4536-b233-643663306330
DTSTAMP:20240519T012345Z
CREATED:20240122T152332Z
DESCRIPTION:Topic: TBA\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.
DTSTART:20240325T150000Z
DTEND:20240325T160000Z
LAST-MODIFIED:20240122T152332Z
LOCATION:Zoom and Peyton Hall\, Grand Central
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-94
END:VEVENT
BEGIN:VEVENT
UID:66316232-6437-4464-b133-336235613434
DTSTAMP:20240519T012345Z
CREATED:20240122T151154Z
DESCRIPTION:Topic: TBA
DTSTART:20240325T160000Z
DTEND:20240325T170000Z
LAST-MODIFIED:20240122T151153Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-109
END:VEVENT
BEGIN:VEVENT
UID:33646531-3261-4938-b061-623130313361
DTSTAMP:20240519T012345Z
CREATED:20240112T155235Z
DESCRIPTION:Topic: New Algebraic Invariants of Legendrian Links\n\nSpeakers
: Lenhard Ng\n\nFor the past 25 years\, a key player in contact topology h
as been the\nFloer-theoretic invariant called Legendrian contact homology.
I'll\ndiscuss a package of new invariants for Legendrian knots and links
\nthat builds on Legendrian contact homology and is derived from\nrational
symplectic field theory. This includes a Poisson bracket on\nLegendrian c
ontact homology and a symplectic structure on augmentation\nvarieties. Tim
e permitting\, I'll also describe an unexpected\nconnection to cluster the
ory for a family of Legendrian links\nassociated to positive braids. Parts
of this are joint work in\nprogress with Roger Casals\, Honghao Gao\, Lin
hui Shen\, and Daping Weng.
DTSTART:20240325T163000Z
DTEND:20240325T174500Z
LAST-MODIFIED:20240325T114141Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Symplectic Geometry Seminar
URL:https://www.ias.edu/math/events/symplectic-geometry-seminar-15
END:VEVENT
BEGIN:VEVENT
UID:38353765-3566-4735-b533-316264636532
DTSTAMP:20240519T012345Z
CREATED:20231204T184255Z
DESCRIPTION:Topic: Fourier Uniformity of Multiplicative Functions\n\nSpeake
rs: Miguel Walsh\n\nThe Fourier uniformity conjecture seeks to understand
what\nmultiplicative functions can have large Fourier coefficients on many
\nshort intervals. We will discuss recent progress on this problem and\nex
plain its connection with the distribution of prime numbers and with\nothe
r central problems about the behavior of multiplicative functions\,\nsuch
as the Chowla and Sarnak conjectures.
DTSTART:20240325T180000Z
DTEND:20240325T190000Z
LAST-MODIFIED:20240325T184520Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Members' Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-63
END:VEVENT
BEGIN:VEVENT
UID:63653062-6261-4361-a335-356136646261
DTSTAMP:20240519T012345Z
CREATED:20240321T172710Z
DESCRIPTION:Topic: On Artin--Grothendieck Vanishing in Rigid-Analytic Situa
tions\n\nSpeakers: Ofer Gabber
DTSTART:20240325T193000Z
DTEND:20240325T203000Z
LAST-MODIFIED:20240326T140912Z
LOCATION:Fine 322\, Princeton University
SUMMARY:Joint IAS/Princeton Arithmetic Geometry Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-arithmetic-geometry-
seminar-18
END:VEVENT
BEGIN:VEVENT
UID:34393138-6532-4837-a266-623964356335
DTSTAMP:20240519T012345Z
CREATED:20240122T154400Z
DESCRIPTION:The Bahcall Lunch follows the astrophysics colloquium lecture.
DTSTART:20240326T163000Z
DTEND:20240326T173000Z
LAST-MODIFIED:20240122T154359Z
LOCATION:Lewis Library\, Princeton University
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-67
END:VEVENT
BEGIN:VEVENT
UID:64336665-3736-4233-a566-373431393434
DTSTAMP:20240519T012345Z
CREATED:20240122T161407Z
DESCRIPTION:Topic: TBA
DTSTART:20240326T180000Z
DTEND:20240326T190000Z
LAST-MODIFIED:20240122T161407Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Princeton University Computational Astrophysics Club
URL:https://www.ias.edu/sns/events/princeton-university-computational-astro
physics-club-32
END:VEVENT
BEGIN:VEVENT
UID:31383230-3934-4430-a661-623930396536
DTSTAMP:20240519T012345Z
CREATED:20240322T184356Z
DESCRIPTION:Topic: On Endomorphisms of THH\n\nSpeakers: Maxime Ramzi\n\nTop
ological Hochschild homology is an important invariant\, closely\nrelated
to algebraic K-theory\, and can be seen as a noncommutative\nanalogue of d
e Rham chains.\n\nIn this talk\, I will describe various computations of t
he ring/monoid\nof endomorphisms of THH in different variants\, with an ap
proach based\non a generalized version of the Dundas-McCarthy theorem.
DTSTART:20240327T180000Z
DTEND:20240327T190000Z
LAST-MODIFIED:20240506T120906Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Seminar
URL:https://www.ias.edu/math/events/special-year-seminar-17
END:VEVENT
BEGIN:VEVENT
UID:37303663-3263-4734-a330-623466373436
DTSTAMP:20240519T012345Z
CREATED:20240112T153859Z
DESCRIPTION:Topic: Matrix Rigidity\n\nSpeakers: Zeev Dvir\n\nA matrix M is
RIGID if one needs to change it in many places in order\nto reduce its ran
k significantly. While a random matrix M (say over a\nfinite field) is rig
id with high probability\, coming up with explicit\nconstructions of such
matrices is still mostly open (and would have\napplications in computation
al complexity). I will survey some of the\nknown results (mostly negative
ones)\, in particular showing that\nmatrices with an abelian symmetry grou
p are non rigid.
DTSTART:20240327T220000Z
DTEND:20240328T000000Z
LAST-MODIFIED:20240403T154408Z
LOCATION:Dilworth Room
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-274
END:VEVENT
BEGIN:VEVENT
UID:64396137-6231-4339-b838-363763326165
DTSTAMP:20240519T012345Z
CREATED:20240130T153616Z
DESCRIPTION:Topic: Universal Locally Acyclic Sheaves\n\nSpeakers: Longke Ta
ng
DTSTART:20240328T140000Z
DTEND:20240328T160000Z
LAST-MODIFIED:20240506T120837Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Learning Seminar
URL:https://www.ias.edu/math/events/special-year-learning-seminar-31
END:VEVENT
BEGIN:VEVENT
UID:30633336-3362-4166-b636-363539623763
DTSTAMP:20240519T012345Z
CREATED:20240122T164356Z
DESCRIPTION:Topic: Astrophysical Lessons from LIGO-Virgo-KAGRA's Black Hol
es\n\nSpeakers: Maya Fishbach\n\nThe LIGO-Virgo-KAGRA detector network has
observed over 70\ngravitational-wave sources to date\, including mergers
between black\nholes\, neutron stars\, and mixed neutron star-black holes.
Focusing on\nthe black hole mergers\, I will describe some recent lessons
into how\,\nwhen\, and where black holes are made. These questions are co
nnected to\nseveral astrophysical puzzles\, including the deaths of massiv
e stars\,\nthe growth of black holes across cosmic time\, high-redshift st
ar\nformation\, and properties of globular clusters.
DTSTART:20240328T150000Z
DTEND:20240328T160000Z
LAST-MODIFIED:20240326T122248Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-85
END:VEVENT
BEGIN:VEVENT
UID:39313034-3639-4062-b431-623263323230
DTSTAMP:20240519T012345Z
CREATED:20240207T190844Z
DESCRIPTION:Topic: What is a p-adic Modular Form?\n\nSpeakers: Rebecca Bell
ovin
DTSTART:20240328T170000Z
DTEND:20240328T180000Z
LAST-MODIFIED:20240403T154434Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-24
END:VEVENT
BEGIN:VEVENT
UID:36386562-3861-4339-b061-616331623731
DTSTAMP:20240519T012345Z
CREATED:20240326T121720Z
DESCRIPTION:Topic: On the Likely Prevalence of Ocean-Worlds in M-Dwarf Syst
ems\n\nSpeakers: Lujendra Ojha (Rutgers University)\n\nThe habitability po
tential of planets in the circumstellar habitable\nzone (CHZ) of M-dwarf s
tars are of great interest because M-dwarf\nstars make up 75% of the popul
ation of stars in the galaxy\, and >40%\nof M-dwarfs stars are expected to
harbor exo-Earths in their CHZ.\nHowever\, key differences between the st
ellar and planetary\nenvironments between M-dwarf stars and the more lumin
ous Sun-like\nstars have led to a long-standing debate around the habitabi
lity of\nM-dwarf orbiting exo-Earths. Even if the harsh effects of the M-d
warf\nstellar environment were absent\, a significant fraction of the M-dw
arf\norbiting exo-Earths would still require substantial greenhouse warmin
g\nfor liquid water to be stable on the surface\, given their relatively\n
low equilibrium temperature. Another notable\, common feature of these\npl
anets is tidal locking\, possibly leading to an eyeball-like climate\nstat
e\, where most of the planet is frozen\, with the exception of the\nsubste
llar point\, where liquid water may exist. In such cold\, icy\,\nrocky pla
nets\, basal melting may provide an alternative means of\nforming liquid w
ater in a subsurface environment shielded from\nhigh-energy radiation. Bas
al melting is responsible for the formation\nof subglacial liquid water la
kes in various areas of Earth.\nSimilarly\, basal melting of thick ice dep
osits during the Noachian era\n[>4 Ga] has been proposed as a potential so
lution to reconciling\nfluvial feature generation with the faint young sun
paradox on Mars.\nAs such\, basal melting may play an equally important r
ole in the\nhabitability of cold\, icy exo-Earths. In this work\, we demon
strate\nthat basal melting is likely prevalent on M-dwarf orbiting exo-Ear
ths\,\neven with modest\, Moon-like geothermal heat flow and that subglaci
al\noceans may persist on exo-Earths for a prolonged period. Our findings
\nsuggest that exo-Earths resembling the icy moons of Jupiter and Saturn\n
may be common in the Milky-way galaxy.
DTSTART:20240328T180000Z
DTEND:20240328T190000Z
LAST-MODIFIED:20240326T122004Z
LOCATION:Serin Hall Rm W330\, Rutgers and Zoom
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
38
END:VEVENT
BEGIN:VEVENT
UID:39333839-6362-4432-b938-326166613461
DTSTAMP:20240519T012345Z
CREATED:20231204T181735Z
DESCRIPTION:Topic: Kashiwara Crystals in Endoscopy\n\nSpeakers: Griffin Wan
g\n\nIn my recent work on a geometric proof of the endoscopic fundamental
\nlemma for spherical Hecke algebras\, there are many new features not\npr
esent in its Lie algebra analogue originally proved by B.C.~Ng\^o.\nOne of
such new features is an asymptotic version of the fundamental\nlemma\, fo
rmulated using the theory of Kashiwara crystals. It is at its\ncore a pure
ly combinatorial version of the original fundamental lemma\nand implies th
e latter when combined with results about multiplicative\nHitchin fibratio
ns. I will explain what the asymptotic fundamental\nlemma is and why it ma
y be promising to study in a broader context\nlike functoriality. The talk
is meant to be made accessible.
DTSTART:20240328T203000Z
DTEND:20240328T213000Z
LAST-MODIFIED:20240322T141358Z
LOCATION:*Princeton University\, Fine 214*
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-19
END:VEVENT
BEGIN:VEVENT
UID:63323730-3461-4264-a534-653037363033
DTSTAMP:20240519T012345Z
CREATED:20240112T151943Z
DESCRIPTION:Topic: Three 20 Minute Research Talks \n\nSpeakers: Yao Xiao\,
Yoav Zimhony\, Qi Feng\n\n *\nYAO XIAO : _Equivariant Lagrangian Floer Theo
ry on Compact Toric\nManifolds_\n\nWe introduce an equivariant Lagrangian
Floer theory on compact\nsymplectic toric manifolds. We define a spectral
sequence to compute\nthe equivariant Floer cohomology. We show that the se
t of pairs\n$(L\,b)$\, each consisting of a Lagrangian torus fiber and a w
eak\nbounding cochain\, that have non-zero equivariant Lagrangian Floer\nc
ohomology forms a rigid analytic space (over the non-Archimedean\nNovikov
field). We prove that the dimension of such a rigid analytic\nspace is equ
al to that of the acting group in certain cases. We will\ndiscuss some exa
mples.\n\n \n\n *\nYOAV ZIMHONY : _Commutative Control Data for Smoothly Lo
cally Trivial\nStratified Spaces_\n\nFor a compact Lie group G and a Hamil
tonian G-space M\, can we find a\nsmooth weak deformation retraction from
a neighbourhood of the zero\nlevel set of the momentum map onto it? If we
do not require smoothness\nthen this is already known\, in fact one can ob
tain a strong\ndeformation retraction. We will outline the construction of
such\nsmooth weak deformation retraction with the following steps.\nFirst
we show that the zero level set\, stratified by orbit types\,\nsatisfies
a condition stronger than Whitney (B) regularity - smooth\nlocal trivialit
y with conical fibers. Using this local condition we\nconstruct control da
ta in the sense of Mather with the additional\nproperties that the fiber-w
ise multiplications by scalars\, coming from\nthe tubular neighbourhood st
ructures\, preserve strata and commute with\neach other. Finally we use th
is control data to obtain the\nneighbourhood smooth weak deformation retra
ction.\nWe will also discuss a key technical tool used in the construction
of\nthe control data - Euler-like vector fields.\n\n \n\n *\nQI FENG : _Sy
mplectic Squeezing of Domains in $T^*T^n$_\n\nThe symplectic squeezings in
the cotangent bundle of a torus is\ndistinct from those in $R^{2n}$\, due
to the nontrivial topology of the\ntorus. In this talk\, we will show tha
t for $n\ge2$ any bounded domain\nof $T^*T^n$ can be symplectically embedd
ed into a trivial subbundle\nwith an irrational cylinder fiber. These symp
lectic embeddings are\nconstructed based on Arnold's cat map\, Dirichlet's
approximation\ntheorem\, and Bézout’s identity. Our result resolves an op
en problem\nposted by Gong-Xue (stated in $n=2$) and also generalizes it t
o higher\ndimensional situations. This talk is based on joint work with Ju
n\nZhang\n
DTSTART:20240329T131500Z
DTEND:20240329T144500Z
LAST-MODIFIED:20240315T135549Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-144
END:VEVENT
BEGIN:VEVENT
UID:66663534-6162-4933-b766-386130383532
DTSTAMP:20240519T012345Z
CREATED:20240122T152351Z
DESCRIPTION:Topic: Explaining the differences in massive star models from v
arious simulations\n\nSpeakers: Dorottya Szécsi\n\nEach week\, we hold a r
elatively informal seminar/discussion series\nwith an emphasis on extra-ga
lactic 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 greater\ndetail than may be explained within the
text of the article. To aid\nwith discussion\, only the article PDF is pre
sented -- no\npowerpoint-style slides. Galread discussions are very friend
ly and\ninteractive.
DTSTART:20240401T150000Z
DTEND:20240401T160000Z
LAST-MODIFIED:20240401T124921Z
LOCATION:Zoom and Peyton Hall\, Grand Central
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-93
END:VEVENT
BEGIN:VEVENT
UID:62386465-3263-4530-a537-383962663330
DTSTAMP:20240519T012345Z
CREATED:20240109T185048Z
DESCRIPTION:Topic: Tight Cell-Probe Lower Bounds for Dynamic Succinct Dicti
onaries\n\nSpeakers: Huacheng Yu\n\nA dictionary data structure maintains
a set of at most $n$ keys from\nthe universe $[U]$ under key insertions an
d deletions\, such that given\na query $x\in[U]$\, it returns if $x$ is in
the set. Some variants also\nstore values associated to the keys such tha
t given a query $x$\, the\nvalue associated to $x$ is returned when $x$ is
in the set.\n\nThis fundamental data structure problem has been studied f
or six\ndecades since the introduction of hash tables in 1953. A hash tabl
e\noccupies $O(n\log U)$ bits of space with constant time per operation\ni
n expectation. There has been a vast literature on improving its time\nand
space usage. The state-of-the-art dictionary by Bender\,\nFarach-Colton\,
Kuszmaul\, Kuszmaul and Liu has space consumption close\nto the informati
on-theoretic optimum\, using a total of\n\[\log\binom{U}{n}+O(n\log^{(k)}
n)\]\nbits\, while supporting all operations in $O(k)$ time\, for any\npar
ameter $k\leq \log^* n$. The term $O(\log^{(k)}\nn)=O(\underbrace{\log\cdo
ts\log}_k n)$ is referred to as the _wasted\nbits per key_.\n\nIn this tal
k\, we show a matching cell-probe lower bound: For\n$U=n^{1+\Theta(1)}$\,
any dictionary with $O(\log^{(k)} n)$ wasted bits\nper key must have expec
ted operational time $\Omega(k)$\, in the\ncell-probe model with word-size
$w=\Theta(\log U)$. Furthermore\, if a\ndictionary stores values of $\The
ta(\log U)$ bits\, we show that\nregardless of the query time\, it must ha
ve $\Omega(k)$ expected update\ntime. It is worth noting that this is the
first cell-probe lower bound\non the trade-off between space and update ti
me for general data\nstructures.\n\nJoint work with Tianxiao Li\, Jingxun
Liang and Renfei Zhou.
DTSTART:20240401T150000Z
DTEND:20240401T160000Z
LAST-MODIFIED:20240502T192138Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-568
END:VEVENT
BEGIN:VEVENT
UID:33616531-3335-4464-a131-393131396230
DTSTAMP:20240519T012345Z
CREATED:20240122T151218Z
DESCRIPTION:Topic: Origins of mean-motion resonances in the Solar System an
d beyond.\n\nSpeakers: Max Goldberg\n\nPlanets and satellites in mean-moti
on resonance offer a unique\nopportunity to probe complex effects of plane
t-disk interaction and\ntidal dissipation. I will first discuss how the or
bit of Hyperion\, a\nsmall satellite of Saturn\, is inextricably coupled t
o its chaotic\nspin. By balancing the contributions from Titan and Hyperio
n's\ninternal dissipation\, tidal parameters can be measured and fine-tuni
ng\nproblems are avoided. I will then show that similar techniques can\nco
nstrain the origin of the near-resonant Kepler exoplanets. Transit\ntiming
variations contain a wealth of information on the resonant\ndynamics that
is usually ignored. I will show that the resonances are\noverly excited\,
and thus require a source of stochasticity in addition\nto disk-driven mi
gration in order to match their current orbits.
DTSTART:20240401T160000Z
DTEND:20240401T170000Z
LAST-MODIFIED:20240401T124816Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-110
END:VEVENT
BEGIN:VEVENT
UID:33343635-3065-4364-a666-333564636538
DTSTAMP:20240519T012345Z
CREATED:20240329T123904Z
DESCRIPTION:Topic: Simulating Our Universe. How and Why?\n\nSpeakers: Elena
Hernandez\n\nWe will present SLOW\, the simulated cosmic volume (500 Mpc/
h) that\nfeatures the most extensive collection of Local Universe Galaxy\n
Clusters ever replicated\, accurately set within the appropriate\nlarge-sc
ale framework. We will show current predictions about these\nstructures ba
sed on our simulated results and compare them with\nobservational data. Ad
ditionally\, the discussion will cover how these\nsimulations open new ave
nues for research in galaxy cluster and\ncosmology studies.
DTSTART:20240401T163000Z
DTEND:20240401T180000Z
LAST-MODIFIED:20240329T124346Z
LOCATION:IAS\, West Seminar Room
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-77
END:VEVENT
BEGIN:VEVENT
UID:31376238-3966-4331-b063-306665666666
DTSTAMP:20240519T012345Z
CREATED:20231204T184313Z
DESCRIPTION:Topic: On a Theorem of Furstenberg\n\nSpeakers: Alex Eskin\n\nA
deep result of Furstenberg from 1967 states that if $\Gamma$ is a\nlattic
e in a semisimple Lie group $G$\, then there exists a measure\non $\Gamma$
with finite first moment such that the corresponding\nharmonic measure on
the Furstenberg boundary of $G$ is absolutely\ncontinuous. I will discuss
some of the history of this result and some\nrecent generalizations.
DTSTART:20240401T180000Z
DTEND:20240401T190000Z
LAST-MODIFIED:20240401T131919Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Members' Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-64
END:VEVENT
BEGIN:VEVENT
UID:35616333-3965-4732-b537-316234383734
DTSTAMP:20240519T012345Z
CREATED:20231206T180704Z
DESCRIPTION:Topic: On De Rham Flip-Flopping in Dual Towers\n\nSpeakers: Wie
slawa Niziol\n\nWe will discuss de Rham and Hyodo-Kato flip-flopping for d
ual towers\nof rigid analytic spaces. The main tools are comparison theore
ms\nexpressing the two cohomologies as pro-étale cohomologies of\ncorrespo
nding relative period sheaves that\, by definition\, satisfy\npro-étale de
scent. As an application\, we show that de Rham and\nHyodo-Kato cohomologi
es of the finite level coverings of the Drinfeld\nspace of any dimension d
are admissible as representations of\nGL_{d+1}(K). \n\nThis is a joint wo
rk with Gudio Bosco and Gabriel Dospinescu.
DTSTART:20240401T193000Z
DTEND:20240401T203000Z
LAST-MODIFIED:20240506T183429Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Joint IAS/Princeton Arithmetic Geometry Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-arithmetic-geometry-
seminar-21
END:VEVENT
BEGIN:VEVENT
UID:35366533-3961-4432-a163-353634363762
DTSTAMP:20240519T012345Z
CREATED:20240207T162308Z
DESCRIPTION:Topic: New Derandomized Agreement Testers\n\nSpeakers: Yotam Di
kstein\n\nAgreement testing (aka direct product testing)\, checks if consi
stent\nlocal information reveals global structure. Beyond its theoretical
\nconnections to probabilistic checkable proofs (PCPs)\, constructing\nagr
eement testers is a fundamental combinatorial question that has\nexciting
applications in coding theory and hardness amplification.\n\nLet (V\,S) be
a hypergraph with vertices. The direct product encoding\nencodes a functi
on $g:V \to \{0\,1\}$ by its restrictions $F(g)=\{g|_s:\ns\in S\}$. Agreem
ent testing asks the inverse question: Given\n$F=\{f_s:s \to \{0\,1\}: s \
in S\}$\, can we test whether $F$ is\nnon-trivially close to an encoding o
f some $g:V \to \{0\,1\}$\, by\nquerying only two random functions? The te
st we consider samples two\nrandom $s\,s' \in S$ and accepts if $f_s = f_{
s'}$ on the shared\nintersection. In this talk we focus on the more challe
nging 1%-regime\,\nwhere the probability that $F$ passes the test is non-n
egligible\, but\nsmall (1%). Hypergraphs where passing the test with non-n
egligible\nprobabiliy implies correlation with some $F(g)$\, are called so
und\nagreement tests.\n\nConstructing sound agreement tests was studied in
the 90'\, and works\nin complexity inspired the goal of constructing agre
ement tests where\nthe size of $S$ grows as slowly as possible with respec
t to $V$. Such\nsparse tests are an important prerequisite for derandomizi
ng some\nfundamental PCP constructions.\n\nIn this work we construct novel
agreement tests for the 1%-regime\,\nwhere $|S|=O(|V|)$. Quite surprising
ly\, constructing such tests\nrequires the hypergraph to have no small con
nected topological covers\,\nalong with other more combinatorial propertie
s. We construct such\nhypergraphs using subgroups of the symplectic group
over the piadic\nnumbers\, along with a variety of other topological and c
ombinatorial\ntools from high dimensional expander theory.\n\nThis talk is
based on joint work with Irit Dinur and Alex Lubotzky.\n\n
DTSTART:20240402T143000Z
DTEND:20240402T163000Z
LAST-MODIFIED:20240502T192111Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-561
END:VEVENT
BEGIN:VEVENT
UID:34653164-3865-4763-a633-356333656239
DTSTAMP:20240519T012345Z
CREATED:20240122T154426Z
DESCRIPTION:The Bahcall Lunch follows the astrophysics colloquium lecture.
DTSTART:20240402T163000Z
DTEND:20240402T173000Z
LAST-MODIFIED:20240122T154426Z
LOCATION:Lewis Library\, Princeton University
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-68
END:VEVENT
BEGIN:VEVENT
UID:36643636-6433-4034-b835-343133373764
DTSTAMP:20240519T012345Z
CREATED:20240201T141121Z
DESCRIPTION:Topic: Six Functors\n\nSpeakers: Juan Esteban Rodriguez Camargo
\n\nDefine the category of solid quasi-coherent sheaves\n$\mathcal{D}_\bla
cksquare(X)$ on a rigid-analytic varity $X$. Show\nthat this assignment co
mes with a natural $6$-functor formalism.\nFinally\, prove the Grothendiec
k--Serre duality in the rigid-analytic\ncontext.
DTSTART:20240402T180000Z
DTEND:20240402T200000Z
LAST-MODIFIED:20240402T172433Z
LOCATION:Simonyi Hall 101
SUMMARY:Condensed Learning Seminar
URL:https://www.ias.edu/math/events/condensed-learning-seminar-17
END:VEVENT
BEGIN:VEVENT
UID:32323438-3134-4339-a134-393732323238
DTSTAMP:20240519T012345Z
CREATED:20240122T161425Z
DESCRIPTION:Topic: Journal Club
DTSTART:20240402T200000Z
DTEND:20240402T210000Z
LAST-MODIFIED:20240329T125753Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Princeton University Computational Astrophysics Club
URL:https://www.ias.edu/sns/events/princeton-university-computational-astro
physics-club-31
END:VEVENT
BEGIN:VEVENT
UID:65303333-3864-4535-a662-613036333731
DTSTAMP:20240519T012345Z
CREATED:20240125T145948Z
DESCRIPTION:Topic: The $v$-Picard Group of Stein Spaces\n\nSpeakers: Sally
Gilles\n\nIn this talk\, I will present a computation of the image of the
\nHodge-Tate logarithm map (defined by Heuer) in the case of smooth\nStein
varieties. When the variety is the affine space\, Heuer has\nproved that
this image is equal to the group of closed differential\nforms. In general
\, we will see that the image always contains such\nforms but the quotient
can be non-trivial: it contains a $Zp$-module\nthat maps\, via the Bloch-
Kato exponential map\, to integral classes in\nthe proétale cohomology. Th
is is based on a joint work with V. Ertl\nand W. Niziol.
DTSTART:20240403T180000Z
DTEND:20240403T190000Z
LAST-MODIFIED:20240506T120807Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Seminar
URL:https://www.ias.edu/math/events/special-year-seminar-13
END:VEVENT
BEGIN:VEVENT
UID:66623932-3837-4939-b434-376139393034
DTSTAMP:20240519T012345Z
CREATED:20240311T175423Z
DESCRIPTION:Topic: Directional Statistics of Lattice Points and Escape of M
ass for Embedded Horospheres\n\nSpeakers: Jens Marklof\n\nI will discuss e
scape of mass estimates for SL(d\,ℝ)-horospheres\nembedded in the space of
affine lattices\, which depend on the\nDiophantine properties of the shor
test affine lattice vector. These\nestimates can be used\, in conjunction
with Ratner's theorem\, to prove\nthe convergence of moments in natural la
ttice point problems\,\nincluding the statistics of directions in lattices
\, inhomogeneous\nFarey factions\, and the distribution of smallest denomi
nators. \n\nBased on joint work with Wooyeon Kim (ETH).
DTSTART:20240403T203000Z
DTEND:20240403T213000Z
LAST-MODIFIED:20240403T194343Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Special Homogeneous Dynamics Seminar
URL:https://www.ias.edu/math/events/special-homogeneous-dynamics-seminar
END:VEVENT
BEGIN:VEVENT
UID:61333633-3535-4134-b261-613534313037
DTSTAMP:20240519T012345Z
CREATED:20240112T153924Z
DESCRIPTION:Topic: Cubic Forms: Geometry vs. Arithmetic\n\nSpeakers: Ulrich
Derenthal\n\nCubic forms are homogeneous polynomials of degree 3 in sever
al \nvariables. Number theory is interested in their zeros over the\nratio
nal \nnumbers. Algebraic geometry studies the cubic hypersurfaces defined
\nby \nthem (e.g.\, the 27 lines on smooth cubic surfaces over the complex
\nnumbers). How is the arithmetic of cubic hypersurfaces (expected to\nbe
) \ngoverned to their geometry? I will discuss old and new conjectures and
\nresults.
DTSTART:20240403T220000Z
DTEND:20240404T000000Z
LAST-MODIFIED:20240329T181701Z
LOCATION:Dilworth Room
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-275
END:VEVENT
BEGIN:VEVENT
UID:31326466-6461-4433-a462-323432323537
DTSTAMP:20240519T012345Z
CREATED:20240130T145648Z
DESCRIPTION:Topic: The (Non-)Semistable Locus of Bun$_G$\n\nSpeakers: Juan
Esteban Rodriguez Camargo
DTSTART:20240404T140000Z
DTEND:20240404T160000Z
LAST-MODIFIED:20240506T120736Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Learning Seminar
URL:https://www.ias.edu/math/events/special-year-learning-seminar-30
END:VEVENT
BEGIN:VEVENT
UID:35653237-3830-4233-a635-633736376165
DTSTAMP:20240519T012345Z
CREATED:20240122T164901Z
DESCRIPTION:Topic: A Fresh Look at Galaxy Scaling Relations and What They R
eveal about Galaxy Formation\n\nSpeakers: Mike Fall\n\nDespite the apparen
t complexity of galaxies\, some of their most basic\nproperties (mass M\,
binding energy E\, angular momentum J\, etc) obey\nsimple power-law scalin
g relations. Such relations provide some of the\nclearest insights into ga
laxy formation. This talk focuses on the\nrelations between circular veloc
ity V (a proxy for specific energy\, e\n= E / M ~ V^2) and mass M and betw
een specific angular momentum j = J\n/ M and M. The observed forms of thes
e scaling relations for the\nstellar components of galaxies\, Ms ~ Vs^4 an
d js ~ Ms^0.6\, are closely\nlinked to the corresponding relations for the
ir dark halos in CDM-type\ncosmologies\, Mh ~ Vh^3 and jh ~ Mh^(2/3). We h
ave obtained new\nkinematic (H_alpha and HI) and photometric data that ext
end the\nrelations for late-type galaxies (spirals and irregulars) over th
e\nfull range of stellar masses: Ms ~ 10^8 to 10^12 Msun. From the same\nd
ata\, we derive the “retention factors” for mass fM = Ms / Mh (aka\nstella
r-to-halo mass ratio\, SHMR) and specific angular momentum fj =\njs / jh\,
finding fM ~ Ms^0.4 and fj ~ 1 independent of Ms. In\ncontrast\, for the
most massive early-type galaxies (ellipticals and\nlenticulars)\, fM decli
nes with Ms and fj << 1. We draw some simple but\nimportant conclusions fr
om these empirical results about the physical\norigins of several basic pr
operties of galaxies\, including their\nsizes\, compositions (stars vs gas
)\, morphologies (disk vs spheroid)\,\nand feedback drivers (stars vs AGN)
. We also show that the observed\nforms of fM and fj are reproduced in con
temporary cosmological\nhydrodynamical simulations of galaxy formation (Il
lustrisTNG).
DTSTART:20240404T150000Z
DTEND:20240404T160000Z
LAST-MODIFIED:20240312T153604Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-94
END:VEVENT
BEGIN:VEVENT
UID:64633763-3832-4430-a338-373161396463
DTSTAMP:20240519T012345Z
CREATED:20240207T191108Z
DESCRIPTION:Topic: What is Bakry-Émery Curvature?\n\nSpeakers: Mira Gordin
DTSTART:20240404T170000Z
DTEND:20240404T180000Z
LAST-MODIFIED:20240403T154522Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-25
END:VEVENT
BEGIN:VEVENT
UID:30366362-3763-4061-a462-323161313464
DTSTAMP:20240519T012345Z
CREATED:20231204T165318Z
DESCRIPTION:Topic: The Not-So-Local-Global Conjecture\n\nSpeakers: James Ri
ckards\n\nI will introduce Apollonian circle packings\, and describe the\n
local-global conjecture\, which predicts the set of curvatures of\ncircles
occurring in a packing. I will then describe reciprocity\nobstructions\,
a phenomenon rooted in reciprocity laws (for instance\,\nquadratic recipro
city)\, that disproves the conjecture in most cases. I\nwill also describe
follow-up work\, where we obtain a similar result in\na situation related
to Zaremba's conjecture on continued fraction\nexpansions\, disproving a
conjecture of Kontorovich.
DTSTART:20240404T203000Z
DTEND:20240404T213000Z
LAST-MODIFIED:20240404T180237Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-16
END:VEVENT
BEGIN:VEVENT
UID:33343365-3366-4431-b738-646361363237
DTSTAMP:20240519T012345Z
CREATED:20240329T132611Z
DESCRIPTION:Topic: Impact of Blending on 3x2pt. \n\nSpeakers: Erfan Nourbak
hsh
DTSTART:20240405T180000Z
DTEND:20240405T190000Z
LAST-MODIFIED:20240329T132823Z
LOCATION:Zoom and Peyton 025 or Broadmead 102
SUMMARY:Princeton University Survey Science Discussion
URL:https://www.ias.edu/sns/events/princeton-university-survey-science-disc
ussion-6
END:VEVENT
BEGIN:VEVENT
UID:31356539-3934-4232-a563-633266626239
DTSTAMP:20240519T012345Z
CREATED:20231207T143310Z
DESCRIPTION:Topic: Generic Properties of Laplace Eigenfunctions in the Pres
ence of Symmetry\n\nSpeakers: Craig Sutton\n\nLet $G$ be a compact Lie gro
up acting on a closed manifold $M$.\nPartially motivated by work of Uhlenb
eck (1976)\, we explore the\ngeneric properties of Laplace eigenfunctions
associated to\n$G$-invariant metrics on $M$. We find that\, in the case wh
ere\n$\mathbb{T}$ is a torus acting freely on $M$\, the Laplace eigenspace
s\nassociated to a generic $\mathbb{T}$-invariant metric are irreducible\n
representations of $\mathbb{T}$. This provides a mathematically\nrigorous
instance of the belief in quantum mechanics that\, in the\npresence of sym
metry\, non-irreducible eigenspaces are 'accidental\ndegeneracies.’’ We al
so observe that the nodal set of a Laplace\neigenfunction associated to a
generic $\mathbb{T}$-invariant metric is\nan embedded hypersurface. In par
ticular\, under suitable conditions\,\nour framework allows us to provide
numerous examples of Riemannian\nmanifolds with $S^{1}$-invariant metrics
for which the nodal set of\nany eigenfunction that is equivariant\, yet no
n-invariant is connected\nand divides the manifold into precisely two noda
l domains. Such\neigenfunctions form a subspace of Weyl density one in $L^
{2}(M)$.\n\nThis is joint work with Donato Cianci (GEICO)\, Chris Judge (I
ndiana)\nand Samuel Lin (Oklahoma).
DTSTART:20240405T183000Z
DTEND:20240405T193000Z
LAST-MODIFIED:20240506T183516Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Analysis and Mathematical Physics
URL:https://www.ias.edu/math/events/analysis-and-mathematical-physics-27
END:VEVENT
BEGIN:VEVENT
UID:38303861-3161-4036-b535-336330306563
DTSTAMP:20240519T012345Z
CREATED:20240201T141415Z
DESCRIPTION:Topic: Nuc(X) is Dualizable\n\nSpeakers: Emanuel Reinecke\n\nPr
ove that for a qcqs analytic adic space $X$\, the category of nuclear\nshe
aves on $X$ is dualizable in two steps. First\, establish the result\nloca
lly over affinoid Tate adic spaces using the notion of weak\nproregularity
and then prove a general result concerning gluing of\ndualizable categori
es. Define (continuous) $K$-theory of adic\nspaces.
DTSTART:20240405T183000Z
DTEND:20240405T203000Z
LAST-MODIFIED:20240201T141415Z
LOCATION:Princeton University\, Fine Hall 314
SUMMARY:Condensed Learning Seminar
URL:https://www.ias.edu/math/events/condensed-learning-seminar-18
END:VEVENT
BEGIN:VEVENT
UID:63353466-3563-4330-b737-373138303438
DTSTAMP:20240519T012345Z
CREATED:20240321T124505Z
DESCRIPTION:Topic: Expansion\, Divisibility and Parity\n\nSpeakers: Harald
Helfgott\n\nWe will discuss a graph that encodes the divisibility properti
es of\nintegers by primes. We will prove that this graph has a strong loca
l\nexpander property almost everywhere. We then obtain several\nconsequenc
es in number theory\, beyond the\ntraditional parity barrier\, by combinin
g the main result with\nMatomaki-Radziwill. (This is joint work with M. Ra
dziwill.) For\ninstance: for lambda the Liouville function (that is\, the
completely\nmultiplicative function with $lambda(p) = -1$ for every prime)
\,\n$(1/\log x) \sum_{n\leq x} lambda(n) \lambda(n+1)/n = O($1/sqrt{log\nl
og x)}$)$\, which is stronger than well-known results by Tao and\nTao-Tera
vainen. We also manage to prove\, for example\, that\n$lambda(n+1)$ averag
es to 0 at almost all scales when n restricted to\nhave a specific number
of prime divisors $Omega(n)=k$\, for any\n'popular' value of k (that is\,
$k = log log N + O($sqrt{log log N}$)$\nfor n<=N). \n\nWe shall also discu
ss a recent generalization by C. Pilatte\, who has\nsucceeded in proving t
hat a graph with edges that are rough integers\,\nrather than primes\, als
o has a strong local expander property almost\neverywhere\, following the
same strategy. As a result\, he has obtained\na bound with $O(1/(log x)^c)
$ instead of $O(1/sqrt{log log x})$ in the\nabove\, as well as other impro
vements in consequences across the board.
DTSTART:20240405T200000Z
DTEND:20240405T210000Z
LAST-MODIFIED:20240405T120241Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Number Theory Seminar
URL:https://www.ias.edu/math/events/special-number-theory-seminar-10
END:VEVENT
BEGIN:VEVENT
UID:30316563-6261-4338-b961-383633306363
DTSTAMP:20240519T012345Z
CREATED:20240201T175224Z
DESCRIPTION: \nHISTORY OF SCIENCE LECTURE FEATURING CHEN-PANG YEANG\n_TRANS
FORMING NOISE: A HISTORY OF ITS SCIENCE AND TECHNOLOGY FROM\nDISTURBING SO
UNDS TO INFORMATIONAL ERRORS\, 1900-1955_\nFRIDAY\, APRIL 5\, 2024\n5:30 P
.M. | DILWORTH ROOM \n\n \n\nThis talk examines the historical origin of t
he attempts to\nunderstand\, control\, and use noise in modern times. Toda
y\, the\nconcept of noise is employed to characterize random fluctuations
in\ngeneral. Before the twentieth century\, however\, noise only meant\ndi
sturbing sounds. Through the first half of the twentieth century\,\nnoise
underwent a conceptual transformation from unwanted sounds that\nneeded to
be domesticated into a synonym for errors and deviations on\nall kinds of
signals and information. It is argued that this\ntransformation proceeded
in four stages. The rise of sound\nreproduction technologies (phonograph\
, telephone\, and radio) through\n1900 into the 20s prompted engineers to
tackle unwanted sounds as\nphysical effects of media through quantitative
representations and\nmeasurements. Around the same time\, physicists devel
oped a theory of\nBrownian motions for random fluctuations and applied it
to electronic\nnoise in thermionic tubes of telecommunication systems. The
se\ntechnological and scientific backgrounds led to three distinct\ntheore
tical treatments of noise between 1920 and 1940: statistical\nphysicists’
studies of Brownian fluctuations’ temporal evolution\,\nradio engineers’ s
pectral analysis of atmospheric disturbances\, and\nmathematicians’ measur
e-theoretic formulation. Finally\, during and\nafter World War II\, resear
chers working on the military projects of\nradar\, gunfire control\, and s
ecret communications converted the\ninterwar theoretical studies of noise
into tools for statistical\ndetection\, estimation\, prediction\, and info
rmation transmission. In\nso doing\, they turned noise into an information
al concept. Since the\ngrappling of noise involved multiple disciplines\,
its history sheds\nlight on the interactions between physics\, mathematics
\, mechanical\ntechnology\, electrical engineering\, and information and d
ata sciences\nin the twentieth century.\n\nCHEN-PANG YEANG\nAssociate Prof
essor at the Institute for the History and Philosophy of\nScience and Tech
nology\, University of Toronto\n\nRegister below to attend.
DTSTART:20240405T213000Z
DTEND:20240405T213000Z
LAST-MODIFIED:20240311T194449Z
LOCATION:Dilworth
SUMMARY:History of Science Lecture with Chen-Pang Yeang
URL:https://www.ias.edu/events/history-science-lecture-chen-pang-yeang
END:VEVENT
BEGIN:VEVENT
UID:66393136-6439-4466-b033-653632633536
DTSTAMP:20240519T012345Z
CREATED:20240304T193352Z
DESCRIPTION:Topic: Polynomial Capacity and its Applications: To TSP and Bey
ond \n\nSpeakers: Jonathan Leake\n\nAbout 20 years ago\, Gurvits developed
the notion of polynomial\ncapacity to give a simple proof of the famous v
an der Waerden lower\nbound on the permanent of a doubly stochastic matrix
. Since then\,\nsimilar techniques have led to various other applications\
; for\nexample: approximate counting of the lattice points of certain\npol
ytopes\, an efficient algorithm for the non-commutative version of\nthe po
lynomial identity testing problem\, and most recently\, an\nimproved appro
ximation factor for the traveling salesperson problem\n(TSP) via the max-e
ntropy algorithm.\n\nIn this talk\, we will discuss polynomial capacity\,
some of its\napplications\, and its connection to entropy optimization. In
\nparticular\, we will discuss how we (with Gurvits and Klein) recently\nu
sed polynomial capacity to further improve the TSP approximation\nfactor.
\n\nJoint work with Petter Brändén\, Leonid Gurvits\, Nathan Klein\, Igor
\nPak\, Nisheeth Vishnoi.
DTSTART:20240408T150000Z
DTEND:20240408T160000Z
LAST-MODIFIED:20240502T192044Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-571
END:VEVENT
BEGIN:VEVENT
UID:36373334-3961-4633-b533-383961336539
DTSTAMP:20240519T012345Z
CREATED:20240122T151237Z
DESCRIPTION:Topic: General Discussion
DTSTART:20240408T160000Z
DTEND:20240408T170000Z
LAST-MODIFIED:20240408T122935Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-111
END:VEVENT
BEGIN:VEVENT
UID:35353263-3134-4362-a539-646136383065
DTSTAMP:20240519T012345Z
CREATED:20240112T155350Z
DESCRIPTION:Topic: Gromov-Witten Invariants and Complex Cobordism\n\nSpeake
rs: Shaoyun Bai\n\nSince the beginning of the subject\, it has been specul
ated that\nGromov-Witten invariants should admit refinements in complex\nc
obordism. I will propose a resolution of this question based on joint\nwor
k-in-progress with Abouzaid\, building on recent advances in\nSymplectic T
opology (FOP perturbations developed jointly with Xu) and\nfunctorial reso
lution of singularities from algebraic geometry.
DTSTART:20240408T163000Z
DTEND:20240408T174500Z
LAST-MODIFIED:20240408T140835Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Symplectic Geometry Seminar
URL:https://www.ias.edu/math/events/symplectic-geometry-seminar-17
END:VEVENT
BEGIN:VEVENT
UID:62323335-6161-4234-b361-373763613835
DTSTAMP:20240519T012345Z
CREATED:20231204T184335Z
DESCRIPTION:Topic: An Overview of Geometric Measure Theory\, Area Minimisin
g Currents\, and Recent Progress\n\nSpeakers: Paul Minter\n\nStructures wh
ich minimise area appear in numerous geometric contexts\noften related to
degeneration phenomena. In turn\, in many situations\nthese structures als
o reflect the ambient geometry in some way (they\nare ‘calibrated’) and so
they may provide a way to study the\ninterplay between geometry and topol
ogy\, as has historically been the\ncase for variational methods in geomet
ry.\n\n \n\nAlmgren developed a theory which established that these area\n
minimising structures are manifolds away from a codimension 2\n‘singular s
et’. The singular set itself\, however\, remained rather\nmysterious\, inc
luding whether it necessarily has locally finite\nmeasure\, unique tangent
cones\, or geometric structure\n(rectifiability).\n\n \n\nIn this talk I
will attempt to give an overview of these ideas\, as\nwell as of recent wo
rk (joint with Camillo De Lellis and Anna\nSkorobogatova) answering some o
f the questions above related to\nsingularities of area minimisers.
DTSTART:20240408T180000Z
DTEND:20240408T190000Z
LAST-MODIFIED:20240408T185443Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Members' Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-68
END:VEVENT
BEGIN:VEVENT
UID:34373538-6134-4533-a637-346230356231
DTSTAMP:20240519T012345Z
CREATED:20231206T182258Z
DESCRIPTION:Topic: Recent Progress on Hodge Loci\n\nSpeakers: Bruno Klingle
r\n\nGiven a quasi projective family S of complex algebraic varieties\, it
s\nHodge locus is the locus of points of S where the corresponding\nvariet
y admits exceptional Hodge classes (conjecturally: exceptional\nalgebraic
cycles). In this talk\, I will survey the many recent\nadvances in our und
erstanding of such loci\, as well as the remaining\nopen questions.
DTSTART:20240408T193000Z
DTEND:20240408T203000Z
LAST-MODIFIED:20240403T165302Z
LOCATION:Fine 322\, Princeton University
SUMMARY:Joint IAS/Princeton Arithmetic Geometry Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-arithmetic-geometry-
seminar-20
END:VEVENT
BEGIN:VEVENT
UID:38626466-3234-4536-b866-633866626131
DTSTAMP:20240519T012345Z
CREATED:20240227T185801Z
DESCRIPTION: \n2024 PUBLIC POLICY LECTURE\n_'THIS ISN'T A NEW WEAPON\, IT I
S A NEW WORLD'—THREE THINGS\nOPPENHEIMER TELLS US ABOUT TECH._\nMARGRETHE
VESTAGER\nTUESDAY\, APRIL 9\, 2024\n9:00 A.M. | WOLFENSOHN HALL\n\nJoin us
on Tuesday\, April 9\, at 9 a.m. ET for a special event at the\nInstitute
\, when Margrethe Vestager\, the Executive Vice President of\nthe European
Commission for A Europe Fit for the Digital Age and a\nleading global voi
ce on technology policy and equitable innovation\,\ndelivers the 2024 IAS
Public Policy Lecture in Wolfensohn Hall. The\nEVP’s lecture will be follo
wed by a Q&A led by IAS Faculty member\nAlondra Nelson\, the Harold F. Lin
der Chair in the School of Social\nScience.\n\n_This event will be livestr
eamed. Please register below to attend\nin-person or to receive a link to
the livestream. _\n\n_THE 2024 PUBLIC POLICY LECTURE IS FUNDED BY AN ANONY
MOUS GIFT AND\nCURATED BY THE SCHOOL OF SOCIAL SCIENCE._
DTSTART:20240409T130000Z
DTEND:20240409T130000Z
LAST-MODIFIED:20240405T210510Z
LOCATION:Wolfensohn Hall
SUMMARY:2024 Public Policy Lecture
URL:https://www.ias.edu/events/2024-public-policy-lecture
END:VEVENT
BEGIN:VEVENT
UID:63326663-3130-4564-b265-623664326332
DTSTAMP:20240519T012345Z
CREATED:20240304T193924Z
DESCRIPTION:Topic: The Method of Hypergraph Containers\n\nSpeakers: Wojciec
h Samotij\n\nThe method of hypergraph containers is a widely-applicable te
chnique\nin probabilistic combinatorics. The method enables one to gain co
ntrol\nover the independent sets of many `interesting' hypergraphs by\nexp
loiting the fact that these sets exhibit a certain subtle\nclustering phen
omenon. Since many problems studied in extremal and\nprobabilistic combina
torics\, Ramsey theory\, and discrete geometry can\nbe (naturally) phrased
in terms of independent sets in auxiliary\nhypergraphs\, good control ove
r these sets has many `practical'\nconsequences.\n\nIn the first part of t
his talk\, I will provide a gentle introduction\nto the method\, guided an
d motivated by the following elementary\nproblem in Ramsey theory: Does th
ere exist a graph G without a\ncomplete subgraph on four vertices that can
not be partitioned into two\ntriangle-free graphs?\n\nThe heart of the met
hod is a hypergraph container lemma (HCL) – a\nformal statement that quant
ifies the aforementioned notion of\nclustering. In the second part of this
talk\, I will state and discuss\nseveral HCLs and\, if time permits\, ske
tch a (short) proof of one of\nthem (found recently in collaboration with
Marcelo Campos).
DTSTART:20240409T143000Z
DTEND:20240409T163000Z
LAST-MODIFIED:20240502T192018Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-563
END:VEVENT
BEGIN:VEVENT
UID:63333265-6134-4964-a631-343266373230
DTSTAMP:20240519T012345Z
CREATED:20240122T154446Z
DESCRIPTION:The Bahcall Lunch follows the astrophysics colloquium lecture.
DTSTART:20240409T163000Z
DTEND:20240409T173000Z
LAST-MODIFIED:20240122T154445Z
LOCATION:Lewis Library\, Princeton University
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-69
END:VEVENT
BEGIN:VEVENT
UID:36663138-3765-4131-b464-353137623038
DTSTAMP:20240519T012345Z
CREATED:20240122T161443Z
DESCRIPTION:Topic: Journal Club
DTSTART:20240409T200000Z
DTEND:20240409T210000Z
LAST-MODIFIED:20240408T122919Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Princeton University Computational Astrophysics Club
URL:https://www.ias.edu/sns/events/princeton-university-computational-astro
physics-club-33
END:VEVENT
BEGIN:VEVENT
UID:63313764-3034-4530-b763-323230653465
DTSTAMP:20240519T012345Z
CREATED:20240214T175105Z
DESCRIPTION: \nS.T. LEE PUBLIC LECTURE\n_REFLECTED IN WATER: A CONVERSATION
ON DEVELOPMENT\, RESILIENCE AND\nINEQUALITIES_\nANDREA RINALDO\n\nWill fu
ture large-scale water resources plans make compelling\narguments for incl
uding the reduction of the loss of biodiversity\nacross scales in fluvial
landscapes? Is the structure of river\nnetworks a template for the large-s
cale spread of waterborne disease\ninfections? Are we capable of providing
solid economic arguments for\npreventing water development schemes in the
light of the social and\neconomic cost of predicted increased burden of d
isease they would\nbring? Do biological invasions\, including historic pop
ulation\nmigrations that shaped human community compositions as we see the
m\nnow\, depend on physical constraints like the waterscape acting as the
\nsubstrate for their dispersal?\n \nSocial discounting applied to public
policies concerned with the\npreservation of the natural capital needs qua
ntitative assessments\,\nand thus environmental science and engineering. K
ey is our capability\nto assess and predict the fate of water controls on
living\ncommunities. My take is: Time is ripe to rethink the distributive
\njustice of water resources management and to reduce inequalities on a\ng
lobal scale. When I travel in the south of the world\, I see that\naccess
to safe water distribution networks is socially biased\, but the\nownershi
p of a cell phone is not. When we acknowledge that large-scale\nwater mana
gement plans may cause loss of biodiversity or foster the\nspread of pover
ty-reinforcing disease\, we account easily for the GDP\nimpact of improved
agriculture on the local economy\, but do not yet\nput a price tag on the
ecosystem services we lose for good\, nor to the\ntrue cost of disease. T
his has to change. We now have the\ntools––reflected in water.\n\nANDREA R
INALDO\nRecipient of the 2023 Stockholm Water Prize\nProfessor of Hydrolog
y and Water Resources\, École Polytechnique\nFédérale Lausanne\; Director\
, Laboratory of Ecohydrology\nECHO/ISTE/ENAC Facultè ENAC Professor\, Univ
ersità di Padova\nPresident\, Istituto Veneto di Scienze\, Lettere ed Arti
\, Venice\n\nTUESDAY\, APRIL 9\, 2024\n5:00 P.M. | WOLFENSOHN HALL\n\n_THI
S PUBLIC LECTURE IS MADE POSSIBLE BY THE DR. S. T. LEE FUND FOR\nHISTORICA
L STUDIES._
DTSTART:20240409T210000Z
DTEND:20240409T210000Z
LAST-MODIFIED:20240320T184820Z
LOCATION:Wolfensohn Hall
SUMMARY:S.T. Lee Lecture with Andrea Rinaldo
URL:https://www.ias.edu/events/st-lee-lecture-andrea-rinaldo
END:VEVENT
BEGIN:VEVENT
UID:30666235-6533-4138-b930-326333326235
DTSTAMP:20240519T012345Z
CREATED:20240305T221228Z
DESCRIPTION: \nS.T. LEE PUBLIC WORKSHOP: HISTORICAL AND SCIENTIFIC PERSPECT
IVES ON\nCLIMATE AND SOCIETY\nWEDNESDAY\, APRIL 10\, 2024\n9:00 A.M.–6:00
P.M. | WEST BUILDING\, LECTURE HALL\n\n_HISTORICAL AND SCIENTIFIC PERSPECT
IVES ON CLIMATE AND SOCIETY_\n\n_9:00–9:15 NICOLA DI COSMO (IAS):
INTRODUCTORY\nREMARKS_\n\n_MORNING SESSION CHAIR: GABRIEL VECCHI (Princet
on University)_\n \n_9:15–10:30 JÜRG LUTERBACHER\, _EU MedEWSa Conso
rtium\n_EARLY WARNING FOR ALL (EW4ALL): OPPORTUNITIES FOR UN ORGANIZATIONS
\nAND SCIENTISTS TO COLLABORATE ON GLOBAL CLIMATE CHALLENGES_\n\n10:30–10:
45 Coffee Break\n \n10:45–12:15 _MICHAEL FRACHETTI\, Washington Unive
rsity in\nSt. Louis_\n_THE ‘TRUTH' AS WE KNOW IT: SCIENTIFIC RENDERINGS OF
PALEOCLIMATE\nAND ANCIENT SOCIETIES IN ARCHAEOLOGICAL PERSPECTIVE_\n\n12:
15–1:15 Lunch\n \n_AFTERNOON SESSION CHAIR: ANDREA RINALDO_ (École Polyte
chnique\nFédérale Lausanne)\n \n1:15–2:30 _ JULIA ADENEY THOMAS\, U
niversity of Notre\nDame_\n_HISTORY’S NATURAL TURNS: CLIMATE\, ENVIRONMENT
\, AND THE ANTHROPOCENE\nAS FRAMEWORKS FOR HISTORIANS?_\n \n2:30–3:45
_ELENA\nXOPLAKI\, Justus-Liebig-University of Giessen_\n_CLIMATE VARI
ABILITY AND SOCIETAL RESILIENCE: CHALLENGES AND\nOPPORTUNITIES FOR INTERDI
SCIPLINARY STUDIES_\n\n3:45–4:00 Coffee Break\n \n4:00–5:15 _NICOL
A DI COSMO\, IAS_\n_CONNECTING PALEOCLIMATE AND HISTORICAL RESEARCH: A CR
ITICAL VIEW_\n \n5:15–6:30 _ANDREA RINALDO & GABRIEL VECCHI_\n_GE
NERAL DISCUSSION AND CONCLUDING REMARKS_\n \n \n \nBIOS\nNICOLA DI COSMO i
s the Henry Luce Foundation Professor in East Asian\nStudies at the Instit
ute for Advanced Study\, School of Historical\nStudies. His work has focus
ed on the history of Chinese and Inner\nAsian frontiers from the ancient t
o the modern periods\, history of\nnomadic peoples\, and history of late i
mperial China. His most recent\nwork tries to integrate paleoclimatic data
and historical sources\,\nwith special reference to the history of Mediev
al Eurasia and the\nMongol Empire. Studies in this area have been publishe
d\, among others\,\nin _Scientific Reports_\, _Nature Geoscience_\, _Clima
te\nChange_\, and _Science\nAdvance_s. https://www.ias.edu/scholars/di-cos
mo\n\nMICHAEL FRACHETTI is Professor of Archaeology in the Department of\n
Anthropology and Director/PI: Spatial Analysis\, Interpretation\, and\nExp
loration (SAIE) laboratory at Washington University in St. Louis.\nHe is t
he author of _Pastoralist Landscapes: Social Interaction\nin Bronze Age Eu
rasia (2008\, Cambridge University Press). _He was\nelected as a foreign
corresponding member of the German\nArchaeological Institute in 2017 and i
s Associate Editor of the\nJournal of World Prehistory. As a National Geog
raphic Explorer\, he has\nled decades of archaeological surveys and excava
tions in Kazakhstan\nand Uzbekistan focused on the ecology and life ways o
f mobile\npastoralists from the Bronze Age to the Medieval era. From 2021–
24\nhe participated as core-member of the interdisciplinary research group
\nnVolcanoes\, Climate and History” at the Center for\nInterdisciplinary R
esearch (ZiF - Bielefeld Germany). He is Honorary\nProfessor at Northwest
University\, Xi’an (China).\n \nJÜRG LUTERBACHER is Director of Science an
d Innovation and Chief\nScientist at the World Meteorological Organization
(WMO). Appointed by\nUN Secretary General Guterres in 2020\, he is a memb
er of the\nScientific Advisory Board\, a body that advises UN leaders on n
ew\ntrends in science/technology. At WMO secretariat\, Luterbacher is\nres
ponsible for the global programs World Climate Research\, World\nWeather R
esearch and Global Atmosphere Watch. He graduated from the\nUniversity of
Bern\, Switzerland\, and has been Professor of\nClimatology/Climate Dynami
cs/Climate Change in Germany. He was a lead\nauthor of IPCC AR5 and publis
hed more than 200 peer-reviewed\npublications. https://public.wmo.int/en/a
bout-us/secretariat/j%C3%BCrg-luterbacher\n \nANDREA RINALDO is a leading
authority in hydrologic sciences. His\npioneering research has led to new
insights into the complex ways in\nwhich water shapes the Earth’s surface
and ecosystems\, and has\nprovided in-depth knowledge of how solutes and p
opulations move at\nvarying speed\, both on and beneath the Earth’s surfac
e. Professor\nRinaldo’s quantitative analyses provide a fundamental unders
tanding\nof rivers as ecological corridors. With the development and\nmain
tenance of such corridors being largely responsible for the spread\nof aqu
atic species and their populations\, this research is key for\nhelping pol
icies and practices improve the preservation of species.\nProfessor Rinald
o’s models of water’s role in disease transmission\nhave been applied to r
eal-world hotspots of diseases\, such as cholera\nand schistosomiasis in H
aiti\, South Sudan\, and Burkina Faso\, linking\nfundamental research to r
eal-life\napplication. https://siwi.org/latest/hydrologist-andrea-rinaldo-
wins-stockholm-water-prize-2023/ \; \nhttps://people.epfl.ch/andrea.rinald
o\n \nJULIA ADENEY THOMAS is an intellectual historian focusing on Japan a
nd\non the Anthropocene. She is the award-winning author\nof _Reconfigurin
g Modernity: Concepts of Nature in Japanese\nIdeology_\; _Strata and Three
Human Stories_\; and _The Anthropocene:\nA Multidisciplinary Approach\, _
written with geologists Mark Williams\nand Jan Zalasiewicz and translated
into four languages. She is also\neditor or co-editor of four books: _Japa
n at Nature's\nEdge_\; _Rethinking Historical Distance_\; _Visualizing Fas
cism: The\nTwentieth Century Rise of the Global Right_\; and _Altered Eart
h:\nGetting the Anthropocene Right. _With colleagues around the world\,\nT
homas seeks to bridge the divide between the humanities and the\nsciences
to address our global environmental crisis. Educated at\nPrinceton\, Oxfor
d\, and Chicago\, she now teaches history at the\nUniversity of Notre Dame
.\n \nGABRIEL VECCHI is the Knox Taylor Professor of Geosciences and at\nt
he High Meadows Environmental Institute in Princeton University.\nSince Ju
ly 2021\, he has been Director of the High Meadows\nEnvironmental Institut
e. Vecchi is also the Deputy Director of the\nCooperative Institute for Mo
deling the Earth System (CIMES)\, a joint\ninstitute between Princeton Uni
versity and NOAA\, and from July\n2019 to July 2021 was its Director. Vecc
hi's research focuses on\nunderstanding short- and long-term changes to th
e oceans and\natmosphere\, including climate changes\, the monsoons\, El N
iño\, and the\nimpact of climate on tropical cyclones\, weather extremes\,
and global\npatterns of rainfall and drought. https://vecchi.princeton.ed
u/\n \nELENA XOPLAKI is a Senior Scientist\, currently Acting Head of the
\nClimatology\, Climate Dynamics and Climate Change Research Group at the
\nJustus-Liebig-University Giessen in Germany. She is an expert on past\,
\npresent\, and future climate variability and change with a spatial\nfocu
s on the Greater Mediterranean. She conducts multi- and\ninterdisciplinary
research and promotes collaboration between natural\nsciences\, humanitie
s\, and social sciences at an international level.\nShe works with climate
observations\, climate models\, and climate\nproxies. Her projects focus
on extreme and compound events and their\nimpacts on the food sector\, the
preparation of early warning systems\,\nand the enhancement of climate re
silience in European metropolitan\nareas. She is a Fellow of the European
Academy of Sciences.\n \n\n_THIS PUBLIC LECTURE IS MADE POSSIBLE BY THE DR
. S. T. LEE FUND FOR\nHISTORICAL STUDIES._
DTSTART:20240410T130000Z
DTEND:20240410T223000Z
LAST-MODIFIED:20240320T193850Z
LOCATION:West Building Lecture Hall
SUMMARY:S.T. Lee Public Workshop: Historical and Society Perspectives on Cl
imate and Society
URL:https://www.ias.edu/events/st-lee-public-workshop-historical-and-societ
y-perspectives-climate-and-society
END:VEVENT
BEGIN:VEVENT
UID:62633932-6231-4365-b161-633232633961
DTSTAMP:20240519T012345Z
CREATED:20240320T123848Z
DESCRIPTION:Topic: Rationalized Syntomic Cohomology\n\nSpeakers: Jacob Luri
e\n\nA few years ago\, Bhatt-Morrow-Scholze introduced an invariant of\n$p
$-adic formal schemes called syntomic cohomology\, which has a close\nrela
tionship to (étale-localized) algebraic $K$-theory. In a recent\npaper\, A
ntieau-Mathew-Morrow-Nikolaus showed that\, after inverting\n$p$\, syntomi
c cohomology admits a concrete description in terms of\nmore familiar inva
riants\, such as de Rham and crystalline cohomology.\nIn this talk\, I'll
explain an alternative perspective on their result\,\nwhich avoids the use
of $K$-theoretic methods.
DTSTART:20240410T180000Z
DTEND:20240410T190000Z
LAST-MODIFIED:20240506T120710Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Seminar
URL:https://www.ias.edu/math/events/special-year-seminar-16
END:VEVENT
BEGIN:VEVENT
UID:65316433-3263-4261-b161-343863656431
DTSTAMP:20240519T012345Z
CREATED:20240122T163601Z
DESCRIPTION:Topic: The Celestial Hologram: From Stargazing to Quantum Gravi
ty and Back\n\nSpeakers: Sabrina Gonzalez Pasterski\n\nThe holographic pri
nciple suggests that the laws of physics governing\nour universe can be ex
plained by a simpler\, equivalent theory defined\non the edge of spacetime
. However\, its realizations in String Theory\nare associated with a type
of universe that doesn't resemble ours.\nRecent advancements that leverage
infrared physics have helped us\napply this principle to spacetimes that
look more like our own\, giving\nus new symmetries that constrain the rele
vant laws of physics.\nCelestial Holography proposes that our universe can
be understood as a\nprojection on the night sky. This new approach involv
es an exciting\ncollaboration of researchers from various subfields\, from
quantum\nfield theory to mathematical physics and quantum gravity. This t
alk\nwill explore how our age-old fascination with the night sky merges\nw
ith cutting-edge advancements in our understanding of quantum\ngravity.
DTSTART:20240410T200000Z
DTEND:20240410T211500Z
LAST-MODIFIED:20240122T163600Z
LOCATION:Virtual Meeting
SUMMARY:Princeton Plasma Physics Laboratory (PPPL) Colloquium
URL:https://www.ias.edu/sns/events/princeton-plasma-physics-laboratory-pppl
-colloquium-13
END:VEVENT
BEGIN:VEVENT
UID:63633830-3034-4966-a537-396664643066
DTSTAMP:20240519T012345Z
CREATED:20240112T153945Z
DESCRIPTION:Topic: Can One Hear the Winding Number?\n\nSpeakers: Stan Palas
ek\n\nWe discuss a modern perspective on the winding number on $S^1$ for\n
maps that may not be continuous. This reveals a surprising connection\nto
Fourier analysis and motivates the question: is the winding number\ndeterm
ined by the moduli of the Fourier coefficients?
DTSTART:20240410T220000Z
DTEND:20240411T000000Z
LAST-MODIFIED:20240405T123306Z
LOCATION:Birch Garden\, Simons Hall
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-276
END:VEVENT
BEGIN:VEVENT
UID:38343836-3765-4634-b539-623132663132
DTSTAMP:20240519T012345Z
CREATED:20240126T151753Z
DESCRIPTION:Topic: Étale Sheaves on Bun$_G$ I\n\nSpeakers: Alexander Petrov
DTSTART:20240411T140000Z
DTEND:20240411T160000Z
LAST-MODIFIED:20240506T120641Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Learning Seminar
URL:https://www.ias.edu/math/events/special-year-learning-seminar-28
END:VEVENT
BEGIN:VEVENT
UID:39303530-3762-4731-b636-646261303263
DTSTAMP:20240519T012345Z
CREATED:20240122T164938Z
DESCRIPTION:Topic: Star Formation and Feedback: A Modern Primer\n\nSpeakers
: Eve Ostriker\n\nThe cosmic history of galaxy formation is the history of
star\nformation writ large. Some of the most important processes affecti
ng\ngalaxy evolution involve coupling between stellar and gaseous\ncompone
nts\, since massive stars are the primary energy source in the\ninterstell
ar medium (ISM). The majority of stellar energy —\nincluding UV radiation
\, winds\, and supernovae — is returned rapidly\nafter a given population
of stars forms\, and is therefore collectively\ntermed “star formation fee
dback.” I will review current theory of\nthe physics of feedback\, showcas
ing results from state-of-the-art\,\nhigh-resolution numerical radiation-m
agnetohydrodynamic simulations\nthat directly follow multiphase ISM evolut
ion including the effects of\nUV radiation\, stellar winds\, and supernova
e. These simulations\, on\nboth scales of individual star-forming molecula
r clouds\, and scales of\ngalactic disks\, show star formation efficiencie
s and rates that are\nconsistent with detailed observations in the nearby
universe\, and also\nindicate strong sensitivity to environment. At high d
ensities and\nwhere dust and metal abundances are high\, stellar radiation
does not\npropagate as far\, and cooling rates are enhanced. As a result
of the\nreduced effectiveness of feedback in maintaining the ISM pressure
\n(turbulent\, thermal\, and magnetic)\, star formation rates and\nefficie
ncies are expected to increase in high-density\,\nhigh-metallicity environ
ments. Results from suites of resolved\nstar-forming ISM simulations have
been used to calibrate new subgrid\nmodels\, and incorporation of these ne
w results in galaxy formation\nmodels may potentially significantly change
predictions for star\nformation at high redshift.
DTSTART:20240411T150000Z
DTEND:20240411T160000Z
LAST-MODIFIED:20240408T123807Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-95
END:VEVENT
BEGIN:VEVENT
UID:61646530-3931-4339-b636-356635356563
DTSTAMP:20240519T012345Z
CREATED:20240207T191308Z
DESCRIPTION:Topic: What is a Hardt-Simon foliation?\n\nSpeakers: Anna Skoro
bogatova
DTSTART:20240411T170000Z
DTEND:20240411T180000Z
LAST-MODIFIED:20240329T125056Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-26
END:VEVENT
BEGIN:VEVENT
UID:66323364-6562-4436-a562-303265363865
DTSTAMP:20240519T012345Z
CREATED:20231204T181757Z
DESCRIPTION:Topic: Ax-Schanuel and Exceptional Integrability\n\nSpeakers: J
onathan Pila\n\nIn joint work with Jacob Tsimerman we study when the primi
tive of a\ngiven algebraic function can be constructed using primitives fr
om some\ngiven finite set of algebraic functions\, their inverses\, algebr
aic\nfunctions\, and composition. When the given finite set is just ${1/x}
$\nthis is the classical problem of 'elementary integrability' (of\nalgebr
aic functions). I will discuss some results\, including a\ndecision proced
ure for this question\, and further problems and\nconjectures.
DTSTART:20240411T190000Z
DTEND:20240411T203000Z
LAST-MODIFIED:20240325T131425Z
LOCATION:*Princeton University\, Fine 214*
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-23
END:VEVENT
BEGIN:VEVENT
UID:35303637-3335-4664-b339-323962366634
DTSTAMP:20240519T012345Z
CREATED:20240221T135934Z
DESCRIPTION:Topic: Infinite Orbits In Certain Elliptic Surfaces\, Ax Schan
uel\, and Ramification In The Legendre Family\n\nSpeakers: Umberto Zanni
er\n\nMotivated by work of Cantat-Dujardin\, we study orbits by translatio
ns\nin K3 surfaces with two elliptic fibrations. We prove in particular\nt
hat all orbits are infinite away from a proper Zariski-closed subset.\n\nA
mong the tools\, beyond the Pila-Wilkie counting\, are a new version of\nA
x-Schanuel by Bakker-Tsimerman and a(n old) theorem of Shioda on\nramifica
tion of sections of the Legendre family.\n\nThis is joint work with Corvaj
a and Tsimerman
DTSTART:20240411T203000Z
DTEND:20240411T213000Z
LAST-MODIFIED:20240325T132530Z
LOCATION:*Princeton University\, Fine 214*
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-25
END:VEVENT
BEGIN:VEVENT
UID:35333661-6164-4234-b863-373934336364
DTSTAMP:20240519T012345Z
CREATED:20240112T152015Z
DESCRIPTION:Topic: Three 20 Minute Research Talks \n\nSpeakers: Yan-Lung Le
on Li \, Levin Maier \, Austin Christian \n\n *\nYAN-LUNG LEON LI : _Equiva
riant Lagrangian Correspondence and a\nConjecture of Teleman_\n\nIt has be
en a continuing interest\, often with profound importance\, in\nunderstand
ing the geometric and topological relationship between a\nHamiltonian G-ma
nifold Y and a symplectic quotient X. In this talk\, we\nshall provide pre
cise relations between their (equivariant) Lagrangian\nFloer theory. In pa
rticular\, we will address a conjecture of Teleman\,\nmotivated by 3d mirr
or symmetry\, on the 2d mirror construction of X\nfrom that of Y\, which g
eneralises Givental-Hori-Vafa mirror\nconstruction for toric varieties. Th
e key technical ingredient is the\nKim-Lau-Zheng’s equivariant extension o
f Fukaya’s Lagrangian\ncorrespondence tri-modules over equivariant Floer c
omplexes. Joint\nwork with Siu-Cheong Lau and Naichung Conan Leung. \n\n *
LEVIN MAIER (HEIDELBERG) : TBA\,\n *\nAUSTIN CHRISTIAN : Persistent Legendr
ian Contact Homology \n\nThis talk will report on an REU whose goal was to
introduce the notion\nof persistence into Legendrian contact homology. Th
e LCH of a\nLegendrian knot is computed as the homology of the knot's\nChe
kanov-Eliashberg DGA and is a well-studied invariant of Legendrian\nisotop
y types. For a given Legendrian embedding\, the\nChekanov-Eliashberg DGA a
dmits a natural filtration\, allowing for the\ncomputation of persistent h
omology. The purpose of this REU was to\ninitiate the study of the resulti
ng filtered homology. The project was\njoint with M. Basu\, E. Clayton\, D
. Irvine\, F. Mooers\, and W. Shen.
DTSTART:20240412T131500Z
DTEND:20240412T144500Z
LAST-MODIFIED:20240416T114916Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-145
END:VEVENT
BEGIN:VEVENT
UID:32653530-3364-4439-b462-666535343031
DTSTAMP:20240519T012345Z
CREATED:20240408T131305Z
DESCRIPTION:Topic: TBA
DTSTART:20240412T163000Z
DTEND:20240412T173000Z
LAST-MODIFIED:20240408T131325Z
LOCATION:Dome Room\, Peyton Hall or Zoom
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-69
END:VEVENT
BEGIN:VEVENT
UID:33353461-3631-4132-b964-303336363830
DTSTAMP:20240519T012345Z
CREATED:20240201T141602Z
DESCRIPTION:Topic: K-Theory Satisfies Nisnevich Descent\n\nSpeakers: Longke
Tang\n\nReview the notion of cd-structure for a Grothendieck topology and
\nexplain how it helps check the sheaf conditions. Introduce and discuss\n
the Nisnevich topology for schemes and analytic adic spaces\; in\nparticul
ar\, discuss their equivalent characterizations and describe\nthe points o
f the corresponding topoi. Prove that the Nisnevich\ntopology in both situ
ations comes with a cd-structure. Using it\, prove\nthat nuclear sheaves s
atisfies Nisnevich descent on qcqs analytic adic\nspaces and deduce from i
t Nisnevich descent for localizing invariants.\nSketch the proof of the fa
ct that étale descent is Nisnevich+Galois\nand prove that nuclear sheaves
satisfy étale descent.
DTSTART:20240412T183000Z
DTEND:20240412T203000Z
LAST-MODIFIED:20240201T141601Z
LOCATION:Princeton University\, Fine Hall 314
SUMMARY:Condensed Learning Seminar
URL:https://www.ias.edu/math/events/condensed-learning-seminar-19
END:VEVENT
BEGIN:VEVENT
UID:62303839-3730-4466-b234-323330313063
DTSTAMP:20240519T012345Z
CREATED:20240201T182524Z
DESCRIPTION: \nHISTORY OF SCIENCE LECTURE FEATURING STEPHANIE DICK\n“CASTLE
S IN THE SKY”: MATHEMATICS\, MARXISM\, AND THE MIND IN THE\nEARLY AUTOMATI
ON OF PROOF\nFRIDAY\, APRIL 12\, 2024\n5:30 P.M. | DILWORTH ROOM \n \nComp
eting definitions of “reasoning” abound within mid-twentieth\ncentury atte
mpts to automate it. Many early computing researchers\nbelieved that human
intelligence\, mathematical intelligence in\nparticular\, inhered in our
capacity to reason and\, as such\, thought\nthat the identification and au
tomation of the ‘rules of right\nreasoning’ was the most promising approac
h to the automation of\nproblem solving\, theorem-proving\, and much else.
Most famously\, Allen\nNewell and Herbert Simon’s theory of reasoning-as-
rule-bound\nheuristics was highly influential in early artificial intellig
ence\nresearch. But others\, foremost among them Chinese American logician
\nHao Wang\, rejected their approach to the automation on the grounds\ntha
t their theory of reasoning hardly captured the human reality. Wang\noffer
ed instead an alternative theory of human reasoning that drew in\npart fro
m his training in materialist philosophy in China and his\ninterest in Mar
xism in the 1950s\, and his alternative view also\nengendered an entirely
different approach to the automation of\nmathematics than those working in
“artificial intelligence.”\n\nThis talk explores the competing definition
s of “reasoning” that\naccompanied early automation efforts\, with a focus
on Wang’s\nalternative perspective. Wang sat at the intersection between
\nnEastern” and “Western” culture\, philosophy\, and ideology. His\nwork o
ffers an opportunity to revisit the stakes of automation in\nmathematics\,
the competing techniques and technical achievements of\ndifferent approac
hes\, and the politics of logic in the\ntwentieth century.\n\nSTEPHANIE DI
CK\nAssistant Professor of Communication\nat Simon Fraser University\n\nRe
gister below to attend.
DTSTART:20240412T213000Z
DTEND:20240412T213000Z
LAST-MODIFIED:20240416T132144Z
LOCATION:Dilworth
SUMMARY:History of Science Lecture with Stephanie Dick
URL:https://www.ias.edu/events/history-science-lecture-stephanie-dick
END:VEVENT
BEGIN:VEVENT
UID:34366631-3831-4631-b333-303635303962
DTSTAMP:20240519T012345Z
CREATED:20240122T152424Z
DESCRIPTION:Topic: SAGAbg I: A Near-Unity Mass Loading Factor in Low-Mass G
alaxies via their Low-Redshift Evolution in Stellar Mass\, Oxygen Abundanc
e\, and Star Formation Rate\n\nSpeakers: Erin Kado Fong\n\nEach week\, we
hold a relatively informal seminar/discussion series\nwith an emphasis on
extra-galactic and large-scale structure\nastrophysics.\n\nDuring Galread
a leader/visitor presents a recent paper to the\ndiscussion group. The PDF
of the paper is projected onto a large\nscreen\, and a guest explains the
paper\, section by section\, in greater\ndetail than may be explained wit
hin the text of the article. To aid\nwith discussion\, only the article PD
F is presented -- no\npowerpoint-style slides. Galread discussions are ver
y friendly and\ninteractive.
DTSTART:20240415T150000Z
DTEND:20240415T160000Z
LAST-MODIFIED:20240412T200738Z
LOCATION:Zoom and Peyton Hall\, Grand Central
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-95
END:VEVENT
BEGIN:VEVENT
UID:62343963-6239-4430-a539-303437366433
DTSTAMP:20240519T012345Z
CREATED:20240304T193550Z
DESCRIPTION:Topic: Graphs\, CSPs and Codes\n\nSpeakers: Madhu Sudan\n\nA sp
arsification of a structure\, with respect to a class of queries\,\nproduc
es a compressed representation of the structure while answering\nevery que
ry in the class approximately correctly. The seminal example\nof sparsific
ation is 'graph sparsification with respect to cut\nqueries'\, due to work
s of Karger and Benczur and Karger from the\n1990s\, showing that every gr
aph can be compressed to near-linear size\n(in the number of nodes in the
graph) while approximately capturing\nthe size of every cut in the graph.
In 2015 Kogan and Krauthgamer\ngeneralized the notion of sparsification to
all Constraint\nSatisfaction Problems (CSPs) --- here the structure to be
compressed\nis an instance of the CSP on n variables and a query is an as
signment\nto the n variables\, and the goal thus is to approximately deter
mine\nthe number of constraints satisfied by the queried assignment. Sever
al\nfollow up works gave some non-trivial CSPs that allow for near linear
\n(in n) sparsifications\, including classification of all binary CSPs\n(w
here each constraint applies to two variables) that allow such\nsparsifica
tion\, but the general picture seemed wide open.\n\nIn our works we introd
uce a new class of sparsification problems\,\nnamely code sparsification\,
where the structure to be preserved is a\nlinear error correcting code\;
the query is a message\, and the goal is\nto compute the approximate weigh
t of the encoding of the message. We\nshow that this class of problems giv
es the right language to abstract\nthe techniques of Karger and Benczur an
d Karger --- and indeed all\ncodes can be sparsified to length nearly line
ar in the number of\nmessage bits. This generalization already resolves so
me basic\nquestions in CSP sparsification. A further generalization to add
itive\ncodes over finite abelian groups gives even powerful results and in
\nparticular completely classifies the class of symmetric Boolean CSPs\nth
at allow nearly linear sized sparsification. (Prior to our work even\nthe
case of sparsification of 3-XOR constraints was open.) \n\nBased on joint
works with Sanjeev Khanna (U. Penn.) and Aaron (Louie)\nPutterman (Harvard
).
DTSTART:20240415T150000Z
DTEND:20240415T160000Z
LAST-MODIFIED:20240502T191951Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-572
END:VEVENT
BEGIN:VEVENT
UID:34613935-6537-4034-b737-316232636638
DTSTAMP:20240519T012345Z
CREATED:20240122T151255Z
DESCRIPTION:Topic: General Discussion
DTSTART:20240415T160000Z
DTEND:20240415T170000Z
LAST-MODIFIED:20240412T193728Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-112
END:VEVENT
BEGIN:VEVENT
UID:37346334-3035-4466-b134-333537346563
DTSTAMP:20240519T012345Z
CREATED:20240325T121705Z
DESCRIPTION:Topic: Recent Progress on the Problem of Compact Quotients\n\nS
peakers: Fanny Kassel\n\nThe so-called Problem of Compact Quotients asks f
or which homogeneous\nspaces G/H there exists a discrete subgroup Gamma of
G such that\nGamma\G/H is a compact manifold. We will discuss this proble
m\, and\ndescribe recent progress on it arising from making links with Ano
sov\nsubgroups\, an important class of discrete subgroups of Lie groups th
at\nare often « thinner » and more « flexible » than lattices.
DTSTART:20240415T180000Z
DTEND:20240415T190000Z
LAST-MODIFIED:20240409T135656Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Members' Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-65
END:VEVENT
BEGIN:VEVENT
UID:34633431-3263-4732-a137-363461313061
DTSTAMP:20240519T012345Z
CREATED:20240314T154752Z
DESCRIPTION:Topic: Parallel Repetition for 3-Player XOR Games\n\nSpeakers:
Yang Liu\n\nIn a $3$-$\mathsf{XOR}$ game $\mathcal{G}$\, the verifier samp
les a\nchallenge $(x\,y\,z)\sim \mu$ where $\mu$ is a probability distribu
tion\nover $\Sigma\times\Gamma\times\Phi$\, and a map $t\colon\n\Sigma\ti
mes\Gamma\times\Phi\to\mathcal{A}$ for a finite Abelian group\n$\mathcal{A
}$ defining a constraint. The verifier sends the\nquestions $x$\, $y$ and
$z$ to the players Alice\, Bob and Charlie\nrespectively\, receives answ
ers $f(x)$\, $g(y)$ and $h(z)$ that are\nelements in $\mathcal{A}$ and acc
epts if $f(x)+g(y)+h(z) = t(x\,y\,z)$.\nThe value\, $\mathsf{val}(\mathcal
{G})$\, of the game is defined to be\nthe maximum probability the verifier
accepts over all players'\nstrategies.\n\nWe show that if $\mathcal{G}$ i
s a $3$-$\mathsf{XOR}$ game with value\nstrictly less than $1$\, whose und
erlying distribution over questions\n$\mu$ does not admit Abelian embeddin
gs into $(\mathbb{Z}\,+)$\, then\nthe value of the $n$-fold repetition of
$\mathcal{G}$ is exponentially\ndecaying. That is\, there exists $c=c(\mat
hcal{G})>0$ such that\n$\mathsf{val}(\mathcal{G}^{\otimes n})\leq 2^{-cn}$
. This extends a\nprevious result of [Braverman-Khot-Minzer\, FOCS 2023] s
howing\nexponential decay for the GHZ game. Our proof combines tools from
\nadditive combinatorics and tools from discrete Fourier analysis.\n\nBase
d on joint work with Amey Bhangale\, Mark Braverman\, Subhash Khot\,\nDor
Minzer.
DTSTART:20240416T143000Z
DTEND:20240416T163000Z
LAST-MODIFIED:20240502T191924Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-564
END:VEVENT
BEGIN:VEVENT
UID:39363638-6463-4263-a330-613432356161
DTSTAMP:20240519T012345Z
CREATED:20240122T154503Z
DESCRIPTION:The Bahcall Lunch follows the astrophysics colloquium lecture.
DTSTART:20240416T163000Z
DTEND:20240416T173000Z
LAST-MODIFIED:20240122T154503Z
LOCATION:Lewis Library\, Princeton University
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-70
END:VEVENT
BEGIN:VEVENT
UID:36386139-3037-4764-a330-376539656339
DTSTAMP:20240519T012345Z
CREATED:20240122T161459Z
DESCRIPTION:Topic: Journal Club
DTSTART:20240416T200000Z
DTEND:20240416T210000Z
LAST-MODIFIED:20240412T194312Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Princeton University Computational Astrophysics Club
URL:https://www.ias.edu/sns/events/princeton-university-computational-astro
physics-club-34
END:VEVENT
BEGIN:VEVENT
UID:62353139-6237-4132-b062-366630346461
DTSTAMP:20240519T012345Z
CREATED:20240305T183420Z
DESCRIPTION: \nBOOK TALK WITH GEORGE KIRAZ\nWEDNESDAY\, APRIL 17\, 2024\n4:
00 P.M.\, WHITE–LEVY ROOM\n\nJoin us as George Kiraz\, current Senior Rese
arch Associate in the\nSchool of Historical Studies\, discusses his new me
moir\, _Water the\nWillow Tree_\, which tells the story of his youth as a
Palestinian\ngrowing up in Bethlehem.\n\nThis event is open to the public
with an option to attend virtually\nvia Zoom.\n\nRegister below to attend.
DTSTART:20240417T200000Z
DTEND:20240417T213000Z
LAST-MODIFIED:20240315T224603Z
LOCATION:White–Levy Room
SUMMARY:HS–SS Library Book Talk with George Kiraz
URL:https://www.ias.edu/events/hs-ss-library-book-talk-george-kiraz
END:VEVENT
BEGIN:VEVENT
UID:61613661-3263-4633-b435-383234636639
DTSTAMP:20240519T012345Z
CREATED:20240112T154030Z
DESCRIPTION:Topic: Twisted Torus Embeddings\n\nSpeakers: Sahana Vasudevan\n
\nConsider a right angled cylinder. Glue the ends together after\ntwisting
many times to form a flat torus $C^1$-isometrically embedded\nin $R^3$. W
hat can we say about the global geometry of this embedding?
DTSTART:20240417T220000Z
DTEND:20240418T000000Z
LAST-MODIFIED:20240417T150939Z
LOCATION:Birch Garden\, Simons Hall
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-278
END:VEVENT
BEGIN:VEVENT
UID:33656334-3937-4536-a262-326536656263
DTSTAMP:20240519T012345Z
CREATED:20240130T153948Z
DESCRIPTION:Topic: Étale Sheaves on Bun$_G$ II\n\nSpeakers: Sean Howe
DTSTART:20240418T140000Z
DTEND:20240418T160000Z
LAST-MODIFIED:20240503T193240Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Learning Seminar
URL:https://www.ias.edu/math/events/special-year-learning-seminar-32
END:VEVENT
BEGIN:VEVENT
UID:65346363-3730-4263-a333-653937613636
DTSTAMP:20240519T012345Z
CREATED:20240122T165010Z
DESCRIPTION:Topic: Decoding Supernova Remnants\n\nSpeakers: Abigail Polin\n
\nI will discuss a new method for analyzing the morphology of supernova\nr
emnants (SNRs) by using power specula analysis to diagnose the\ndrivers re
sponsible for structure at different angular scales. Using a\nsuite of hyd
rodynamic models of the Rayleigh–Taylor instability\n(RTI) as a supernova
(SN) collides with its surrounding medium we\ndemonstrate how power spectr
al analysis can be used to attribute which\nscales in an SNR are driven by
RTI and which must be caused by\nintrinsic asymmetries in the initial exp
losion. We predict the power\nspectrum of turbulence driven by RTI and ide
ntify a dominant angular\nmode that represents the largest scale that effi
ciently grows via RTI.\nI will discuss the implications of this work as we
ll as our ongoing\nand future plans to use this methodology\; comparing in
creasingly\ndetailed SN models directly to observed remnant data.
DTSTART:20240418T150000Z
DTEND:20240418T160000Z
LAST-MODIFIED:20240415T124409Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-96
END:VEVENT
BEGIN:VEVENT
UID:35373237-6333-4135-b935-626234653535
DTSTAMP:20240519T012345Z
CREATED:20240213T144425Z
DESCRIPTION:Topic: What is Wave Turbulence?\n\nSpeakers: Michal Shavit
DTSTART:20240418T170000Z
DTEND:20240418T180000Z
LAST-MODIFIED:20240405T132428Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-27
END:VEVENT
BEGIN:VEVENT
UID:32376266-6538-4136-a534-653866303235
DTSTAMP:20240519T012345Z
CREATED:20231204T165404Z
DESCRIPTION:Topic: Zeta and Multizeta for Function Fields\n\nSpeakers: Dine
sh Thakur\n\nWe will describe emerging understanding of the structures rel
ated to\nthe arithmetic of Zeta and Multizeta values for function fields\n
through various results and conjectures.
DTSTART:20240418T203000Z
DTEND:20240418T213000Z
LAST-MODIFIED:20240418T183139Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-17
END:VEVENT
BEGIN:VEVENT
UID:32306361-3364-4462-b139-663837376332
DTSTAMP:20240519T012345Z
CREATED:20240112T152036Z
DESCRIPTION:Topic: From Gromov–Witten Theory to the Closing Lemma\n\nSpeake
rs: Shira Tanny\n\nAn old question of Poincaré concerns creating periodic
orbits via\nperturbations of a flow/diffeomorphism. While pseudoholomorphi
c\nmethods have successfully addressed this question in dimensions 2-3\,\n
the higher-dimensional case remains less understood. I will describe a\nco
nnection between this question and Gromov–Witten invariants\, which\ngoes
through a new class of invariants of symplectic cobordisms. This\nis a joi
nt work with Julian Chaidez.
DTSTART:20240419T131500Z
DTEND:20240419T144500Z
LAST-MODIFIED:20240410T150657Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-146
END:VEVENT
BEGIN:VEVENT
UID:64386238-3832-4835-b361-643639393961
DTSTAMP:20240519T012345Z
CREATED:20240418T130637Z
DESCRIPTION:Topic: The Construction of Large-Scale Structure Catalogs using
Data from the Dark Energy Spectroscopic Instrument and Results from the 1
st Data Release\n\nSpeakers: Ashley Ross (Ohio State)
DTSTART:20240419T180000Z
DTEND:20240419T190000Z
LAST-MODIFIED:20240418T130732Z
LOCATION:Zoom and Peyton 025
SUMMARY:Princeton University Survey Science Discussion
URL:https://www.ias.edu/sns/events/princeton-university-survey-science-disc
ussion-7
END:VEVENT
BEGIN:VEVENT
UID:62653662-3236-4233-b839-633532363636
DTSTAMP:20240519T012345Z
CREATED:20231207T143710Z
DESCRIPTION:Topic: Generalized Cylinder Limits of Ricci Flow Singularities
\n\nSpeakers: Natasa Sesum\n\nWe study multiply warped product\ngeometries
MN:=Bn×Fn1×···×FnA \n\ng = g_B + \sum_{a=1}^A v_a^2 g_{F^{n_a}} and show
that for an open\nset of initial data within multiply warped product geome
tries the\nRicci flow starting at any of those develops generalized cylind
er as\nsingularity model. More precisely\, for any p and q we construct an
\nopen set of initial data within multiply warped product geometris\nwhose
Ricci flows develop S^p\times R^q as a singularity model.
DTSTART:20240419T183000Z
DTEND:20240419T193000Z
LAST-MODIFIED:20240506T183601Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Joint IAS/PU Analysis Seminar
URL:https://www.ias.edu/math/events/joint-iaspu-analysis-seminar-8
END:VEVENT
BEGIN:VEVENT
UID:32366464-3165-4131-b533-343034326538
DTSTAMP:20240519T012345Z
CREATED:20240404T171710Z
DESCRIPTION:Topic: Étale Hyperdescent\n\nSpeakers: Sally Gilles\n\nIntroduc
e the notion of hypersheaf and discuss its basic properties\nand equivalen
t characterizations. In particular\, discuss the notions\nof homotopy and
cohomological dimensions and their relation to\nhyperdescent. Sketch the p
roof of the fact for finite dimensional qcqs\nschemes and analytic adic sp
ace\, the corresponding Nisnevich topos has\nfinite homotopy dimension. Ex
plain the counterexample [CM21\, Example\n4.15] in the étale case. Sketch
the proof of the hypercompleteness\ncriterion in terms of topos theoretic
points (see [CM21\, Theorem 4.36]\nand its adic analog [And23\, Satz B.31]
) and use it to prove that for\nfinite dimensional analytic adic spaces\,
localizing invariants satisfy\nétale hyperdescent after chromatic localiza
tion (see [And23\, Satz\n5.14]) using the algebraic analog as input (see [
CM21\, Theorem 7.14]).
DTSTART:20240419T183000Z
DTEND:20240419T203000Z
LAST-MODIFIED:20240404T171807Z
LOCATION:Princeton University\, Fine Hall 314
SUMMARY:Condensed Learning Seminar
URL:https://www.ias.edu/math/events/condensed-learning-seminar-20
END:VEVENT
BEGIN:VEVENT
UID:61666661-6663-4830-a432-343565373761
DTSTAMP:20240519T012345Z
CREATED:20231207T143620Z
DESCRIPTION:Topic: An Energy Model for Harmonic Graphs with Junctions\n\nSp
eakers: Ovidiu Savin\n\nWe consider an energy model for N ordered elastic
membranes subject to\nforcing and boundary conditions. The heights of the
membranes are\ndescribed by real functions u_1\, u_2\,...\,u_N\, which min
imize an energy\nfunctional involving the Dirichlet integral and a potenti
al term\ndepending on the cardinality of the set {u_1\,..\,u_N}. The poten
tial\nterm corresponds to the physical situation when consecutive membrane
s\nare glued to each other on their coincidence set. The problem can be\nu
nderstood as a system of N-1 coupled one-phase free boundary problems\nwit
h interacting free boundaries. \n\nI will review the known results in the
scalar case\, and discuss the\nfree boundary regularity when dealing with
3 or more membranes (joint\nwith D. De Silva.)
DTSTART:20240419T200000Z
DTEND:20240419T210000Z
LAST-MODIFIED:20240506T183633Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Joint IAS/PU Analysis Seminar
URL:https://www.ias.edu/math/events/joint-iaspu-analysis-seminar-7
END:VEVENT
BEGIN:VEVENT
UID:65316430-6334-4663-b161-653338306161
DTSTAMP:20240519T012345Z
CREATED:20240311T222014Z
DESCRIPTION: \nROGER E. COVEY DISTINGUISHED LECTURE ON PREMODERN CHINA\n\n_
CAN WE READ A CHANGE OF WORLD VIEWS FROM GHOST STORIES? 'BELIEF' IN\nSEVEN
TH- THROUGH TWELFTH-CENTURY CHINA_\n\nROBERT P. HYMES\nCarpentier Professo
r of Chinese History\, Columbia University\n\nTwo massive premodern Chines
e collections of short narratives\, from\nthe tenth century and twelfth ce
ntury respectively\, preserve many\nhundreds of anecdotes about human enco
unters with ghosts and gods\,\ndrawn from the seventh through tenth centur
ies in the first collection\nand from the eleventh and twelfth centuries i
n the second. I call them\n“anecdotes” instead of “stories” or “tales” bec
ause their\ntellers told them _as true_: they did not present them as crea
tive\nfictions\, but as records of strange things that had really happened
.\nIn both collections\, the anecdotes sometimes reflected the efforts of
\nreligious propagandists or proselytizers to spread a specific message\,
\nbut in other cases were simply drawn from––and in either case\nroutinely
entered into––the day-to-day and year-to-year practice\nof occult gossip\
, a standard elite recreation of these periods. They\nare the sorts of mys
terious\, scary\, edifying\, or entertaining\nanecdotes that aristocrats\,
educated gentlemen\, monks\, priests\, and\nperhaps ordinary people would
tell each other at their leisure over\nwine or tea in pavilions\, teashop
s\, taverns\, and temples to elicit\nwonder\, reverence\, puzzlement\, or
sometimes laughter from their\nconversation partners. As such\, they have
been much used by social and\ncultural historians to learn things about re
ligion\, about the\naccoutrements of daily life\, about social networking\
, and even about\nthe economy in China in these periods. The present talk
focuses on a\ndifferent issue: the uses of the word “belief” and allied no
tions\nin the two collections. I will argue that a stark difference in the
\nvalence of belief between the earlier and later collection suggests a\ns
urprisingly large change in underlying basic assumptions about how\nreliab
le knowledge is acquired and how the words of other people are\nto be hear
d and treated––a change perhaps meaningful enough to be\ncalled one of “wo
rld views.” The talk will present the evidence\nfor the change and propose
possible explanations lying in the place of\nreligion\, the nature of soc
ial elites\, and the rise of political\npartisanship across the two period
s. There will also be good ghost\ntales.\n \n\nFRIDAY\, APRIL 19\, 2024\nD
ILWORTH ROOM\n5:00 P.M. | WINE & CHEESE RECEPTION\n5:30 P.M. | TALK\n\n_TH
IS LECTURE IS SUPPORTED BY THE TANG RESEARCH FOUNDATION._\n\nPlease note:
\n\nThis registration is for the in-person event only. A video of the\nle
cture will be available after the event.\n\nTo register to receive the pos
t-event recording via email click HERE\n[https://www.ias.edu/form/post-lec
ture-video-recording-lnk].
DTSTART:20240419T213000Z
DTEND:20240419T213000Z
LAST-MODIFIED:20240320T183744Z
LOCATION:Dilworth Room
SUMMARY:Roger E. Covey Distinguished Lecture with Robert P. Hymes
URL:https://www.ias.edu/events/roger-e-covey-distinguished-lecture-robert-p
-hymes
END:VEVENT
BEGIN:VEVENT
UID:63356263-3263-4230-b761-316531323833
DTSTAMP:20240519T012345Z
CREATED:20240205T201351Z
DESCRIPTION:Topic: Additive Combinatorics Without Groups\n\nSpeakers: Huy T
uan Pham\n\nSubsets $A$ of an abelian group with a small doubling $|A+A|/|
A|$ have\nbeen extensively studied\, and results of Freiman\, Ruzsa and Gr
een give\nfundamental structural descriptions of such sets. These have imp
ortant\napplications across combinatorics and computer science\, and have
\nmotivated the development of a number of influential techniques. \n\nIn
this talk\, I will discuss a new combinatorial approach to several\nproble
ms involving sets with small doubling. \n\nOver abelian groups where all e
lements have order at most $r$\, the\nFreiman-Ruzsa theorem says that a se
t $A$ with $|A+A| \le K|A|$ is\ncontained in a subgroup of size at most $O
_{r\,K}(|A|)$\, and Ruzsa\nconjectured a tight dependence on $K$. In the f
irst application\, I\nwill discuss a short complete resolution of Ruzsa’s
conjecture. \n\nIn the second application\, we show that random functions
give good\nsumset extractors in general (possibly nonabelian) groups. \n\n
Surprisingly\, our approach is crucially motivated by purely\ncombinatoria
l graph-theoretic insights\, where we find that the group\nstructure is su
perfluous and can be replaced by much more general\ncombinatorial structur
es. In particular\, I will describe a further\ncorollary\, which is a comb
inatorial generalization of the\nFreiman-Ruzsa theorem over $\mathbb{F}_2^
n$. \n\nBased on joint work with David Conlon\, Jacob Fox and Liana\nYepre
myan.
DTSTART:20240422T150000Z
DTEND:20240422T160000Z
LAST-MODIFIED:20240502T191854Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-569
END:VEVENT
BEGIN:VEVENT
UID:34366638-3435-4737-a638-366435646162
DTSTAMP:20240519T012345Z
CREATED:20240122T152442Z
DESCRIPTION:Topic: The mass profiles of dwarf galaxies from Dark Energy Sur
vey lensing\n\nSpeakers: Joseph Thornton\n\nEach week\, we hold a relative
ly informal seminar/discussion series\nwith an emphasis on extra-galactic
and large-scale structure\nastrophysics.\n\nDuring Galread a leader/visito
r presents a recent paper to the\ndiscussion group. The PDF of the paper i
s projected onto a large\nscreen\, and a guest explains the paper\, sectio
n by section\, in greater\ndetail than may be explained within the text of
the article. To aid\nwith discussion\, only the article PDF is presented
-- no\npowerpoint-style slides. Galread discussions are very friendly and
\ninteractive.
DTSTART:20240422T150000Z
DTEND:20240422T160000Z
LAST-MODIFIED:20240419T202611Z
LOCATION:Zoom and Peyton Hall\, Grand Central
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-96
END:VEVENT
BEGIN:VEVENT
UID:66326330-3934-4266-a531-366566363039
DTSTAMP:20240519T012345Z
CREATED:20240122T151313Z
DESCRIPTION:Topic: General Discussion
DTSTART:20240422T160000Z
DTEND:20240422T170000Z
LAST-MODIFIED:20240419T195503Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-113
END:VEVENT
BEGIN:VEVENT
UID:35336239-3038-4864-b266-336464396363
DTSTAMP:20240519T012345Z
CREATED:20240112T155430Z
DESCRIPTION:Topic: Big Fiber Theorems\, Ideal-Valued Measures\, and Symplec
tic Topology\n\nSpeakers: Leonid Polterovich\n\nI will discuss an adaptati
on of Gromov's ideal-valued measures to\nsymplectic topology. It leads to
a unified viewpoint at three 'big\nfiber theorems': the Centerpoint Theore
m in combinatorial geometry\,\nthe Maximal Fiber Inequality in topology\,
and the Non-displaceable\nFiber Theorem in symplectic topology\, and yield
s applications to\nsymplectic rigidity. Joint work with Adi Dickstein\, Ya
niv Ganor\, and\nFrol Zapolsky.
DTSTART:20240422T163000Z
DTEND:20240422T174500Z
LAST-MODIFIED:20240422T112730Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Symplectic Geometry Seminar
URL:https://www.ias.edu/math/events/symplectic-geometry-seminar-19
END:VEVENT
BEGIN:VEVENT
UID:35653236-3537-4330-b463-393231346165
DTSTAMP:20240519T012345Z
CREATED:20240325T121727Z
DESCRIPTION:Topic: Algebraic K-Theory and P-Adic Arithmetic Geometry\n\nSpe
akers: Matthew Morrow\n\nTo any unital\, associative ring R one may associ
ate a family of\ninvariants known as its algebraic K-groups. Although they
are\nessentially constructed out of simple linear algebra data over the\n
ring\, they see an extraordinary range of information: depending on the\nr
ing\, its K-groups can be related to zeta functions\, corbordisms\,\nalgeb
raic cycles and the Hodge conjecture\, elliptic operators\,\nGrothendieck'
s theory of motives\, and so on.\n\nOur understanding of algebraic K-group
s\, at least as far as they\nappear in algebraic and arithmetic geometry\,
has rapidly improved in\nthe past few years. This talk will present some
of the fundamentals of\nthe subject and explain why K-groups are related t
o the ongoing\nspecial year in p-adic Arithmetic Geometry. The intended au
dience is\nnon-specialists
DTSTART:20240422T180000Z
DTEND:20240422T190000Z
LAST-MODIFIED:20240422T112851Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Members' Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-66
END:VEVENT
BEGIN:VEVENT
UID:38663261-3839-4135-a565-373865613930
DTSTAMP:20240519T012345Z
CREATED:20231206T182326Z
DESCRIPTION:Topic: Pointwise Good Reduction Criteria for Local Systems\n\nS
peakers: Ziquan Yang\n\nLet S be a connected smooth rigid analytic variety
over a p-adic field\nK and let T be a p-adic local system over S. A celeb
rated theorem of\nLiu and Zhu says that if V is de Rham at one classical p
oint\, then V\nis globally de Rham. When S has good reduction over O_K\, o
ne naturally\nasks about analogous statements when we replace 'de Rham' by
\n'crystalline' or 'semistable'. It is well known that the naive\nanalogue
s are false. \n\nIn an ongoing joint work with Haoyang Guo (with many cont
ributions by\nSasha Petrov)\, we prove that Liu-Zhu's result can be remedi
ed if one\ntests at 'sufficiently many' points\, when we choose a good int
egral\nmodel for S. In particular\, if V is crystalline or semistable at e
very\nclassical point\, then it is crystalline or semistable relative to t
he\nchosen integral model. As a direct consequence\, the notion of\ncrysta
llinity or semistability of V depends only on the rigid analytic\nvariety
S and not on the choice of a good model (provided that there\nexists one).
I will also discuss the l-adic analogue of this result as\nwell as its re
lation to purity statements. If time permits\, I will\ndiscuss some specul
ations yet to be affirmed.
DTSTART:20240422T193000Z
DTEND:20240422T203000Z
LAST-MODIFIED:20240417T165136Z
LOCATION:Fine 322\, Princeton University
SUMMARY:Joint IAS/Princeton Arithmetic Geometry Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-arithmetic-geometry-
seminar-22
END:VEVENT
BEGIN:VEVENT
UID:64323338-6430-4235-b963-356434326335
DTSTAMP:20240519T012345Z
CREATED:20240205T201531Z
DESCRIPTION:Topic: Random Cayley Graphs From a Combinatorial Perspective \n
\nSpeakers: Huy Tuan Pham\n\nCayley graphs provide interesting bridges bet
ween graph theory\,\nadditive combinatorics and group theory. Fixing an am
bient finite\ngroup\, random Cayley graphs are constructed by choosing a g
enerating\nset at random. These graphs reflect interesting symmetries and
\nproperties of the group\, at the cost of inducing complex\ndependencies.
\n\nI will discuss several results on clique and independence numbers of
\nrandom Cayley graphs in general groups\, progress towards a conjecture\n
of Alon on existence of Ramsey Cayley graphs\, and a proof of a\nconjectur
e of Alon and Orlitsky. These questions are naturally\nconnected with some
fundamental problems in additive combinatorics.\nSurprisingly\, our insig
hts suggest that in many of these problems\, the\ngroup structure is super
fluous and can be replaced by much more\ngeneral combinatorial structures.
\n\nI will discuss the main general combinatorial models and ideas behind
\nthese results. I will also discuss how they relate to the additive\ncomb
inatorial corollaries discussed in Monday’s talk. \n\nBased on joint work
with David Conlon\, Jacob Fox and Liana\nYepremyan.
DTSTART:20240423T143000Z
DTEND:20240423T163000Z
LAST-MODIFIED:20240502T191816Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-560
END:VEVENT
BEGIN:VEVENT
UID:61313931-6432-4134-b436-326265363163
DTSTAMP:20240519T012345Z
CREATED:20240122T154525Z
DESCRIPTION:The Bahcall Lunch follows the astrophysics colloquium lecture.
DTSTART:20240423T163000Z
DTEND:20240423T173000Z
LAST-MODIFIED:20240122T154524Z
LOCATION:Lewis Library\, Princeton University
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-71
END:VEVENT
BEGIN:VEVENT
UID:65326131-3331-4563-b862-323831363935
DTSTAMP:20240519T012345Z
CREATED:20240122T161517Z
DESCRIPTION:Topic: Journal Club
DTSTART:20240423T200000Z
DTEND:20240423T210000Z
LAST-MODIFIED:20240419T200149Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Princeton University Computational Astrophysics Club
URL:https://www.ias.edu/sns/events/princeton-university-computational-astro
physics-club-35
END:VEVENT
BEGIN:VEVENT
UID:35373439-6533-4163-a136-656133323432
DTSTAMP:20240519T012345Z
CREATED:20240130T154101Z
DESCRIPTION:Topic: The Hecke Action\n\nSpeakers: Dmitry Kubrak
DTSTART:20240425T140000Z
DTEND:20240425T160000Z
LAST-MODIFIED:20240503T193219Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Learning Seminar
URL:https://www.ias.edu/math/events/special-year-learning-seminar-33
END:VEVENT
BEGIN:VEVENT
UID:30303738-6638-4031-b339-366462366466
DTSTAMP:20240519T012345Z
CREATED:20240122T165047Z
DESCRIPTION:Topic: Micromirror confinement of sub-TeV cosmic rays in galaxy
clusters \n\nSpeakers: Patrick Reichherzer\n\nRecent observations reveal
that cosmic rays (CRs) are more tightly\nconfined in various astrophysical
systems (e.g. radio bubbles) than\ncurrent theories predict. I show that
microscale magnetic\nfluctuations\, particularly from the mirror instabili
ty\, significantly\ninfluence CR transport. Our theory is supported by sim
ulations of CRs\nin the intracluster medium (ICM) of galaxy clusters. Our
results\nindicate that sub-TeV CR confinement in the ICM is much more effi
cient\nthan previously thought based on extrapolating existing\nGalactic-t
ransport theories.
DTSTART:20240425T150000Z
DTEND:20240425T160000Z
LAST-MODIFIED:20240415T124302Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-97
END:VEVENT
BEGIN:VEVENT
UID:63643337-6461-4637-b330-666432623033
DTSTAMP:20240519T012345Z
CREATED:20240213T144722Z
DESCRIPTION:Topic: What is stochastic quantization?\n\nSpeakers: Bjoern Bri
ngmann
DTSTART:20240425T170000Z
DTEND:20240425T180000Z
LAST-MODIFIED:20240417T184656Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-28
END:VEVENT
BEGIN:VEVENT
UID:30633064-3363-4936-a366-366463323062
DTSTAMP:20240519T012345Z
CREATED:20231204T181824Z
DESCRIPTION:Topic: Higher Congruences For Modular Forms and Zeta Elements\n
\nSpeakers: Eric Urban\n\nIn a recent joint work with S. Iyengar\, C. Khar
e and J. Manning\, we\nuse their notion of congruence modules in higher co
dimension to give a\nnew construction of the bottom class of the rank d=[F
:\Q] Euler system\nattached to nearly ordinary Hilbert modular forms for a
totally real\nfield F that I constructed a few years ago. In this talk\,
I will\ndiscuss the non ordinary case for elliptic cusp forms and the\ncon
struction of Zeta elements in the exterior square of the Galois\ncohomolog
y for adjoint modular Galois representations.
DTSTART:20240425T203000Z
DTEND:20240425T213000Z
LAST-MODIFIED:20240422T140822Z
LOCATION:*Princeton University\, Fine 214*
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-24
END:VEVENT
BEGIN:VEVENT
UID:37643336-3566-4335-b730-663866346437
DTSTAMP:20240519T012345Z
CREATED:20240404T171815Z
DESCRIPTION:Topic: Grothendieck-Riemann-Roch\, Part I\n\nSpeakers: Vadim Vo
logodsky\n\nExplain the formulation of the Grothendieck–Riemann–Roch theor
em\nfor analytic adic spaces: go through [And23\, pp. 32-38] and define al
l\nrelevant objects and maps. Before explaining the construction of the\nC
hern class map\, define the sheaf KU∧p on analytic adic spaces and\nidenti
fy it with LK(1)K(−) as in [And23\, Satz 5.15] (see also the\npreceding di
scussion therein and [BCM20\, Section 3])\; in particular\,\nstate the Efi
mov continuity theorem. Finish by constructing the Chern\nclass map using
[And23\, Satz 6.12] (do not prove it!).
DTSTART:20240426T183000Z
DTEND:20240426T203000Z
LAST-MODIFIED:20240404T171924Z
LOCATION:Princeton University\, Fine Hall 314
SUMMARY:Condensed Learning Seminar
URL:https://www.ias.edu/math/events/condensed-learning-seminar-21
END:VEVENT
BEGIN:VEVENT
UID:66663434-3664-4338-b762-363465366336
DTSTAMP:20240519T012345Z
CREATED:20240212T154359Z
DESCRIPTION:Topic: Lower Bounds for Set-Multilinear Branching Programs\n\nS
peakers: Shubhangi Saraf\n\nIn this talk\, I will discuss lower bounds for
a certain\nset-multilinear restriction of algebraic branching programs. T
he\nsignificance of the lower bound and the model is underscored by the\nr
ecent work of Bhargav\, Dwivedi\, and Saxena (2023)\, which showed that\ns
uper-polynomial lower bounds for the model of sum of ordered set\nmultilin
ear ABPs -- when the underlying polynomial of sufficiently low\ndegree --
would imply super-polynomial lower bounds against general\nABPs\, thereby
resolving Valiant's longstanding conjecture that the\npermanent polynomial
cannot be computed efficiently by ABPs. We will\ndiscuss a recent result
which 'almost' meets this low-degree demand.\n\nThis is based on joint wor
k with Prerona Chatterjee\, Deepanshu Kush\nand Amir Shpilka.
DTSTART:20240429T150000Z
DTEND:20240429T160000Z
LAST-MODIFIED:20240502T191719Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-570
END:VEVENT
BEGIN:VEVENT
UID:65323033-6261-4630-b963-376462663836
DTSTAMP:20240519T012345Z
CREATED:20240122T151331Z
DESCRIPTION:Topic: General Discussion
DTSTART:20240429T160000Z
DTEND:20240429T170000Z
LAST-MODIFIED:20240429T123346Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-114
END:VEVENT
BEGIN:VEVENT
UID:35626338-3036-4136-a464-366432663236
DTSTAMP:20240519T012345Z
CREATED:20240426T205106Z
DESCRIPTION:Topic: DESI 2024 Y1 BAO results in-depth\, and an accompanying
discussion. \n\nSpeakers: Shi-Fan Chen
DTSTART:20240429T163000Z
DTEND:20240429T180000Z
LAST-MODIFIED:20240426T205205Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/sns/events/institute-advanced-studyprinceton-univer
sity-early-universecosmology-lunch-discussion-78
END:VEVENT
BEGIN:VEVENT
UID:38346332-6561-4361-a365-663233383835
DTSTAMP:20240519T012345Z
CREATED:20240325T121751Z
DESCRIPTION:Topic: Triangulated Surfaces in Moduli Space\n\nSpeakers: Sahan
a Vasudevan\n\nTriangulated surfaces are Riemann surfaces formed by gluing
together\nequilateral triangles. They are also the Riemann surfaces defin
ed over\nthe algebraic numbers. Brooks\, Makover\, Mirzakhani and many oth
ers\nproved results about the geometric properties of random large genus\n
triangulated surfaces\, and similar results about the geometric\npropertie
s of random large genus hyperbolic surfaces. These results\nmotivated the
question: how are triangulated surfaces distributed in\nthe moduli space o
f Riemann surfaces\, quantitatively? I will talk\nabout results related to
this question.
DTSTART:20240429T180000Z
DTEND:20240429T190000Z
LAST-MODIFIED:20240429T130651Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Members' Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-67
END:VEVENT
BEGIN:VEVENT
UID:31363934-6335-4431-a565-383632323263
DTSTAMP:20240519T012345Z
CREATED:20231206T182354Z
DESCRIPTION:Topic: Microlocal Sheaves and Aﬃne Springer Fibers\n\nSpeakers:
Pablo Boixeda Alvarez\n\nThe resolutions of Slodowy slices $\tilde{S}_{e}
$ are symplectic\nvarieties that contain the Springer fiber $(G/B)_{e}$ as
a Lagrangian\nsubvariety. In joint work with R. Bezrukavnikov\, M. McBree
n and Z.\nYun\, we construct analogues of these spaces for homogeneous aff
ine\nSpringer fibers. We further understand the categories of microlocal\n
sheaves in these symplectic spaces supported on the affine Springer\nfiber
as some categories of coherent sheaves. In this talk I will\nmostly focus
on the case of the homogeneous element ts𝑡𝑠 for\ns𝑠 a regular semisimple
element and will discuss some relations of\nthese categories with the smal
l quantum group providing a\ncategorification of joint work with R.Bezruka
vnikov\, P. Shan and E.\nVasserot. If I have time I will then mention some
recent application\nof this result to the Breuil-Mezard conjecture by T.
Feng and B. Le\nHung.
DTSTART:20240429T193000Z
DTEND:20240429T203000Z
LAST-MODIFIED:20240426T191555Z
LOCATION:Fine 322\, Princeton University
SUMMARY:Joint IAS/Princeton Arithmetic Geometry Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-arithmetic-geometry-
seminar-23
END:VEVENT
BEGIN:VEVENT
UID:35373466-6662-4564-a330-383035346462
DTSTAMP:20240519T012345Z
CREATED:20240314T154957Z
DESCRIPTION:Topic: Incidence Bounds via Extremal Graph Theory\n\nSpeakers:
Istvan Tomon\n\nA cornerstone result in geometry is the Szemerédi–Trotter
theorem\,\nwhich gives a sharp bound on the maximum number of incidences b
etween\n$m$ points and $n$ lines in the real plane. A natural generalizati
on\nof this is to consider point-hyperplane incidences in higher\ndimensio
ns. As proposed by Chazelle in the 90's\, we are interested in\nthe maximu
m number of incidences between $m$ points and $n$\nhyperplanes\, assuming
no $s$ points lie in the intersection of $s$\nhyperplanes. The latter cond
ition is needed to\navoid trivialities\, like all hyperplanes intersecting
in a\nline\, and all points contained in this line. Starting from dimensi
on\n3\, matching lower and upper bounds are no longer known for this\nprob
lem. I will talk about how to prove sharp bounds over arbitrary\nfields us
ing methods from extremal graph theory\, and discuss\nanalogues of this pr
oblem concerning point-variety incidences and\nunit distance graphs.\n\nBa
sed on a joint work with Aleksa Milojević and Benny Sudakov.
DTSTART:20240430T143000Z
DTEND:20240430T163000Z
LAST-MODIFIED:20240502T191655Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-565
END:VEVENT
BEGIN:VEVENT
UID:39643735-3165-4562-a533-363935643834
DTSTAMP:20240519T012345Z
CREATED:20240122T154549Z
DESCRIPTION:The Bahcall Lunch follows the astrophysics colloquium lecture.
DTSTART:20240430T163000Z
DTEND:20240430T173000Z
LAST-MODIFIED:20240122T154547Z
LOCATION:Lewis Library\, Princeton University
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-72
END:VEVENT
BEGIN:VEVENT
UID:62316630-3734-4365-b465-353538336363
DTSTAMP:20240519T012345Z
CREATED:20240122T161534Z
DESCRIPTION:Topic: Journal Club
DTSTART:20240430T200000Z
DTEND:20240430T210000Z
LAST-MODIFIED:20240426T204848Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Princeton University Computational Astrophysics Club
URL:https://www.ias.edu/sns/events/princeton-university-computational-astro
physics-club-36
END:VEVENT
BEGIN:VEVENT
UID:35643235-3935-4430-b265-386536666165
DTSTAMP:20240519T012345Z
CREATED:20240122T165123Z
DESCRIPTION:Topic: Testing Galaxy Formation Models with Large-scale Surveys
of the Milky Way Stellar Halo\n\nSpeakers: Emily Cunningham\n\nWhile the
vast majority of the light from our galaxy comes from the\nGalactic disk\,
the vast majority of the mass of the Milky Way (MW) is\nin its dark matte
r halo. Because we cannot directly observe the MW's\ndark matter halo\, we
must use luminous tracer populations (i.e.\,\nstars) to study the mass di
stribution indirectly. Fortunately\, there\nare stars strewn throughout th
e MW's dark matter halo. We believe the\nMW built up its halo of dark matt
er over cosmic time by consuming\nsmaller dwarf galaxies\; the remnants of
these dwarf galaxies make up\nthe MW's stellar halo. Halo stars can there
fore be used both to\nconstrain the dark matter distribution of the MW as
well as inform us\nabout the dwarf galaxies in which they formed. I will p
resent my\nongoing theoretical and observational work using halo stars to
map the\ndark matter distribution and disequilibrium in the MW\, as well a
s\nstudy the faint\, low-mass galaxies that were consumed by the MW during
\nits formation. I will discuss the crucial roles of current and\nupcoming
large-scale surveys of the MW halo (such as the Rubin\nObservatory Legacy
Survey of Space and Time) for addressing\nfundamental questions in galaxy
formation.
DTSTART:20240502T150000Z
DTEND:20240502T160000Z
LAST-MODIFIED:20240426T205247Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-98
END:VEVENT
BEGIN:VEVENT
UID:35663937-6131-4736-a362-323332613238
DTSTAMP:20240519T012345Z
CREATED:20240213T144904Z
DESCRIPTION:Topic: What are rational and Du Bois singularities? \n\nSpeaker
s: Wanchun Shen\n\nWe give a gentle introduction to rational and Du Bois s
ingularities in\nalgebraic geometry. Through examples\, we will see how bi
rational\ngeometry comes into play with the theory of differential operato
rs.\nTime permitting\, we discuss the sheaf-theoretic constructions behind
\nthese connections\, based on Saito's theory of mixed Hodge modules.
DTSTART:20240502T170000Z
DTEND:20240502T180000Z
LAST-MODIFIED:20240426T122051Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-29
END:VEVENT
BEGIN:VEVENT
UID:36333533-3537-4563-a365-373734386331
DTSTAMP:20240519T012345Z
CREATED:20240429T124736Z
DESCRIPTION:Topic: Weak lensing with a billion galaxies: new opportunities\
, challenges and strategies\n\nSpeakers: Alex Amon (Princeton)\n\nWeak gra
vitational lensing provides an immense opportunity to test the\nstandard c
osmological model and to probe astrophysics. Over the last\ndecade\, it ha
s matured as a high-precision tool with on-going surveys\nlike the Dark En
ergy Survey\, which has imaged 5000 sq degrees and 100M\ngalaxies. Intrigu
ingly\, weak lensing surveys have consistently\nreported a mild cosmologic
al tension: low values of the clustering\namplitude parameter (S_8) comp
ared to that predicted by Planck\nprimary Cosmic Microwave Background. In
this talk\, I will highlight\nthe unique potential of lensing to test of t
he non-linear regime of\nthe cosmological model\, to constrain baryonic e
ffects like AGN\nfeedback\, and to measure the halo masses of galaxies . O
n the eve of\nRubin Observatory’s Legacy Survey of Space and Time (LSST)\,
which\nwill measure weak lensing with billions of galaxies\, the challeng
e is\nclear: systematics must be controlled to make the most of the next\n
epic decade of data. I will present on-going efforts to calibrate\nobserva
tions\, in particular\, the photometric redshifts of the galaxy\nsample\,
and to understand and mitigate astrophysical systematic\neffects. Finally
\, I will demonstrate new approaches for testing the\nscale-dependence of
cosmological observations\, understanding baryonic\nfeedback\, and measuri
ng the masses of dwarf galaxies using lensing\ndata in tandem with spectro
scopic surveys like the Dark Energy\nSpectroscopic Instrument (DESI).
DTSTART:20240502T180000Z
DTEND:20240502T190000Z
LAST-MODIFIED:20240429T124916Z
LOCATION:Serin Hall Rm W330\, Rutgers and Zoom
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
39
END:VEVENT
BEGIN:VEVENT
UID:36323935-6232-4164-a130-663161616632
DTSTAMP:20240519T012345Z
CREATED:20231204T181847Z
DESCRIPTION:Topic: Relative Langlands and Endoscopy\n\nSpeakers: Spencer Le
slie\n\nSpherical varieties play an important role in the study of periods
of\nautomorphic forms. But very closely related varieties can lead to ver
y\ndistinct arithmetic problems. Motivated by applications to\nrelative tr
ace formulas\, we discuss the natural question of\ndistinguishing differen
t forms of a given spherical variety in\narithmetic settings\, giving a so
lution for symmetric varieties. It\nturns out that the answer is intimatel
y connected with the\nconstruction of the dual Hamiltonian variety associa
ted with the\nsymmetric variety by Ben-Zvi\, Sakellaridis\, and Venkatesh.
I will\nexplain the source of these questions in the theory of endoscopy
for\nsymmetric varieties\, with application to the (pre-)stabilization of
\nrelative trace formulas.
DTSTART:20240502T203000Z
DTEND:20240502T213000Z
LAST-MODIFIED:20240429T172602Z
LOCATION:*Princeton University\, Fine 214*
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-21
END:VEVENT
BEGIN:VEVENT
UID:36383538-6339-4366-b365-363837373039
DTSTAMP:20240519T012345Z
CREATED:20240410T192036Z
DESCRIPTION:Topic: Symplectic Structures from Almost Symplectic Structures
\n\nSpeakers: Agustin Moreno\n\nIn this talk\, we will consider a stabili
zed version of the fundamental\nexistence problem of symplectic structures
(cf. Open Problem 1 in\nMcDuff & Salamon). Given a formal symplectic mani
fold\, i.e. a closed\nmanifold $M$ with a non-degenerate 2-form and a non-
degenerate second\ncohomology class\, we investigate when its natural stab
ilization to $M$\n$ \times$ $T^2 $ can be realized by a symplectic form.\n
We show that this can be done whenever the formal symplectic manifold\nadm
its a positive symplectic divisor. It follows that if a formal\nsymplectic
4-manifold\, which either satisfies that its\npositive/negative second be
tti numbers are both at least 2\, or that is\nsimply connected\, then $ M$
$ \times$ $T^2 $ is symplectic.\nThis is joint work with Fabio Gironella\
, Fran Presas\, Lauran\nTouissant.
DTSTART:20240503T131500Z
DTEND:20240503T144500Z
LAST-MODIFIED:20240503T115405Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-158
END:VEVENT
BEGIN:VEVENT
UID:64643937-3233-4036-b164-323735643139
DTSTAMP:20240519T012345Z
CREATED:20240426T205425Z
DESCRIPTION:Topic: Simulating Supermassive Black Holes Feeding and Feedback
at the Meso-scale\n\nSpeakers: Trung Ha\n\nSupermassive black holes' (SMB
Hs) feeding and feedback cycles play a\nvital role in galaxy formation and
evolution. While current\nstate-of-the-art numerical simulations can succ
essfully reproduce the\nmultiphase gas at the galaxy-scale\, it is not wel
l understood how this\nmultiphase gas is connected to the gas at the accre
tion-disk-scale.\nSuch an understanding is crucial for setting up general-
relativistic\nmagneto-hydrodynamical (GRMHD) simulations of the accretion
disk. Our\nwork bridges this gap by providing theoretical explanations for
the\nmeso-scale accretion flows and their implications for galaxy\nevolut
ion. To achieve this goal\, we employ (M)HD simulations with\nAthena++\, m
otivated by observations of the elliptical galaxy M87 at\nthe center of th
e Virgo cluster. Our galaxy-scale simulations include\nan active-galactic-
nuclei (AGN) jet feedback prescription that\nbalances cooling on large sca
le. Then\, we utilize a nested zoom-in\ntechnique to construct meso-scale
simulations of the central parsecs\nof the galaxy\, and model the dynamica
l evolution of multiphase\naccretion flow at this scale. These simulations
ultimately provide\nboundary and initial conditions for future GRMHD simu
lations of the\naccretion disk at the horizon-scale\, which can be directl
y compared to\nobservations made with the Event Horizon Telescope. This wo
rk aims to\nimprove our understanding of SMBH feeding\, AGN jet feedback a
nd their\nimpact on galaxy evolution\, and also to inform physically motiv
ated\nsub-grid models in large-scale simulations.
DTSTART:20240503T163000Z
DTEND:20240503T173000Z
LAST-MODIFIED:20240426T205533Z
LOCATION:Dome Room\, Peyton Hall or Zoom
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-70
END:VEVENT
BEGIN:VEVENT
UID:37623930-3334-4638-b061-386334663965
DTSTAMP:20240519T012345Z
CREATED:20240430T121248Z
DESCRIPTION:Topic: Stellar-Dark matter halo mass relationship in UDS+COSMOS
\n\nSpeakers: Kumail Zaidi (Tufts)\n\nI present the evolution of the relat
ionship between galaxy stellar\nmass and their host dark matter halo mass
since the Universe was only\nabout a billion years old (z ~ 5) until today
. The galaxy-halo mass\nrelationship was constrained through the measureme
nts of two-point\nclustering of galaxies and stellar mass functions in the
UDS and\nCOSMOS fields in concert with Halo Occupation Distribution (HOD)
\nmodeling. The use of two large fields covering an effective area of\n~1.
6 square degrees was vital in lowering the measurement\nuncertainties due
to cosmic variance. On the other hand\, I test\nvarious novel redshift evo
lution schemes for the HOD model which\nallows tracing a continuous evolut
ion of stellar-halo mass\nrelationship (SHMR) out to z~5. But even more im
portantly\, it allows\nfor the constraining of the SHMR at high redshift w
here the data is\nnot as strongly constraining as it is at low redshift. T
his study\nconfirms the consensus in the literature that the efficiency of
dark\nmatter halos in converting baryons into stellar mass peaks at ~20%\
, at\na halo mass of ~10^12 M⊙\, out to z~5. Furthermore\, from the\nresul
ting SHMR evolution\, I also show how the role of Active Galactic\nNuclei
(AGN) feedback\, in suppressing star formation\, evolves with\ntime. This
is highly illuminating for the simulations.
DTSTART:20240503T180000Z
DTEND:20240503T190000Z
LAST-MODIFIED:20240430T121537Z
LOCATION:Broadmead 102
SUMMARY:Princeton University Survey Science Discussion
URL:https://www.ias.edu/sns/events/princeton-university-survey-science-disc
ussion-8
END:VEVENT
BEGIN:VEVENT
UID:39623535-3364-4966-a233-303466653636
DTSTAMP:20240519T012345Z
CREATED:20240207T145738Z
DESCRIPTION:Topic: Some Analytic Applications of the Polynomial Method\n\nS
peakers: Bodan Arsovski\n\nThis talk will be about the polynomial method a
nd its applications to\nquestions that have traditionally been tackled by
Fourier analysis\,\nwith emphasis on the Kakeya conjecture\, the cap set p
roblem\,\narithmetic progressions in dense sets\, and the Katz-Tao arithme
tic\nKakeya conjecture which connects the three together.
DTSTART:20240503T183000Z
DTEND:20240503T193000Z
LAST-MODIFIED:20240503T181425Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Analysis and Mathematical Physics
URL:https://www.ias.edu/math/events/analysis-and-mathematical-physics-29
END:VEVENT
BEGIN:VEVENT
UID:61336164-3132-4163-b039-316134346635
DTSTAMP:20240519T012345Z
CREATED:20240404T171930Z
DESCRIPTION:Topic: Grothendieck-Riemann-Roch\, Part II\n\nSpeakers: Dmitry
Kubrak\n\nProve the Grothendieck–Riemann–Roch theorem: first prove [And23\
,\nSatz 6.12] and then explain the sketch of the proof on [And23\, p. 38]
\nby proving the relevant statements from the second half of [CS22\,\nLect
ure 15].
DTSTART:20240503T183000Z
DTEND:20240503T203000Z
LAST-MODIFIED:20240430T120511Z
LOCATION:Princeton University\, Fine 214
SUMMARY:Condensed Learning Seminar
URL:https://www.ias.edu/math/events/condensed-learning-seminar-22
END:VEVENT
BEGIN:VEVENT
UID:64333634-3663-4234-b165-366237326233
DTSTAMP:20240519T012345Z
CREATED:20240415T143807Z
DESCRIPTION: \nDIRECTOR'S CONVERSATION: _THE POWER OF SONG: CREATION\, EMBO
DIMENT\,\nEFFECT_\nFRIDAY\, MAY 3\, 2024\, 5:00 P.M.\nWOLFENSOHN HALL \n\n
Join IAS Director David Nirenberg in conversation with mezzo-soprano\nJoy
ce DiDonato on topics ranging from female authors in opera to the\nfuture
of the arts. A master class with rising star Jeysla Rosario\nSantos and co
llaborative artist Justina Lee will be followed by\naudience Q&A.\n\n_THIS
EVENT IS AT CAPACITY AND WILL BE LIVESTREAMED TO OVERFLOW\nAUDIENCE._\n\n
DTSTART:20240503T210000Z
DTEND:20240503T210000Z
LAST-MODIFIED:20240503T142755Z
LOCATION:Wolfensohn Hall
SUMMARY:Director's Conversation: The Power of Song: Creation\, Embodiment\,
Effect
URL:https://www.ias.edu/events/directors-conversation-power-song-creation-e
mbodiment-effect
END:VEVENT
BEGIN:VEVENT
UID:39393731-6434-4536-a164-666637346136
DTSTAMP:20240519T012345Z
CREATED:20240503T120248Z
DESCRIPTION:Topic: Rounding Large Independent Sets on Expanders\n\nSpeakers
: Tim Hsieh\n\nIn this talk\, we will present a new approach for approxima
ting large\nindependent sets when the input graph is a one-sided expander—
that\nis\, the uniform random walk matrix of the graph has second eigenval
ue\nbounded away from 1. Specifically\, we show a polynomial time algorith
m\nthat can find linear-sized independent sets in one-sided expanders\ntha
t are almost $3$-colorable or promised to contain a $0.499n$-sized\nindepe
ndent set.\n\nAll prior algorithms that beat the worst-case guarantees for
the\nproblem rely on bottom eigenspace enumeration techniques\, which bui
ld\non a classical work of Alon and Kahale and require two-sided expansion
\n(i.e.\, bounded number of negative eigenvalues of magnitude close to\n1)
. Such techniques provably fail in our setting because in contrast\nto bot
tom eigenspace enumeration that naturally extends to\n$k$-colorable graphs
for any fixed constant $k$\, we observe that\nfinding linear-sized indepe
ndent sets in almost $4$-colorable\nexpanding graphs (as opposed to almost
$3$-colorable graphs in our\nalgorithmic result above) is NP-hard assumin
g the Unique Games\nConjecture.\n\nOur algorithms rely on a new framework
for rounding sum-of-squares\nrelaxations of the independent set problem ba
sed on a combinatorial\napproximate packing property—in any graph that sat
isfies one-sided\nspectral expansion (in fact\, a weaker vertex expansion
property\nsuffices)\, the total number of large independent sets with smal
l\npairwise intersections is small.\n\nBased on joint work with Mitali Baf
na and Pravesh K. Kothari.
DTSTART:20240506T150000Z
DTEND:20240506T160000Z
LAST-MODIFIED:20240507T175221Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-574
END:VEVENT
BEGIN:VEVENT
UID:33356236-3065-4938-a538-643736313638
DTSTAMP:20240519T012345Z
CREATED:20240122T151349Z
DESCRIPTION:Topic: No planet is an island: insights from planets’ interacti
ons with their environments\n\nSpeakers: Janosz Dewberry (CITA)\n\nGas gia
nt planets’ deep internal structures and basic properties\nremain uncertai
n\, even in our own solar system. Fortunately\, the\ninteractions of plane
ts with their environments offer complementary\ninsight to direct observat
ions. I will describe how the gravitational\ninteraction of Saturn with it
s rings can help us understand the\nplanet’s internal structure and rotati
on state. The tidal\ninteractions of Saturn and Jupiter with their satelli
te moons also\npromise insight into the intrinsic properties of giant plan
ets.\nMeanwhile\, the tidal interactions of extrasolar planets with their
\nhost stars leave traces in exoplanet population data. Lastly\, I will\ni
ntroduce new results demonstrating that a novel tidal effect can\ninhibit
the process of spin (pseudo-)synchronization that has\nhistorically been e
xpected to occur rapidly in eccentric systems.
DTSTART:20240506T160000Z
DTEND:20240506T170000Z
LAST-MODIFIED:20240503T160935Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-115
END:VEVENT
BEGIN:VEVENT
UID:36346465-3262-4965-b634-383937623436
DTSTAMP:20240519T012345Z
CREATED:20240305T152144Z
DESCRIPTION:Topic: Symplectic Aspects of the Hilbert-Smith Conjecture and $
p$-adic Actions.\n\nSpeakers: Egor Shelukhin\n\nI will discuss a recent pr
oof of new cases of the Hilbert-Smith\nconjecture for actions by homeomorp
hisms of symplectic nature. In\nparticular\, it rules out faithful actions
of the additive $p$-adic\ngroup in this setting and provides further obst
ructions to group\nactions in symplectic topology. The proof relies on a n
ew approach to\nthis circle of questions combined with power operations in
Floer\ncohomology and quantitative symplectic topology.
DTSTART:20240506T163000Z
DTEND:20240506T174500Z
LAST-MODIFIED:20240506T130527Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Symplectic Geometry Seminar
URL:https://www.ias.edu/math/events/symplectic-geometry-seminar-22
END:VEVENT
BEGIN:VEVENT
UID:34346263-3563-4865-a334-323964333562
DTSTAMP:20240519T012345Z
CREATED:20240326T140749Z
DESCRIPTION:Topic: The Geometric Langlands Conjecture\n\nSpeakers: Sam Rask
in\n\nI will describe the main ideas that go into the proof of the\n(unram
ified\, global) geometric Langlands conjecture. All of this work\nis joint
with Gaitsgory and some parts are joint with Arinkin\,\nBeraldo\, Chen\,
Faergeman\, Lin\, and Rozenblyum. I will also describe\nrecent work on und
erstanding the structure of Hecke eigensheaves\n(where the attributions ar
e varied and too complicated for an\nabstract).
DTSTART:20240506T193000Z
DTEND:20240506T203000Z
LAST-MODIFIED:20240506T131009Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Joint IAS/Princeton Arithmetic Geometry Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-arithmetic-geometry-
seminar-19
END:VEVENT
BEGIN:VEVENT
UID:65326464-6266-4830-b662-656536363534
DTSTAMP:20240519T012345Z
CREATED:20240122T161554Z
DESCRIPTION:Topic: Journal Club
DTSTART:20240507T200000Z
DTEND:20240507T210000Z
LAST-MODIFIED:20240503T161434Z
LOCATION:Peyton Hall\, Grand Central
SUMMARY:Princeton University Computational Astrophysics Club
URL:https://www.ias.edu/sns/events/princeton-university-computational-astro
physics-club-37
END:VEVENT
BEGIN:VEVENT
UID:37353830-3239-4036-b830-623933363434
DTSTAMP:20240519T012345Z
CREATED:20240322T175928Z
DESCRIPTION:Topic: What is a Translation Surface?\n\nSpeakers: Sahana Vasud
evan
DTSTART:20240509T170000Z
DTEND:20240509T180000Z
LAST-MODIFIED:20240503T132933Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-31
END:VEVENT
BEGIN:VEVENT
UID:30303837-6436-4633-b231-366364643062
DTSTAMP:20240519T012345Z
CREATED:20231204T165425Z
DESCRIPTION:Topic: Derived Hecke Action For Weight One Modular Forms Via Cl
assicality\n\nSpeakers: Gyujin Oh\n\nIt is known that a p-adic family of m
odular forms does not necessarily\nspecialize into a classical modular for
m at weight one\, unlike the\nmodular forms of weight 2 or higher. We will
explain how this\nobstruction to classicality leads to a 'derived' action
on modular\nforms of weight one\, which can be understood as the so-calle
d derived\nHecke operator at p. We will also investigate the role of the d
erived\naction in the study of p-adic periods of the adjoint of the weight
one\nmodular forms.
DTSTART:20240509T193000Z
DTEND:20240509T203000Z
LAST-MODIFIED:20240508T125235Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Joint PU/IAS Number Theory
URL:https://www.ias.edu/math/events/joint-puias-number-theory-18
END:VEVENT
BEGIN:VEVENT
UID:38313034-3263-4661-b834-333139656133
DTSTAMP:20240519T012345Z
CREATED:20240112T152129Z
DESCRIPTION:Topic: Invariant Sets and Hyperbolic Periodic Orbits\n\nSpeaker
s: Viktor Ginzburg\n\nThe presence of hyperbolic periodic orbits or invari
ant sets often has\nan affect on the global behavior of a dynamical system
. In this talk\nwe discuss two theorems along the lines of this phenomenon
\, extending\nsome properties of Hamiltonian diffeomorphisms to dynamicall
y convex\nReeb flows on the sphere in all dimensions. The first one\,\ncom
plementing other multiplicity results for Reeb flows\, is that the\nexiste
nce of a hyperbolic periodic orbit forces the flow to have\ninfinitely man
y periodic orbits. This result can be thought of as a\nstep towards Franks
’ theorem for Reeb flows. The second result is a\ncontact analogue of the
higher-dimensional Le Calvez-Yoccoz theorem\nproved by the speaker and Gur
el and asserting that no periodic orbit\nof a Hamiltonian pseudo-rotation
is locally maximal. The talk is based\non a joint work with Erman Cineli\,
Basak Gurel and Marco Mazzucchelli.
DTSTART:20240510T131500Z
DTEND:20240510T144500Z
LAST-MODIFIED:20240510T130127Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-148
END:VEVENT
BEGIN:VEVENT
UID:32666361-6633-4464-b230-353838636438
DTSTAMP:20240519T012345Z
CREATED:20240207T145803Z
DESCRIPTION:Topic: Supersymmetric Approach to the Analysis of Random Band M
atrices\n\nSpeakers: Mariya Shcherbina\n\nWe discuss an application of the
SUSY approach to the analysis of\nspectral characteristics of hermitian a
nd non hermitian random band\nmatrices. In 1D case the obtained integral r
epresentations for\ncorrelation functions of characteristic polynomials al
low to analyze\nthe mechanism of phase transition between “localized” and
\nndelocalized” spectral behavior.
DTSTART:20240510T183000Z
DTEND:20240510T193000Z
LAST-MODIFIED:20240510T130308Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Analysis and Mathematical Physics
URL:https://www.ias.edu/math/events/analysis-and-mathematical-physics-28
END:VEVENT
BEGIN:VEVENT
UID:32313064-3131-4161-b662-316464663431
DTSTAMP:20240519T012345Z
CREATED:20240212T202937Z
DESCRIPTION: \nBOOK TALK WITH ELIZABETH BARRY WHITE\n_THE COUNTERFEIT COUNT
ESS_\nFRIDAY\, MAY 10\, 2024\n4:00 P.M. | RUBENSTEIN COMMONS\n\nAs we cele
brate women in math\, please join us for a Book Talk with\nElizabeth Barry
White on '_The Counterfeit Countess_\, the astonishing\nstory of Dr. Jose
phine Janina Mehlberg\, a Jewish mathematician who\nsaved thousands of liv
es in Nazi-occupied Poland by masquerading as a\nPolish countess.'\n\nLaby
rinth Books will be on-site to offer sale of _The Counterfeit\nCountess_.
Book signing and reception will follow the talk.\n\nTHIS EVENT IS ONLY OPE
N TO OUR IAS COMMUNITY AND *FRIENDS - REGISTER\nBELOW TO ATTEND. \n\n*Clic
k HERE [https://www.ias.edu/support/friends-of-ias] to learn more\nabout b
ecoming a Friend of the Institute.\n\n_Support for this event is provided
by the School of Math and the\nMinerva Research Program.._
DTSTART:20240510T200000Z
DTEND:20240510T200000Z
LAST-MODIFIED:20240418T174419Z
LOCATION:Rubenstein Commons
SUMMARY:Book Talk with Elizabeth Barry White
URL:https://www.ias.edu/events/book-talk-elizabeth-barry-white
END:VEVENT
BEGIN:VEVENT
UID:33353639-3639-4635-b863-363434623434
DTSTAMP:20240519T012345Z
CREATED:20240122T152535Z
DESCRIPTION:Topic: Topic 1: The Supersonic Project: Lighting Up the Faint E
nd of the JWST UV Luminosity Function Topic 2: Star clusters in the semi-a
nalytical galaxy formation model 'L-Galaxies'\n\nSpeakers: Claire Williams
(UCLA) and Nils Hoyer (MPIA)\n\nEach week\, we hold a relatively informal
seminar/discussion series\nwith an emphasis on extra-galactic and large-s
cale 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 sectio
n\, in greater\ndetail than may be explained within the text of the articl
e. To aid\nwith discussion\, only the article PDF is presented -- no\npowe
rpoint-style slides. Galread discussions are very friendly and\ninteractiv
e.
DTSTART:20240513T150000Z
DTEND:20240513T160000Z
LAST-MODIFIED:20240513T130606Z
LOCATION:Zoom and Peyton Hall\, Grand Central
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-97
END:VEVENT
BEGIN:VEVENT
UID:61376663-3566-4261-b065-343562366463
DTSTAMP:20240519T012345Z
CREATED:20240329T180207Z
DESCRIPTION:Topic: Quantum Mechanics\, Semidefinite Programming\, and Graph
Invariants\n\nSpeakers: Matthew Hastings\n\nThe central problem of physic
s and quantum chemistry is to find the\nground state energy of some physic
al system governed by quantum\nmechanics. In mathematical terms\, this me
ans finding the lowest\neigenvalue of some linear operator on a vector spa
ce with a tensor\nproduct structure. Since the dimension of the vector sp
ace grows\nexponentially with the size of the physical system\, the proble
m\nquickly becomes computationally intractable. Semidefinite\nprogramming
methods are one interesting way of approximating the\nsolution. Even the
se methods can become computationally difficult as\nthe order of the semid
efinite program increases\, but low order methods\ncan provide useful info
rmation. I will review some of these methods\,\nand give some positive an
d negative results showing their power and\nlimitations on various physica
l systems. Finally\, I will explain an\ninteresting new graph invariant s
uggested by these methods and give\nsome preliminary results on that invar
iant.
DTSTART:20240513T150000Z
DTEND:20240513T160000Z
LAST-MODIFIED:20240513T124559Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-i-573
END:VEVENT
BEGIN:VEVENT
UID:39306234-3536-4936-a135-353039396563
DTSTAMP:20240519T012345Z
CREATED:20240122T151408Z
DESCRIPTION:Topic: From Wobbles to Worlds: Exploring the Orbital Landscape
of Exoplanet TTVs\n\nSpeakers: Daniel Yahalomi (Columbia)\n\nTransit timin
g variations (TTVs) are ubiquitous in exoplanet transit\ndatasets\, with K
epler alone containing ~2\,000 periodic TTVs. However\,\nthese TTVs are of
ten ambiguous from a model selection perspective\, as\nit is difficult to
determine the physical cause of a TTV\, be it\nanother planet\, a moon\, o
r stellar activity. Currently\, careful\nconsiderations must be taken\, on
a case-by-case basis\, using\ncomputationally expensive N-body simulation
s\, in order to determine\nthe cause of an observed TTV signal. In this ta
lk\, we will discuss our\nwork building TTV model selection techniques\, t
hrough investigations\nof the orbital landscape of exoplanet TTVs. Specifi
cally\, we will\nfocus our discussion on two primary areas: the exomoon co
rridor and\nthe exoplanet edge. The exomoon corridor ranges from two-to-fo
ur times\nthe orbital period of the transiting planet\, and is where we ex
pect a\npile-up (~50%) of exomoon induced TTVs near the Nyquist period due
to\naliasing caused by undersampling. We will share our results from\nsea
rching the exomoon corridor for moon-like TTVs and our follow-up\nanalysis
of one of these systems. We will also present our finding\nthat perturbin
g planets are not expected to induce a TTV with an\nobserved dominant peri
od less than half their own orbital period. This\n“exoplanet edge” is the
manifestation of an observational alias of\nthe true TTV period. The prese
nce of an anomalous dominant TTV period\,\nin a two-planet system\, that f
alls below the exoplanet edge would\ndemonstrate that there exists additio
nal mass in the system\, besides\nthe two known exoplanets. Finally\, we i
dentify a number of two-planet\nsystems\, in Kepler data\, that don't lie
on the exoplanet edge\, and\ndiscuss several possible explanations for add
itional mass in the\nsystem.
DTSTART:20240513T160000Z
DTEND:20240513T170000Z
LAST-MODIFIED:20240513T130703Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-116
END:VEVENT
BEGIN:VEVENT
UID:33643763-3938-4662-b937-346633353139
DTSTAMP:20240519T012345Z
CREATED:20240508T154919Z
DESCRIPTION:Topic: Resolution of the Kohayakawa--Kreuter Conjecture \n\nSpe
akers: Raphael Steiner\n\nA graph $G$ is said to be Ramsey for a tuple of
graphs ($H_1\,...\,H_r$)\nif every $r$-coloring of the edges of $G$ contai
ns a monochromatic\ncopy of $H_i$ in color $i$\, for some $i$. A fundament
al question at\nthe intersection of Ramsey theory and the theory of random
graphs is\nto determine the threshold at which the binomial random graph
\n$G_{n\,p}$ becomes a.a.s. Ramsey for a fixed tuple ($H_1\,...\,H_r$)\, a
nd\na famous conjecture of Kohayakawa and Kreuter predicts this threshold.
\nEarlier work of Mousset-Nenadov-Samotij\, Bowtell-Hancock-Hyde\, and\nKu
perwasser-Samotij-Wigderson has reduced this probabilistic problem\nto a d
eterministic graph decomposition conjecture.\n\nIn this talk\, I will disc
uss history and background of this problem\nand sketch our recent proof (j
oint with M. Christoph\, A. Martinsson\,\nY. Wigderson) that the determini
stic graph decomposition conjecture is\ntrue\, thus resolving the Kohayaka
wa-Kreuter conjecture.
DTSTART:20240514T143000Z
DTEND:20240514T163000Z
LAST-MODIFIED:20240514T182810Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/math/events/computer-sciencediscrete-mathematics-se
minar-ii-566
END:VEVENT
BEGIN:VEVENT
UID:36663631-6635-4964-b830-633837653061
DTSTAMP:20240519T012345Z
CREATED:20240122T150046Z
DESCRIPTION:Topic: Studying Supernova Remnants using JWST Imagery\n\nSpeake
rs: Tea Temim\n\nSupernova explosions are among the most energetic events
in the\nuniverse and they play a key role in shaping the energy balance\,
\nstructure\, and chemical content of galaxies. They are responsible for\n
the formation and distribution of heavy elements and dust grains that\nenr
ich the environments in which they evolve. Moreover\, these\nexplosions le
ave behind compact objects whose high densities and\nmagnetic field streng
ths represent matter under some of the most\nextreme conditions known\, wh
ile some serve as “standard candles”\nwith a crucial role in determining c
osmic distances and the expansion\nhistory of the Universe.\n\nDespite the
ir great importance in astrophysics\, key questions remain\nabout what typ
e of stars produce supernovae and how they explode. In\nits first year of
observations\, JWST has provided an unprecedented\nview of supernova explo
sions\, allowing us to peer into the deepest\nlayers of ejected material\,
illuminating early dust formation\, and\nrevealing remarkable\, never-bef
ore-seen details in the structure of\nyoung supernova remnants. Dr. Temim
will review some of these recent\nJWST observations and what they tell us
about supernova explosions.
DTSTART:20240514T233000Z
DTEND:20240515T013000Z
LAST-MODIFIED:20240513T130939Z
LOCATION:Peyton Hall & Zoom
SUMMARY:Amateur Astronomers Association of Princeton (AAAP) Monthly Meeting
URL:https://www.ias.edu/sns/events/amateur-astronomers-association-princeto
n-aaap-monthly-meeting-27
END:VEVENT
BEGIN:VEVENT
UID:36373435-6662-4062-b331-313135356166
DTSTAMP:20240519T012345Z
CREATED:20230804T153951Z
DESCRIPTION:Topic: Misattributions and Forgeries in Middle Eastern Manuscri
pt Traditions\n\nConverners: GRIGORY KESSEL\, (Institut für Mittelalterfor
schung\,\nÖsterreichische Akademie der Wissenschaften\, Vienna)\, GEORGE A
.\nKIRAZ (School of Historical Studies\, IAS) and SABINE\nSCHMIDTKE (Schoo
l of Historical Studies\, IAS).\n\nWorkshop to be held at the Österreichis
che Akademie der\nWissenschaften\, Vienna. Details to follow at a later ti
me.\n\n
DTSTART:20240516T130000Z
DTEND:20240517T210000Z
LAST-MODIFIED:20230804T154326Z
LOCATION:
SUMMARY:NES Workshop
URL:https://www.ias.edu/hs/events/nes-workshop-0
END:VEVENT
BEGIN:VEVENT
UID:30646432-3063-4931-a165-333635356439
DTSTAMP:20240519T012345Z
CREATED:20240222T185409Z
DESCRIPTION:Topic: What is the Calderbank-Shor-Steane codes?\n\nSpeakers: S
iqi Liu
DTSTART:20240516T170000Z
DTEND:20240516T180000Z
LAST-MODIFIED:20240510T123339Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:What is...?
URL:https://www.ias.edu/math/events/what-30
END:VEVENT
BEGIN:VEVENT
UID:65633032-3733-4131-b137-623536636464
DTSTAMP:20240519T012345Z
CREATED:20240112T152151Z
DESCRIPTION:Topic: Bordism of Flow Modules and Exact Lagrangians\n\nSpeaker
s: Ivan Smith\n\nWe discuss constraints on exact Lagrangian embeddings obt
ained from\nconsidering bordism classes of flow modules over Lagrangian Fl
oer flow\ncategories. This talk reports on joint work with Noah Porcelli.
DTSTART:20240517T131500Z
DTEND:20240517T144500Z
LAST-MODIFIED:20240517T192327Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-149
END:VEVENT
BEGIN:VEVENT
UID:34613334-3236-4737-b435-323933356139
DTSTAMP:20240519T012345Z
CREATED:20240403T144235Z
DESCRIPTION:Topic: Deligne-Lusztig theory: examples and applications\n\nSpe
akers: Charlotte Chan\n\nAbstract: Geometry and representation theory are
intertwined in deep\nand foundational ways. One of the most important inst
ances of this\nrelationship was uncovered in the 1970s by Deligne and Lusz
tig: the\nrepresentation theory of matrix groups over finite fields is enc
oded\nin the geometry of a natural 'partition' of flag varieties. Recent\n
developments have revealed rich connections between Deligne-Lusztig\nvarie
ties and geometry studied in number-theoretic contexts. In this\nlecture s
eries\, we give an example-based tour of these ideas\, focusing\non how to
extract concrete information from theory.
DTSTART:20240520T133000Z
DTEND:20240520T143000Z
LAST-MODIFIED:20240517T135332Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics
END:VEVENT
BEGIN:VEVENT
UID:36383330-3636-4539-b131-646663303932
DTSTAMP:20240519T012345Z
CREATED:20240403T145411Z
DESCRIPTION:Topic: A Glimpse into the Langlands Program\n\nSpeakers: Ana Ca
raiani\n\nAbstract: The goal of this lecture series is to give you a glimp
se\ninto the Langlands program\, a central topic at the intersection of\na
lgebraic number theory\, algebraic geometry and representation theory.\nIn
the first lecture\, we will look at a celebrated instance of the\nLanglan
ds correspondence\, namely the modularity of elliptic curves. I\nwill try
to give you a sense of the different meanings of modularity\nand of the mu
ltitude of ingredients that go into establishing such a\nresult. In the fo
llowing lectures\, I will focus on the more geometric\ningredients\, first
in the special case of the modular curve and then\nfor higher-dimensional
Shimura varieties.
DTSTART:20240520T144500Z
DTEND:20240520T154500Z
LAST-MODIFIED:20240517T135606Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
3
END:VEVENT
BEGIN:VEVENT
UID:63316536-3734-4137-b839-623437316530
DTSTAMP:20240519T012345Z
CREATED:20240403T151246Z
DESCRIPTION:Topic: Growth of Cohomology of Picard Modular Surfaces: An Illu
strated Example of Langlands Functoriality\n\nSpeakers: Mathilde Gerbelli-
Gauthier\n\nAbstract: How fast do Betti numbers grow in a congruence tower
of\ncovering spaces? I'll discuss this question in the special case of\nP
icard modular surfaces\, which are 4-dimensional real manifolds.\nThere\,
the question is most interesting in degree 1\, for which there\nis expecte
d to be very little cohomology. I’ll explain how the\nproblem is related t
o automorphic forms\, and specifically how the\ndearth of cohomology class
es is a consequence of Langlands\nfunctoriality.
DTSTART:20240520T203000Z
DTEND:20240520T211000Z
LAST-MODIFIED:20240517T141925Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
9
END:VEVENT
BEGIN:VEVENT
UID:38363731-3038-4031-b666-663566636161
DTSTAMP:20240519T012345Z
CREATED:20240403T150420Z
DESCRIPTION:Topic: Emerton-Gee Stack for GL2 and Categorical p-adic Langlan
ds\n\nSpeakers: Kalyani Kansal\n\nAbstract: The Emerton-Gee stack is a sta
ck of etale $\phi$ modules\,\nand can be viewed as a stack of p-adic repre
sentations for the Galois\ngroup of a finite extension $K$ of $Qp$. In thi
s talk\, we will\nintroduce the stack and talk about its role in the conje
cture by\nEmerton\, Gee and Hellmann on categorical p-adic Langlands. We w
ill\nfocus attention on the reduced part of the stack for GL2\, which can
be\nviewed as parametrizing two-dimensional representations with mod p\nco
efficients\, and discuss various questions and results motivated by\nthis
conjectural categorical correspondence.
DTSTART:20240520T211500Z
DTEND:20240520T215500Z
LAST-MODIFIED:20240517T142002Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
7
END:VEVENT
BEGIN:VEVENT
UID:62323434-3930-4262-b661-326435623163
DTSTAMP:20240519T012345Z
CREATED:20240403T144747Z
DESCRIPTION:Topic: Deligne-Lusztig theory: examples and applications\n\nSpe
akers: Charlotte Chan\n\nAbstract: Geometry and representation theory are
intertwined in deep\nand foundational ways. One of the most important inst
ances of this\nrelationship was uncovered in the 1970s by Deligne and Lusz
tig: the\nrepresentation theory of matrix groups over finite fields is enc
oded\nin the geometry of a natural 'partition' of flag varieties. Recent\n
developments have revealed rich connections between Deligne-Lusztig\nvarie
ties and geometry studied in number-theoretic contexts. In this\nlecture s
eries\, we give an example-based tour of these ideas\, focusing\non how to
extract concrete information from theory.
DTSTART:20240521T133000Z
DTEND:20240521T143000Z
LAST-MODIFIED:20240517T135800Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
0
END:VEVENT
BEGIN:VEVENT
UID:38623865-6136-4834-b961-666430333266
DTSTAMP:20240519T012345Z
CREATED:20240403T145912Z
DESCRIPTION:Topic: A Glimpse into the Langlands Program\n\nSpeakers: Ana Ca
raiani\n\nAbstract: The goal of this lecture series is to give you a glimp
se\ninto the Langlands program\, a central topic at the intersection of\na
lgebraic number theory\, algebraic geometry and representation theory.\nIn
the first lecture\, we will look at a celebrated instance of the\nLanglan
ds correspondence\, namely the modularity of elliptic curves. I\nwill try
to give you a sense of the different meanings of modularity\nand of the mu
ltitude of ingredients that go into establishing such a\nresult. In the fo
llowing lectures\, I will focus on the more geometric\ningredients\, first
in the special case of the modular curve and then\nfor higher-dimensional
Shimura varieties.
DTSTART:20240521T144500Z
DTEND:20240521T154500Z
LAST-MODIFIED:20240517T135856Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
4
END:VEVENT
BEGIN:VEVENT
UID:39323539-6539-4436-b461-643439393463
DTSTAMP:20240519T012345Z
CREATED:20240403T151537Z
DESCRIPTION:Topic: Colloquium
DTSTART:20240521T203000Z
DTEND:20240521T213000Z
LAST-MODIFIED:20240403T151630Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
11
END:VEVENT
BEGIN:VEVENT
UID:38366439-6133-4263-b362-306362613963
DTSTAMP:20240519T012345Z
CREATED:20240403T144837Z
DESCRIPTION:Topic: Deligne-Lusztig theory: examples and applications\n\nSpe
akers: Charlotte Chan\n\nAbstract: Geometry and representation theory are
intertwined in deep\nand foundational ways. One of the most important inst
ances of this\nrelationship was uncovered in the 1970s by Deligne and Lusz
tig: the\nrepresentation theory of matrix groups over finite fields is enc
oded\nin the geometry of a natural 'partition' of flag varieties. Recent\n
developments have revealed rich connections between Deligne-Lusztig\nvarie
ties and geometry studied in number-theoretic contexts. In this\nlecture s
eries\, we give an example-based tour of these ideas\, focusing\non how to
extract concrete information from theory.
DTSTART:20240523T133000Z
DTEND:20240523T143000Z
LAST-MODIFIED:20240517T135924Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
1
END:VEVENT
BEGIN:VEVENT
UID:37316561-6135-4934-b134-346535326134
DTSTAMP:20240519T012345Z
CREATED:20240403T150026Z
DESCRIPTION:Topic: A Glimpse into the Langlands Program\n\nSpeakers: Ana Ca
raiani \n\nAbstract: The goal of this lecture series is to give you a glim
pse\ninto the Langlands program\, a central topic at the intersection of\n
algebraic number theory\, algebraic geometry and representation theory.\nI
n the first lecture\, we will look at a celebrated instance of the\nLangla
nds correspondence\, namely the modularity of elliptic curves. I\nwill try
to give you a sense of the different meanings of modularity\nand of the m
ultitude of ingredients that go into establishing such a\nresult. In the f
ollowing lectures\, I will focus on the more geometric\ningredients\, firs
t in the special case of the modular curve and then\nfor higher-dimensiona
l Shimura varieties.
DTSTART:20240523T144500Z
DTEND:20240523T154500Z
LAST-MODIFIED:20240517T140044Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
5
END:VEVENT
BEGIN:VEVENT
UID:61336336-6364-4731-a332-653765623536
DTSTAMP:20240519T012345Z
CREATED:20240410T191805Z
DESCRIPTION:Topic: Publishing Math Books\n\nSpeakers: Diana Gillooly
DTSTART:20240523T160000Z
DTEND:20240523T163000Z
LAST-MODIFIED:20240410T192055Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
12
END:VEVENT
BEGIN:VEVENT
UID:39343834-3337-4064-a634-316136323332
DTSTAMP:20240519T012345Z
CREATED:20240403T151425Z
DESCRIPTION:Topic: Integral Hecke Correspondences\n\nSpeakers: Si Ying Lee
\n\nShimura varieties are an important geometric object in the Langlands\n
program\, because the Hecke (adelic group) action allows us to view\nvario
us cohomology groups as Hecke modules. Moreover\, the cohomology\nadmits a
n integral structure when the Shimura variety has an integral\nmodel\, and
we hence want to extend this Hecke action integrally. I\nwill talk about
constructing integral models for Hecke correspondences\nin both the global
and local (Rapoport-Zink spaces) setting\, to get\nquasi-smooth derived (
formal) schemes. This is joint work in progress\nwith Keerthi Madapusi.
DTSTART:20240523T203000Z
DTEND:20240523T211000Z
LAST-MODIFIED:20240517T140207Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
10
END:VEVENT
BEGIN:VEVENT
UID:39396262-6262-4964-a563-623233613237
DTSTAMP:20240519T012345Z
CREATED:20240403T151001Z
DESCRIPTION:Topic: Modular Generating Series for Real Quadratic Heegner Obj
ects\n\nSpeakers: Alice Pozzi\n\nAbstract: The theory of elliptic curves w
ith complex multiplication\nhas yielded some striking arithmetic applicati
ons\, ranging from (cases\nof) Hilbert’s Twelfth Problem to the Birch and
Swinnerton-Dyer\nConjecture. These applications rely on the construction o
f certain\n“Heegner objects”\, arising from imaginary quadratic points on
the\ncomplex upper half plane\; the most famous examples of these are\nHee
gner points. \n\nIn recent years\, conjectural analogues of these Heegner
objects for\nreal quadratic fields have been constructed via p-adic method
s. In\nthis talk\, I will discuss how Heegner objects for real quadratic\n
fields can be used to obtain modular generating series\, that is\,\nformal
q-series that are q-expansions of classical modular forms. This\nis joint
work with Judith Ludwig\, Isabella Negrini\, Sandra Rozensztajn\nand Hann
eke Wiersema.
DTSTART:20240523T211500Z
DTEND:20240523T215500Z
LAST-MODIFIED:20240517T140250Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
8
END:VEVENT
BEGIN:VEVENT
UID:65363533-3736-4533-a433-663861636566
DTSTAMP:20240519T012345Z
CREATED:20240112T152212Z
DESCRIPTION:Topic: New Algebraic Invariants of Legendrian Links\n\nSpeakers
: Lenhard Ng\n\nFor the past 25 years\, Legendrian contact homology has pl
ayed a key\nrole in contact topology. I'll discuss a package of new invari
ants for\nLegendrian knots and links that builds on Legendrian contact hom
ology\nand is derived from rational symplectic field theory. This includes
a\nPoisson bracket on Legendrian contact homology and a symplectic\nstruc
ture on augmentation varieties. Time permitting\, I'll also\ndescribe an u
nexpected connection to cluster theory for a family of\nLegendrian links a
ssociated to positive braids. Parts of this are\njoint work in progress wi
th Roger Casals\, Honghao Gao\, Linhui Shen\,\nand Daping Weng.
DTSTART:20240524T131500Z
DTEND:20240524T144500Z
LAST-MODIFIED:20240514T132215Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-150
END:VEVENT
BEGIN:VEVENT
UID:36663036-6562-4233-b339-613261636662
DTSTAMP:20240519T012345Z
CREATED:20240403T144930Z
DESCRIPTION:Topic: Deligne-Lusztig theory: examples and applications\n\nSpe
akers: Charlotte Chan\n\nAbstract: Geometry and representation theory are
intertwined in deep\nand foundational ways. One of the most important inst
ances of this\nrelationship was uncovered in the 1970s by Deligne and Lusz
tig: the\nrepresentation theory of matrix groups over finite fields is enc
oded\nin the geometry of a natural 'partition' of flag varieties. Recent\n
developments have revealed rich connections between Deligne-Lusztig\nvarie
ties and geometry studied in number-theoretic contexts. In this\nlecture s
eries\, we give an example-based tour of these ideas\, focusing\non how to
extract concrete information from theory.
DTSTART:20240524T133000Z
DTEND:20240524T143000Z
LAST-MODIFIED:20240517T140319Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
2
END:VEVENT
BEGIN:VEVENT
UID:62633939-3632-4238-b739-363733393936
DTSTAMP:20240519T012345Z
CREATED:20240403T150109Z
DESCRIPTION:Topic: A Glimpse into the Langlands Program\n\nSpeakers: Ana Ca
riani\n\nAbstract: The goal of this lecture series is to give you a glimps
e\ninto the Langlands program\, a central topic at the intersection of\nal
gebraic number theory\, algebraic geometry and representation theory.\nIn
the first lecture\, we will look at a celebrated instance of the\nLangland
s correspondence\, namely the modularity of elliptic curves. I\nwill try t
o give you a sense of the different meanings of modularity\nand of the mul
titude of ingredients that go into establishing such a\nresult. In the fol
lowing lectures\, I will focus on the more geometric\ningredients\, first
in the special case of the modular curve and then\nfor higher-dimensional
Shimura varieties.
DTSTART:20240524T144500Z
DTEND:20240524T154500Z
LAST-MODIFIED:20240517T140432Z
LOCATION:Simonyi Hall 101
SUMMARY:2024 Program for Women+ and Mathematics
URL:https://www.ias.edu/math/wam/events/2024-program-women-and-mathematics-
6
END:VEVENT
BEGIN:VEVENT
UID:31613433-3864-4139-b634-366566366338
DTSTAMP:20240519T012345Z
CREATED:20240207T145855Z
DESCRIPTION:Topic: Continuous Symmetry Breaking: A Rigorous Approach\n\nSpe
akers: Sara Daneri\n\nAt the base of spontaneous pattern formation is univ
ersally believed\nto be the competition between short range attractive and
long range\nrepulsive forces. Though such a phenomenon is observed in exp
eriments\nand simulations\, a rigorous understanding of the mechanisms at
its\nbase is still in most physical problems a challenging open problem.\n
The main difficulties are due to the nonlocality of the interactions\nand\
, in more than one space dimensions\, the symmetry breaking\nphenomenon (n
amely the fact that the interactions have a larger group\nof symmetries th
an that of their minimizers). \n\nIn this talk we consider a general class
of isotropic functionals in\ndimension $d\geq 2$\, typical in physical mo
dels\, in which a surface\nterm favouring pure phases competes with a nonl
ocal term with power\nlaw kernel favouring alternation between different p
hases. Close to\nthe critical regime in which the two terms are of the sam
e order\, we\ngive a rigorous proof of the conjectured symmetry breaking a
nd pattern\nformation for global minimizers\, in the shape of domains with
flat\nboundary (e.g. stripes or lamellae). \n\nAmong others\, our approac
h relies on detecting a nonlocal\ncurvature-type quantity which is control
led by the energy functional\nand whose finiteness implies flatness for su
fficiently regular\nboundaries. \n\nThis is a joint work with E. Runa.
DTSTART:20240524T183000Z
DTEND:20240524T193000Z
LAST-MODIFIED:20240517T120247Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Analysis and Mathematical Physics
URL:https://www.ias.edu/math/events/analysis-and-mathematical-physics-30
END:VEVENT
BEGIN:VEVENT
UID:65643838-3663-4563-b464-353631306561
DTSTAMP:20240519T012345Z
CREATED:20240122T151442Z
DESCRIPTION:Topic: TBA
DTSTART:20240527T160000Z
DTEND:20240527T170000Z
LAST-MODIFIED:20240122T151441Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-118
END:VEVENT
BEGIN:VEVENT
UID:38333565-3764-4834-b138-656463373833
DTSTAMP:20240519T012345Z
CREATED:20240112T152248Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Álvaro Pelayo
DTSTART:20240531T131500Z
DTEND:20240531T144500Z
LAST-MODIFIED:20240506T143612Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-151
END:VEVENT
BEGIN:VEVENT
UID:62346261-3431-4765-a633-323639633433
DTSTAMP:20240519T012345Z
CREATED:20240207T150202Z
DESCRIPTION:Topic: TBD\n\nSpeakers: Sky Cao
DTSTART:20240531T183000Z
DTEND:20240531T193000Z
LAST-MODIFIED:20240212T133158Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Analysis and Mathematical Physics
URL:https://www.ias.edu/math/events/analysis-and-mathematical-physics-34
END:VEVENT
BEGIN:VEVENT
UID:37303032-3231-4766-a161-393139366535
DTSTAMP:20240519T012345Z
CREATED:20240122T151507Z
DESCRIPTION:Topic: TBA
DTSTART:20240603T160000Z
DTEND:20240603T170000Z
LAST-MODIFIED:20240122T151506Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-119
END:VEVENT
BEGIN:VEVENT
UID:66613631-6163-4437-a436-343866633830
DTSTAMP:20240519T012345Z
CREATED:20240122T151550Z
DESCRIPTION:Topic: TBA
DTSTART:20240610T160000Z
DTEND:20240610T170000Z
LAST-MODIFIED:20240122T151549Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-120
END:VEVENT
BEGIN:VEVENT
UID:65323636-3961-4133-a139-396430633337
DTSTAMP:20240519T012345Z
CREATED:20240122T150124Z
DESCRIPTION:Topic: TBA
DTSTART:20240611T233000Z
DTEND:20240612T013000Z
LAST-MODIFIED:20240122T150124Z
LOCATION:Peyton Hall & Zoom
SUMMARY:Amateur Astronomers Association of Princeton (AAAP) Monthly Meeting
URL:https://www.ias.edu/sns/events/amateur-astronomers-association-princeto
n-aaap-monthly-meeting-29
END:VEVENT
BEGIN:VEVENT
UID:37373837-6362-4066-b936-363066383538
DTSTAMP:20240519T012345Z
CREATED:20240112T152524Z
DESCRIPTION:Topic: TBA
DTSTART:20240614T131500Z
DTEND:20240614T144500Z
LAST-MODIFIED:20240112T152523Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-153
END:VEVENT
BEGIN:VEVENT
UID:65633735-6166-4137-a430-373530346461
DTSTAMP:20240519T012345Z
CREATED:20240122T151607Z
DESCRIPTION:Topic: TBA
DTSTART:20240617T160000Z
DTEND:20240617T170000Z
LAST-MODIFIED:20240122T151606Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-121
END:VEVENT
BEGIN:VEVENT
UID:64636164-3039-4165-a138-666461316639
DTSTAMP:20240519T012345Z
CREATED:20240122T151627Z
DESCRIPTION:Topic: TBA
DTSTART:20240624T160000Z
DTEND:20240624T170000Z
LAST-MODIFIED:20240122T151626Z
LOCATION:Zoom and Peyton Dome Rm\, Princeton University
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-122
END:VEVENT
BEGIN:VEVENT
UID:64326433-3937-4666-b739-363037393266
DTSTAMP:20240519T012345Z
CREATED:20240112T152657Z
DESCRIPTION:Topic: TBA
DTSTART:20240628T131500Z
DTEND:20240628T144500Z
LAST-MODIFIED:20240112T152656Z
LOCATION:Remote Access
SUMMARY:Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoo
minar
URL:https://www.ias.edu/math/events/joint-iasprincetonmontrealparistel-aviv
-symplectic-geometry-zoominar-155
END:VEVENT
END:VCALENDAR