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UID:62396232-3133-4661-b366-613762646338
X-WR-TIMEZONE:UTC
X-WR-CALNAME:IAS Academic
BEGIN:VEVENT
UID:35613636-6230-4131-b634-353734396331
DTSTAMP:20220928T084834Z
CREATED:20220719T140656Z
DESCRIPTION:Topic: Graphs as geometric objects\n\nSpeakers: Nathan Linial\n
\nAffiliation: The Hebrew University\n\nIt may seem quite obvious that gra
phs carry a lot of geometric\nstructure. Don't we learn in algorithm clas
ses how to solve\nall-pairs-shortest-paths\, minimum spanning trees etc.?
However\, in\nthis talk\, I will try to impress on you the idea that ther
e is much\nmore to be discovered here. For example: Let G=(V\,E) be a gra
ph and\nlet w be a mapping from E to the positive reals. Let us restrict
\nourselves to the case where no ties occur and so for every two\ndistinct
vertices u\,v there is a unique w-shortest path that connects\nthem (uniq
ueness holds with probability 1). Let w’ be another set\nof positive weig
hts on E. We consider w and w’ equivalent if they\ndefine the same system
of shortest paths. Question: Given a graph G\nhow many such different eq
uivalence classes can it have at least/at\nmost? Also\, we say that a path
system on G is consistent if it is\nclosed under taking subpaths. Questi
on: Does every consistent path\nsystem on G come from a function w as abov
e? The answer is an\nemphatic NO. \n\nThe new results are from joint work
with my student Daniel Cizma.
DTSTART:20220725T151500Z
DTEND:20220725T161500Z
LAST-MODIFIED:20220725T171053Z
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-512
END:VEVENT
BEGIN:VEVENT
UID:64643566-6131-4466-b032-646236326233
DTSTAMP:20220928T084834Z
CREATED:20220902T130301Z
DESCRIPTION:The Bahcall Lunch follow the astrophysics colloquium\nlecture.
REGISTRATION IS REQUIRED BY 3PM THE PREVIOUS FRIDAY SO A\nMEAL CAN BE PROV
IDED. Please contact Amanda Cenker with questions.
DTSTART:20220906T163000Z
DTEND:20220906T173000Z
LAST-MODIFIED:20220902T130313Z
LOCATION:Simons Hall Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-23
END:VEVENT
BEGIN:VEVENT
UID:32326264-3338-4262-b131-376630363362
DTSTAMP:20220928T084834Z
CREATED:20220902T130758Z
DESCRIPTION:Topic: Pushing the frontiers of gravitational encounters and co
llisionless dynamicsTBA\n\nSpeakers: Uddipan Banik\n\nAffiliation: Yale Un
iversity\n\nGravity plays the central role in structure formation and evol
ution in\nastronomical scales. Despite the apparently simple inverse squar
e law\nfor the gravitational force in the non-relativistic regime\, the\nd
ynamics of self-gravitating many-body systems such as galaxies and\ndark m
atter (DM) halos is still not sufficiently well understood due\nto the lon
g range nature of gravity. Relaxation/equilibration of\ngalaxies and cold
dark matter halos is typically not driven by\ntwo-body encounters but is a
collective\, collisionless process. Based\non the interaction timescale\,
gravitational encounters can be broadly\nclassified as impulsive (fast)\,
resonant and adiabatic (slow). First\,\nI am going to present a general n
on-perturbative formalism to\naccurately model the impulsive encounters be
tween star-clusters\,\ngalaxies or DM halos. Next\, I shall present a self
-consistent\,\ntime-dependent\, perturbative treatment of the secular evol
ution\n(dynamical friction) of massive perturbers in host galaxies or DM\n
halos due to resonant interactions with field particles. This novel\nforma
lism resolves the long-standing problem of core-stalling observed\nin N-bo
dy simulations: the apparent cessation of dynamical friction\ndriven in-fa
ll of massive perturbers in spherical host systems with\ncentral cores. In
our formalism\, core-stalling naturally arises from a\nbalance between a
retarding torque (dynamical friction) outside and a\nhitherto unknown enha
ncing torque (dynamical buoyancy) inside the\ncore-region. To this end\, I
shall also describe the precise nature of\nnear-resonant field particle o
rbits responsible for dynamical friction\nand buoyancy. The dynamical phen
omena of core-stalling and buoyancy\nimply that measuring the offsets of m
assive objects like globular\nclusters and black holes from the centers of
DM dominated dwarf\ngalaxies can potentially constrain their inner DM den
sity profile and\nthe DM particle nature. Finally\, I shall present a comp
rehensive\nanalysis of the response of disk galaxies to perturbations usin
g\nlinear perturbation theory. The oscillations of the disk response\nphas
e-mix away due to an intrinsic spread in the frequencies\, giving\nrise to
spiral-shaped features in the phase-space known as phase-space\nspirals a
kin to those observed by Gaia in the Milky Way disk.\nImpulsive (fast) and
mildly adiabatic (slow) encounters excite\ndifferent oscillation modes (b
ending vs breathing) and thus different\nlooking phase-space spirals. I sh
all elucidate how these phase-space\nspirals can be used to constrain the
dynamical history and detailed DM\ndistribution of our Milky Way galaxy.
DTSTART:20220908T150000Z
DTEND:20220908T160000Z
LAST-MODIFIED:20220902T130907Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-45
END:VEVENT
BEGIN:VEVENT
UID:63333164-6165-4536-b865-633339373436
DTSTAMP:20220928T084834Z
CREATED:20220902T131119Z
DESCRIPTION:Topic: Data Science Solutions for Time Domain Astronomy Problem
s: From Microlensing to Supernovae\n\nSpeakers: Somayeh Khakpash\n\nAffili
ation: Rutgers University\n\nTime domain astronomy will face big data chal
lenges with operation of\nbig surveys such as Rubin LSST and Roman. These
challenges are being\naddressed by data science methods some of which are
also applicable to\nother fields of science with large volumes of data. Ha
ving that big\npicture in mind\, I am going to talk about two main project
s that I\nhave worked on involving developing methods to analyze astronomi
cal\ntime series. In the first project\, I have developed automated\nalgor
ithms to analyze and classify simulated stellar microlensing\nlight curves
for the future Roman Space mission. In the second\nproject\, I have used
Gaussian Processes to generate photometric\ntemplates for striped-envelope
supernovae collecting all the\nphotometry that is available online. Final
ly\, I will briefly talk\nabout the work I am going to do as a LSSTC Catal
yst Fellow for which I\nwill use data science and artificial intelligence
methods to address\nan important problem in the field of quasar microlensi
ng.
DTSTART:20220908T180000Z
DTEND:20220908T190000Z
LAST-MODIFIED:20220902T131212Z
LOCATION:Serin Hall\, Room W330
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
19
END:VEVENT
BEGIN:VEVENT
UID:66333238-3730-4737-b566-363739653532
DTSTAMP:20220928T084834Z
CREATED:20220829T175824Z
DESCRIPTION:Topic: Probabilistic conformal block and its semi-classical lim
it\n\nSpeakers: Promit Ghosal\n\nAffiliation: Massachusetts Institute of T
echnology\n\nConformal blocks are fundamental objects in the conformal boo
tstrap\nprogram of 2D conformal field theory and are closely related to fo
ur\ndimensional supersymmetric gauge theory.\n\nIn this talk\, I will demo
nstrate a probabilistic construction of a\n1-point torus conformal block a
nd discuss its semi-classical\nlimit. This talk will be based on two separ
ate works. The first one\nwith Guillaume Remy\, Xin Sun and Yi Sun and the
second one\nwith Harini Desiraju and Andrei Prokhorov.
DTSTART:20220909T151500Z
DTEND:20220909T161500Z
LAST-MODIFIED:20220909T135523Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Probability Seminar
URL:https://www.ias.edu/math/events/probability-seminar
END:VEVENT
BEGIN:VEVENT
UID:61653239-3232-4237-a232-326234626339
DTSTAMP:20220928T084834Z
CREATED:20220902T131355Z
DESCRIPTION:The Bahcall Lunch follow the astrophysics colloquium\nlecture.
REGISTRATION IS REQUIRED BY 3PM THE PREVIOUS FRIDAY SO A\nMEAL CAN BE PROV
IDED. Please contact Amanda Cenker with questions.
DTSTART:20220913T163000Z
DTEND:20220913T173000Z
LAST-MODIFIED:20220902T131421Z
LOCATION:Simons Hall Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-24
END:VEVENT
BEGIN:VEVENT
UID:37623939-6361-4565-b831-383334313064
DTSTAMP:20220928T084834Z
CREATED:20220902T133225Z
DESCRIPTION:Topic: Genesis\, dynamics\, and dissipation of turbulent magnet
ic fields\n\nSpeakers: Muni Zhou\n\nAffiliation: The Institute for Advance
d Study\n\nAstronomical observations indicate that coherent\, dynamically
\nimportant magnetic fields are ubiquitous in the Universe. However\,\nnei
ther the origin problem -- what are the physical mechanisms that\ngenerate
the initial ``seed'' magnetic fields —- nor the dynamo\nproblem—how magne
tic fields are amplified and sustained by turbulent\nplasma motions -- are
well understood. In addition\, the role played by\nthese fields in determ
ining the material and thermodynamic properties\nof cosmic plasmas\, which
strongly impact various astrophysical\nphenomena\, is still unknown. This
talk will follow the ``life cycle''\nof cosmic magnetic fields and addres
ses problems including the\nmagnetogenesis\, the formation of large-scale
magnetic fields\, the\nmagnetized turbulent cascade through kinetic scales
\, and the plasma\nheating that ultimately ensues.\n\nI will first demonst
rate in a fully kinetic framework the generation\nof seed magnetic fields
through the Weibel instability under a generic\nlarge-scale shear flow. Th
e resulting spontaneous plasma magnetization\nconfirms kinetic plasma proc
esses as a plausible cause of\nmagnetogenesis and that cosmic plasmas are
thereby ubiquitously\nmagnetized. This study sets the stage for studying w
hether such\nmicroscopic seed fields with filamentary morphology\, under t
he joint\naction of their own nonlinear evolution and background turbulenc
e\, can\ncontribute to the formation of macroscopic magnetic fields. We ad
dress\nthis question by studying the dynamics of a large ensemble of\ninte
racting magnetic flux tubes\, which resembles a wide range of\nastrophysic
al systems in addition to the Weibel seed fields. The\nemergence of large-
scale magnetic structures from small-scale\nturbulence is identified as a
consequence of magnetic reconnection of\nmagnetic flux tubes\, leading to
the inverse transfer of magnetic\nenergy. In the last part of the talk\, I
will discuss the ensuing\nstrongly magnetized plasma turbulence in the ki
netic range (below the\nion gyroscale). The self-organization and dynamics
of the magnetic\nfields is found to give rise to intermittency\, which de
termines the\nturbulent spectrum\, and efficient phase mixing around curre
nt sheets\,\nwhich leads to electron heating. These results advance a\nfir
st-principles understanding of the origin and dynamics of cosmic\nmagnetic
fields and their implications for astrophysical phenomena.
DTSTART:20220915T150000Z
DTEND:20220915T160000Z
LAST-MODIFIED:20220909T125027Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-46
END:VEVENT
BEGIN:VEVENT
UID:33326463-3761-4233-b734-626438363963
DTSTAMP:20220928T084834Z
CREATED:20220914T173009Z
DESCRIPTION:Topic: 2D Random Geometry and Conformal Field Theory\n\nSpeake
rs: Xin Sun\n\nAffiliation: Xin Sun: University of Pennsylvania\; Member\
, School of Mathematics\n\nRandom surfaces and scaling limits of 2D lattic
e models that are\nnowadays studied via LQG and SLE in probability\, have
been studied\nvia another approach called conformal field theory (CFT) si
nce the\n1980s in theoretical physics. There are three CFTs that are most
\nrelevant to 2D random geometry: Liouville CFT\, minimal model and ghost
\nCFT. Their relevance as suggested by physics are as follows.\nLiouville
CFT described the conformal factor of canonical random\nsurfaces in LQG w
ith a fixed conformal structure. The scaling limit of\n2D lattice models w
hich are nowadays studied by SLE were originally\nstudied by minimal model
CFTs. The law of the conformal structure for\nBrownian maps on non-simply
connected surfaces\, as a measure on the\nmoduli space\, is described by
the ghost CFT in bosonic string\ntheory. I will try to clarify these pict
ures and give an overview of\nrecent results and ongoing projects towards
understanding them\nin probability. Based on joint works with Ang\, Holden
\, Remy\, Wu\, Xu\,\nYu\, Zhuang.
DTSTART:20220916T140000Z
DTEND:20220916T160000Z
LAST-MODIFIED:20220915T184947Z
LOCATION:Simonyi 101
SUMMARY:Probability Seminar
URL:https://www.ias.edu/math/events/probability-seminar-12
END:VEVENT
BEGIN:VEVENT
UID:33323330-3433-4566-a432-366238393563
DTSTAMP:20220928T084834Z
CREATED:20200110T181651Z
DESCRIPTION:
DTSTART:20220919T130000Z
DTEND:20220919T130000Z
LAST-MODIFIED:20210104T030021Z
LOCATION:
SUMMARY:IAS School of Mathematics Term I Begins
URL:https://www.ias.edu/math/events/ias-school-mathematics-term-i-begins-1
END:VEVENT
BEGIN:VEVENT
UID:39316462-3636-4339-a133-393332373864
DTSTAMP:20220928T084834Z
CREATED:20220902T131428Z
DESCRIPTION:The Bahcall Lunch follow the astrophysics colloquium\nlecture.
REGISTRATION IS REQUIRED BY 3PM THE PREVIOUS FRIDAY SO A\nMEAL CAN BE PROV
IDED. Please contact Amanda Cenker with questions.
DTSTART:20220920T163000Z
DTEND:20220920T173000Z
LAST-MODIFIED:20220902T131447Z
LOCATION:Simons Hall Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-25
END:VEVENT
BEGIN:VEVENT
UID:38316539-3337-4866-b962-666637653334
DTSTAMP:20220928T084834Z
CREATED:20220720T182555Z
DESCRIPTION:Topic: “Popular” enhancements of Szemerédi’s theorem\n\nSpeaker
s: Ethan M Ackelsberg\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220920T180000Z
DTEND:20220920T181500Z
LAST-MODIFIED:20220920T205127Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-573
END:VEVENT
BEGIN:VEVENT
UID:65303937-6334-4064-a531-363839613930
DTSTAMP:20220928T084834Z
CREATED:20220720T190924Z
DESCRIPTION:Topic: Classifying (quasi-)smooth varieties up to cobordism\n\n
Speakers: Toni Mikael Annala\n\nAffiliation: Member\, School of Mathematic
s
DTSTART:20220920T182000Z
DTEND:20220920T183500Z
LAST-MODIFIED:20220920T205104Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-575
END:VEVENT
BEGIN:VEVENT
UID:38623661-3661-4836-b466-386339633836
DTSTAMP:20220928T084834Z
CREATED:20220720T191908Z
DESCRIPTION:Topic: Decoupling and the Utility of Destructive Wave Interfere
nce\n\nSpeakers: D. Dominique Kemp\n\nAffiliation: Member\, School of Math
ematics
DTSTART:20220920T184000Z
DTEND:20220920T185500Z
LAST-MODIFIED:20220920T205026Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-576
END:VEVENT
BEGIN:VEVENT
UID:61666364-6130-4966-b739-333435653335
DTSTAMP:20220928T084834Z
CREATED:20220720T193124Z
DESCRIPTION:Topic: Topology and arithmetic of some spaces of polynomials wi
th some constraints\n\nSpeakers: Oishee Banerjee\n\nAffiliation: Member\,
School of Mathematics
DTSTART:20220920T200000Z
DTEND:20220920T201500Z
LAST-MODIFIED:20220921T122944Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-589
END:VEVENT
BEGIN:VEVENT
UID:30643338-3936-4232-a136-376361393337
DTSTAMP:20220928T084834Z
CREATED:20220720T193231Z
DESCRIPTION:Topic: Urysohn widths mod p\n\nSpeakers: Aleksandr Berdnikov\n
\nAffiliation: Member\, School of Mathematics
DTSTART:20220920T202000Z
DTEND:20220920T203500Z
LAST-MODIFIED:20220921T123128Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-590
END:VEVENT
BEGIN:VEVENT
UID:36346163-3936-4133-b239-643735393936
DTSTAMP:20220928T084834Z
CREATED:20220720T193417Z
DESCRIPTION:Topic: Strength of Polynomials\n\nSpeakers: Arthur Bik\n\nAffil
iation: Member\, School of Mathematics
DTSTART:20220920T204000Z
DTEND:20220920T205500Z
LAST-MODIFIED:20220921T123349Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-591
END:VEVENT
BEGIN:VEVENT
UID:34376432-3362-4361-b832-636238353937
DTSTAMP:20220928T084834Z
CREATED:20220824T153746Z
DESCRIPTION:Topic: Time Change for Unipotent Flows and Rigidity\n\nSpeakers
: Elon Lindenstrauss\n\nAffiliation: The Hebrew University of Jerusalem\n
\nTwo flows are said to be Kakutani equivalent if one is isomorphic to\nth
e other after time change\, or equivalently if there are Poincare\nsection
s for the flows so that the respective induced maps are\nisomorphic to eac
h other. Ratner showed that if $G=SL(2\,R)$ and\n$\Gamma$ is a lattice in
$G$\, and if $u_t$ is a one parameter\nunipotent subgroup in $G$ then the
$u_t$ action on $G/\Gamma$ equipped\nwith Haar measure is loosely Bernoull
i\, i.e. Kakutani equivalent to a\ncircle rotation. Thus any two such syst
ems are Kakutani equivalent to\neach other. On the other hand\, Ratner sho
wed that if $G=SL(2\,R)\times\nSL(2\,R)$ and $\Gamma$ is a reducible latti
ce\, and $u_t$ is the\ndiagonally embedded one parameter unipotent subgrou
p in $G$\, then\n$(G/\Gamma\, u_t\, m)$ is not loosely Bernoulli.\n\nThis
leads naturally to the question: which unipotent flows are\nKakutani equiv
alent to one another? How much of the structure is\npreserved after a time
change? \n\nJoint work with Daren Wei.
DTSTART:20220921T150000Z
DTEND:20220921T160000Z
LAST-MODIFIED:20220920T125309Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Special Program Learning Seminar
URL:https://www.ias.edu/events/special-program-learning-seminar
END:VEVENT
BEGIN:VEVENT
UID:61373733-6664-4261-b332-343330346262
DTSTAMP:20220928T084834Z
CREATED:20220720T192005Z
DESCRIPTION:Topic: Ricci curvature and non-smooth geometry\n\nSpeakers: Eli
a Bruè\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220921T180000Z
DTEND:20220921T181500Z
LAST-MODIFIED:20220921T183401Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-577
END:VEVENT
BEGIN:VEVENT
UID:39623134-3261-4432-b961-373464373730
DTSTAMP:20220928T084834Z
CREATED:20220720T192034Z
DESCRIPTION:Topic: Robust sublinear expanders\n\nSpeakers: Matija Bucic\n\n
Affiliation: Member\, School of Mathematics
DTSTART:20220921T182000Z
DTEND:20220921T183500Z
LAST-MODIFIED:20220921T183419Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-578
END:VEVENT
BEGIN:VEVENT
UID:36666333-3638-4666-b236-333433666334
DTSTAMP:20220928T084834Z
CREATED:20220720T192120Z
DESCRIPTION:Topic: Introduction to lattice gauge theories\n\nSpeakers: Sky
Yang Cao\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220921T184000Z
DTEND:20220921T185500Z
LAST-MODIFIED:20220921T183451Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-579
END:VEVENT
BEGIN:VEVENT
UID:38353865-6365-4136-b336-363863623737
DTSTAMP:20220928T084834Z
CREATED:20220720T193538Z
DESCRIPTION:Topic: The categorical geometric Langlands conjecture\n\nSpeake
rs: Lin Chen\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220921T200000Z
DTEND:20220921T201500Z
LAST-MODIFIED:20220922T134554Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-592
END:VEVENT
BEGIN:VEVENT
UID:64643637-3964-4662-b162-363561316365
DTSTAMP:20220928T084834Z
CREATED:20220720T193621Z
DESCRIPTION:Topic: Model theory and combinatorics of finite fields\n\nSpeak
ers: Alexis Chevalier\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220921T202000Z
DTEND:20220921T203500Z
LAST-MODIFIED:20220922T134745Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-593
END:VEVENT
BEGIN:VEVENT
UID:32353831-3564-4833-b930-616166353935
DTSTAMP:20220928T084834Z
CREATED:20220720T193708Z
DESCRIPTION:Topic: Structural complexity of universal theories via continuo
us combinatorics\n\nSpeakers: Leonardo Coregliano\n\nAffiliation: Member\,
School of Mathematics
DTSTART:20220921T204000Z
DTEND:20220921T205500Z
LAST-MODIFIED:20220922T134818Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-594
END:VEVENT
BEGIN:VEVENT
UID:63396334-3861-4166-a465-333730626564
DTSTAMP:20220928T084834Z
CREATED:20220902T133330Z
DESCRIPTION:Topic: From Panchromatic Images to Stellar Ages and Beyond\n\nS
peakers: Joshua Speagle\n\nAffiliation: University of Toronto\n\nLarge-are
a surveys such as Gaia have given us an unprecedented amount\nof data on s
tars in the Milky Way. One of the largest ongoing\nchallenges in understan
ding the present-day structure and formation\nhistory of our Galaxy (i.e.
Galactic archaeology) involves converting\nthese data into estimates of st
ellar properties such as distances\,\nmetallicities\, and ages. In this ta
lk\, I will outline some of the\nfundamental statistical and computational
challenges involved in this\nprocess\, the approaches my collaborators an
d I have taken to solve\nthem\, and the preliminary successes applying the
se approaches to large\ndatasets (including some fun interactive data visu
alizations). If time\npermits\, I will also plan to discuss ongoing work u
sing probabilistic\nmachine learning to expand on these results with new l
ow-resolution\nBPRP spectra from Gaia DR3\, as well as associated efforts
to ensure\nthese approaches can successfully disentangle stellar age estim
ation\nfrom Galactic chemodynamical evolution.
DTSTART:20220922T150000Z
DTEND:20220922T160000Z
LAST-MODIFIED:20220902T133426Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-47
END:VEVENT
BEGIN:VEVENT
UID:63303563-3634-4265-b830-643233633763
DTSTAMP:20220928T084834Z
CREATED:20220720T192213Z
DESCRIPTION:Topic: (Algebraic) Invariants from Geometry\n\nSpeakers: Ipsita
Datta\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220922T180000Z
DTEND:20220922T181500Z
LAST-MODIFIED:20220922T200608Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-580
END:VEVENT
BEGIN:VEVENT
UID:66383134-6665-4237-b338-393866653235
DTSTAMP:20220928T084834Z
CREATED:20220902T134321Z
DESCRIPTION:Topic: Searching for Signposts of Failed White Dwarf Supernovae
\n\nSpeakers: JJ Hermes\n\nAffiliation: Boston University\n\nType Ia super
novae involve the thermonuclear detonation of white dwarf\nstars\, and are
an essential tool allowing us to study the Universe on\nvast scales. Howe
ver\, Type Ia supernovae are not the only byproducts\nof the mergers at th
e endpoints of binaries. I will discuss the\ngrowing number of observation
al signposts that can distinguish\npopulations of white dwarf stars that d
escend from failed Type Ia\nsupernovae. I will also discuss how space-base
d missions like Gaia\,\nKepler\, and TESS have allowed us better select me
rger byproducts among\nthe population of typical stellar remnants\, allowi
ng us to better\ncharacterize the fossils in our nearby stellar graveyard.
DTSTART:20220922T180000Z
DTEND:20220922T190000Z
LAST-MODIFIED:20220902T134437Z
LOCATION:Serin Hall\, Room W330
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
20
END:VEVENT
BEGIN:VEVENT
UID:36356661-3162-4935-a663-613532653337
DTSTAMP:20220928T084834Z
CREATED:20220720T192243Z
DESCRIPTION:Topic: Simple zeros of L-functions\n\nSpeakers: Alexandre Peroz
im de Faveri\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220922T182000Z
DTEND:20220922T183500Z
LAST-MODIFIED:20220922T200748Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-581
END:VEVENT
BEGIN:VEVENT
UID:66346266-6330-4336-b664-353538373931
DTSTAMP:20220928T084834Z
CREATED:20220720T192314Z
DESCRIPTION:Topic: On the stability of functional and geometric inequalitie
s\n\nSpeakers: Federico Glaudo\n\nAffiliation: Member\, School of Mathemat
ics
DTSTART:20220922T184000Z
DTEND:20220922T185500Z
LAST-MODIFIED:20220922T200854Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-582
END:VEVENT
BEGIN:VEVENT
UID:32623939-6331-4034-b437-626439626564
DTSTAMP:20220928T084834Z
CREATED:20220720T193755Z
DESCRIPTION:Topic: Algorithmic Spin Glass Theory\n\nSpeakers: Mark Sellke\n
\nAffiliation: Member\, School of Mathematics
DTSTART:20220922T200000Z
DTEND:20220922T201500Z
LAST-MODIFIED:20220923T123438Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-595
END:VEVENT
BEGIN:VEVENT
UID:62306364-6561-4737-b335-663865393061
DTSTAMP:20220928T084834Z
CREATED:20220720T193845Z
DESCRIPTION:Topic: Floer Theory on Complex-Symplectic Manifolds\n\nSpeakers
: Semon Kirillovich Rezchikov\n\nAffiliation: Member\, School of Mathemati
cs
DTSTART:20220922T202000Z
DTEND:20220922T203500Z
LAST-MODIFIED:20220923T123633Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-596
END:VEVENT
BEGIN:VEVENT
UID:36313737-6239-4839-a132-383934373237
DTSTAMP:20220928T084834Z
CREATED:20220720T193946Z
DESCRIPTION:Topic: Exit-path categories in geometry and topology\n\nSpeaker
s: Peter James Haine\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220922T204000Z
DTEND:20220922T205500Z
LAST-MODIFIED:20220923T124215Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-597
END:VEVENT
BEGIN:VEVENT
UID:37656235-6262-4239-a463-373064333334
DTSTAMP:20220928T084834Z
CREATED:20220919T144056Z
DESCRIPTION:Topic: Arithmetic holonomy bounds and Apery limits\n\nSpeakers:
Vesselin Dimitrov\n\nAffiliation: Member\, School of Mathematics\n\nA Dio
phantine upper bound on the dimensions of certain spaces of\nholonomic fun
ctions was the main ingredient in our proof with Calegari\nand Tang of the
'unbounded denominators conjecture' (presented by Tang\nin last year's nu
mber theory seminar) from the theory of\nnon-congruence and vector-valued
modular forms. In this talk\, I will\nreport on our sequel joint work-in-p
rogress where we extend the scope\nof these arithmetic holonomy bounds to
beneath the framework of finite\nindex subgroups of SL_2(Z) and onto the a
rithmetic theory of certain\nperiods appearing as Apery limits for local s
ystems on the triply\npunctured projective line. Applications include irra
tionality proofs\,\nwith quantitative bad approximability measures\, of th
e 2-adic\nrealization of $\zeta(5)$\, the archimedean period $L(2\,\chi_{-
3}) -\n\pi(\log{3})/(3\sqrt{3})$\, and the products of two logarithms\n$\l
og(1-1/m)\log(1-1/n)$ for arbitrary integer pairs $n\, m$ with $0 <\n|1-m/
n| < \epsilon_0$\, where $\epsilon_0$ is some positive absolute\nconstant.
As a byproduct\, we find an arithmetic characterization of\nthe logarithm
function.
DTSTART:20220922T211000Z
DTEND:20220922T221000Z
LAST-MODIFIED:20220923T172507Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Joint IAS/PU Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iaspu-number-theory-seminar-9
END:VEVENT
BEGIN:VEVENT
UID:32363763-3836-4932-a430-653130393362
DTSTAMP:20220928T084834Z
CREATED:20220901T171252Z
DESCRIPTION:Topic: Algorithmic Thresholds for Mean-Field Spin Glasses\n\nSp
eakers: Mark Sellke\n\nI will explain recent progress on computing approxi
mate ground states\nof mean-field spin glass Hamiltonians\, which are cert
ain random\nfunctions in high dimension. While the asymptotic ground state
energy\nOPT is given by the famous Parisi formula\, these functions often
have\nmany bad local optima which are believed to impede simple algorithm
s\nsuch as gradient descent. In the positive direction\, I will discuss\na
lgorithms based on approximate message passing which asymptotically\nachie
ve a value ALG given by an extended Parisi formula. The case\nALG=OPT has
a 'no overlap gap' or 'full replica symmetry breaking'\ninterpretation\, b
ut in general ALG may be strictly smaller than OPT.\nIn the negative direc
tion\, I will explain why no algorithm with\nsuitably Lipschitz dependence
on the random disorder can do better\nthan ALG. The latter result applies
to many standard optimization\nalgorithms\, including gradient descent an
d Langevin dynamics on\ndimension-free time scales.\n\nBased on joint work
s with Ahmed El Alaoui\, Brice Huang\, and Andrea\nMontanari.
DTSTART:20220923T151500Z
DTEND:20220923T161500Z
LAST-MODIFIED:20220923T165654Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Probability Seminar
URL:https://www.ias.edu/math/events/probability-seminar-0
END:VEVENT
BEGIN:VEVENT
UID:64366234-3130-4362-a639-376539306466
DTSTAMP:20220928T084834Z
CREATED:20220923T195228Z
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:20220926T150000Z
DTEND:20220926T160000Z
LAST-MODIFIED:20220923T195313Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/sns/events/princeton-university-galread-galacticext
ragalactic-reading-group-48
END:VEVENT
BEGIN:VEVENT
UID:30353336-3662-4864-a165-643031393033
DTSTAMP:20220928T084834Z
CREATED:20220808T182859Z
DESCRIPTION:Topic: Making Proofs More Constructive\, and Algorithms Less Ra
ndom\n\nSpeakers: Oliver Korten\n\nAffiliation: Columbia University\n\nA c
entral topic in the theory of computation is\n_derandomization:_ say we ha
ve an algorithm which flips coins to\nachieve some goal\, and succeeds wit
h high probability. Can we\ntransform this algorithm into a deterministic
procedure\, while\nmaintaining most of its desirable behavior (i.e. effici
ency and\ncorrectness)? \n\nA similar (though more informal) question aris
es frequently in\ncombinatorics: say we have a non-constructive proof of t
he existence\nof some object. Can we replace this proof with a more\n“cons
tructive” argument\, without weakening the result too much?\n\nIn this wor
k we will show some formal connections between these two\nsorts of questio
ns\, using the framework of “total search\nproblems.” This framework will
allow us to establish new relations\namongst outstanding complexity-theore
tic problems pertaining to\nboolean circuit-size lower bounds\, time-space
tradeoffs for turing\nmachines\, and deterministic constructions of vario
us combinatorial\nobjects.
DTSTART:20220926T151500Z
DTEND:20220926T161500Z
LAST-MODIFIED:20220926T123922Z
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-514
END:VEVENT
BEGIN:VEVENT
UID:36653431-3035-4836-a238-653164313133
DTSTAMP:20220928T084834Z
CREATED:20220923T195342Z
DESCRIPTION:Topic: The Interplay Between Stellar Flares and Infrared Transm
ission Spectroscopy to Trace Exoplanet Atmospheric Chemistry and Mass Loss
\n\nSpeakers: Adina Feinstein\n\nAffiliation: University of Chicago\n\nHig
h energy stellar irradiation is believed to control atmospheric\nchemistry
in and mass loss of short-period planets. These effects are\nintensified
in the earliest stages of planetary evolution because\nyoung stars are mor
e active and produce extreme levels of X-ray and\nUltraviolet (UV) radiati
on. Observational constraints on star-planet\ninteractions for short-perio
d planets provide insight into the\nearliest evolutionary stages of the ~5
000 older extrasolar planets\ncurrently identified. In this talk\, I will
present several benchmark\nstudies of early stage activity and star planet
interactions that draw\nupon UV\, optical\, and infrared wavelength obser
vations. I will present\nthe results of five hours of Far-UV observations
of the 25 Myr M dwarf\nAU Mic obtained by the Cosmic Origins Spectrograph
on the Hubble Space\nTelescope. To interpret these observations in the con
text of AU Mic b\nand c\, I will present models of flare-driven atmospheri
c escape and\nmodeled infrared transmission spectra \, relevant for future
\natmospheric characterization with JWST. Finally\, I will present the\nin
frared transmission spectrum of WASP-39b as observed with the Near\nInfrar
ed Imager and Slitless Spectrograph (NIRISS) on JWST\, which I\nhave been
leading as part of the JWST Early Release Science program.
DTSTART:20220926T160000Z
DTEND:20220926T170000Z
LAST-MODIFIED:20220923T195512Z
LOCATION:Peyton Hall\, Dome Room
SUMMARY:Princeton University Extrasolar Planet Discussion Group
URL:https://www.ias.edu/sns/events/princeton-university-extrasolar-planet-d
iscussion-group-59
END:VEVENT
BEGIN:VEVENT
UID:33323532-6134-4330-b137-393233303633
DTSTAMP:20220928T084834Z
CREATED:20220923T193941Z
DESCRIPTION:Topic: Chern-Simons Gravity and Neutrino Self-Interactions\n\nS
peakers: Cyril Creque-Sarbinowski\n\nAffiliation: CCA\n\nDynamical Chern-S
imons gravity (dCS) is a four-dimensional\nparity-violating extension of g
eneral relativity. Current models\npredict the effect of this extension to
be negligible due to large\ndecay constants f close to the scale of grand
unified theories. Here\,\nwe present a construction of dCS allowing for m
uch smaller decay\nconstants\, ranging from sub-eV to Planck scales. Speci
fically\, we show\nthat if there exists a fermion species with strong self
-interactions\,\nthe short-wavelength fermion modes form a bound state. Th
is bound\nstate can then undergo dynamical symmetry breaking and the resul
ting\npseudoscalar develops Yukawa interactions with the remaining\nlong-w
avelength fermion modes. Due to this new interaction\, loop\ncorrections w
ith gravitons then realize a linear coupling between the\npseudoscalar and
the gravitational Chern-Simons term. The strength of\nthis coupling is se
t by the Yukawa coupling constant divided by the\nfermion mass. Therefore\
, since self-interacting fermions with small\nmasses are ideal\, we identi
fy neutrinos as promising candidates. For\nexample\, if a neutrino has a m
ass mν ≲meV and the Yukawa coupling\nis order unity\, the dCS decay consta
nt can be as small as f∼10^3mν\n≲eV. We discuss other potential choices fo
r fermions.
DTSTART:20220926T163000Z
DTEND:20220926T180000Z
LAST-MODIFIED:20220923T194033Z
LOCATION:West Building Seminar
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-47
END:VEVENT
BEGIN:VEVENT
UID:66306438-3366-4861-b133-633761343536
DTSTAMP:20220928T084834Z
CREATED:20220808T191625Z
DESCRIPTION:Topic: Robust sublinear expanders\, and an application towards
the Erdos-Gallai conjecture\n\nSpeakers: Matija Bucic\n\nAffiliation: Vebl
en Research Instructor\, School of Mathematics\n\nExpander graphs have bee
n perhaps one of the most widely useful\nclasses of graphs ever considered
. In this talk we will focus on a\nfairly weak notion of expanders called
sublinear expanders\, first\nintroduced by Komlos and Szemeredi around 25
years ago. They have\nfound many remarkable applications ever since. In pa
rticular we will\nfocus on certain robustness conditions one may impose on
sublinear\nexpanders while still maintaining their most useful property\,
the fact\nthat in any graph one can find a sublinear expander subgraph of
almost\nthe same density. We will discuss a number of useful properties o
f\nsuch robust sublinear expanders and show how they come together to\nbri
ng us only a $\log^{\star}$ factor away from proving one of the\nmost clas
sical decomposition conjectures\, the Erdos-Gallai cycle\ndecomposition co
njecture.\n\nBased on joint work with Richard Montgomery.
DTSTART:20220927T143000Z
DTEND:20220927T163000Z
LAST-MODIFIED:20220927T130400Z
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-512
END:VEVENT
BEGIN:VEVENT
UID:66353736-3464-4334-b038-353862623762
DTSTAMP:20220928T084834Z
CREATED:20220902T131454Z
DESCRIPTION:The Bahcall Lunch follow the astrophysics colloquium\nlecture.
REGISTRATION IS REQUIRED BY 3PM THE PREVIOUS FRIDAY SO A\nMEAL CAN BE PROV
IDED. Please contact Amanda Cenker with questions.
DTSTART:20220927T163000Z
DTEND:20220927T173000Z
LAST-MODIFIED:20220902T131510Z
LOCATION:Simons Hall Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-26
END:VEVENT
BEGIN:VEVENT
UID:33386264-3035-4465-b934-633366393561
DTSTAMP:20220928T084834Z
CREATED:20220720T184059Z
DESCRIPTION:Topic: Systolic inequalities\n\nSpeakers: Alexey Balitskiy\n\nA
ffiliation: Member\, School of Mathematics
DTSTART:20220928T180000Z
DTEND:20220928T181500Z
LAST-MODIFIED:20220831T122700Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-574
END:VEVENT
BEGIN:VEVENT
UID:38626634-3063-4263-a430-666537643633
DTSTAMP:20220928T084834Z
CREATED:20220720T192353Z
DESCRIPTION:Topic: Calculations in the stable homotopy categories\n\nSpeake
rs: Hana Jia Kong\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220928T182000Z
DTEND:20220928T183500Z
LAST-MODIFIED:20220907T175156Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-583
END:VEVENT
BEGIN:VEVENT
UID:33643433-3139-4535-b233-323666386538
DTSTAMP:20220928T084834Z
CREATED:20220720T192509Z
DESCRIPTION:Topic: Endoscopy for affine Hecke categories\n\nSpeakers: Yau W
ing Li\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220928T184000Z
DTEND:20220928T185500Z
LAST-MODIFIED:20220909T150602Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-584
END:VEVENT
BEGIN:VEVENT
UID:61666530-3564-4763-b438-626338623239
DTSTAMP:20220928T084834Z
CREATED:20220721T115320Z
DESCRIPTION:Topic: A sum-product phenomenon and arithmeticity of discrete s
ubsets of Lie groups\n\nSpeakers: Simon Machado\n\nAffiliation: Member\, S
chool of Mathematics
DTSTART:20220928T200000Z
DTEND:20220928T201500Z
LAST-MODIFIED:20220908T115912Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-598
END:VEVENT
BEGIN:VEVENT
UID:33396136-3963-4535-b763-313061336162
DTSTAMP:20220928T084834Z
CREATED:20220721T115355Z
DESCRIPTION:Topic: On new and exotic contact manifolds\n\nSpeakers: Agustin
Moreno\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220928T202000Z
DTEND:20220928T203500Z
LAST-MODIFIED:20220817T145535Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-600
END:VEVENT
BEGIN:VEVENT
UID:62626234-6635-4363-b866-303764643132
DTSTAMP:20220928T084834Z
CREATED:20220721T115421Z
DESCRIPTION:Topic: Convex polytopes from fewer points\n\nSpeakers: Cosmin P
ohoata\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220928T204000Z
DTEND:20220928T205500Z
LAST-MODIFIED:20220907T205310Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-599
END:VEVENT
BEGIN:VEVENT
UID:31336163-3235-4630-a439-376161633738
DTSTAMP:20220928T084834Z
CREATED:20220923T200610Z
DESCRIPTION:Topic: How does stellar feedback in star-forming regions depend
on environment?\n\nSpeakers: Ahmad Ali\n\nAffiliation: University of Exet
er
DTSTART:20220929T133000Z
DTEND:20220929T143000Z
LAST-MODIFIED:20220923T200657Z
LOCATION:Hybrid - Zoom and Peyton Dome Rm
SUMMARY:Princeton University Star Formation/ISM Rendezvous (SFIR)
URL:https://www.ias.edu/sns/events/princeton-university-star-formationism-r
endezvous-sfir-27
END:VEVENT
BEGIN:VEVENT
UID:35656433-3765-4437-b063-316665663731
DTSTAMP:20220928T084834Z
CREATED:20220902T133432Z
DESCRIPTION:Topic: Count your halos\n\nSpeakers: Annika Peter\n\nAffiliatio
n: IAS/Ohio State University\n\nOne of the strongest predictions of the st
andard cold dark matter\nparadigm is the hierarchy of structure down to Ea
rth-mass scales. \nHowever\, individual self-bound clumps of dark matter--
'halos'--are\ndifficult to detect directly. Instead\, we use galaxies as
lampposts\nfor halos. By counting galaxies\, we can measure the underlyin
g\npopulation of dark matter halos. In this talk\, I describe results\nth
at seem completely at odds with each other in measuring the\npopulation of
small halos. I argue that the resolution to the\nproblem is a better map
ping between galaxies and halos. I will show\nwhat my group is doing so f
ar to address the problem\, and what\nopportunities lie ahead in the wide-
field surveys of the 2020's.
DTSTART:20220929T150000Z
DTEND:20220929T160000Z
LAST-MODIFIED:20220922T135036Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-48
END:VEVENT
BEGIN:VEVENT
UID:31363765-3963-4734-a334-386133373164
DTSTAMP:20220928T084834Z
CREATED:20220720T192801Z
DESCRIPTION:Topic: Deformations of homotopy theories\n\nSpeakers: Piotr Pst
ragowski\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220929T180000Z
DTEND:20220929T181500Z
LAST-MODIFIED:20220905T203410Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-586
END:VEVENT
BEGIN:VEVENT
UID:33333532-3736-4435-a233-343264643339
DTSTAMP:20220928T084834Z
CREATED:20220720T192850Z
DESCRIPTION:Topic: Random surfaces and conformal field theory\n\nSpeakers:
Guillaume Remy\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220929T182000Z
DTEND:20220929T183500Z
LAST-MODIFIED:20220907T121232Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-587
END:VEVENT
BEGIN:VEVENT
UID:34646134-3339-4437-a631-643562386536
DTSTAMP:20220928T084834Z
CREATED:20220720T192927Z
DESCRIPTION:Topic: Translational tilings\n\nSpeakers: Rachel Greenfeld\n\nA
ffiliation: Member\, School of Mathematics
DTSTART:20220929T184000Z
DTEND:20220929T185500Z
LAST-MODIFIED:20220907T121935Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-588
END:VEVENT
BEGIN:VEVENT
UID:31656237-6639-4133-a161-303339303338
DTSTAMP:20220928T084834Z
CREATED:20220721T121658Z
DESCRIPTION:Topic: On the Erdős sumset conjectures\n\nSpeakers: Florian K R
ichter\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220929T200000Z
DTEND:20220929T201500Z
LAST-MODIFIED:20220908T185147Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-602
END:VEVENT
BEGIN:VEVENT
UID:39616566-6637-4538-b733-376133343762
DTSTAMP:20220928T084834Z
CREATED:20220721T121729Z
DESCRIPTION:Topic: A Glimpse of Expansion in CS\n\nSpeakers: Fernando Granh
a Jeronimo\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220929T202000Z
DTEND:20220929T203500Z
LAST-MODIFIED:20220908T120018Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-603
END:VEVENT
BEGIN:VEVENT
UID:64326636-3739-4363-b037-616333646535
DTSTAMP:20220928T084834Z
CREATED:20220927T203540Z
DESCRIPTION:Topic: Higher Hida theory\n\nSpeakers: Vincent Pilloni\n\nAffil
iation: ENS\, Lyon\n\nModular forms are degree zero cohomology of certain
invertible sheaves\non modular curves. One is often led to consider also h
igher cohomology\nof automorphic vector bundles on Shimura varieties. We t
ry to define\nand understand the integral coherent cohomology for Siegel m
odular\nvarieties (and the Hecke action). If we restrict to the ordinary p
art\,\nthis is possible. One key ingredient is the cohomology with partial
\nsupport of the ordinary Igusa variety.\n\nThis is joint work with G. Box
er.
DTSTART:20220929T203000Z
DTEND:20220929T213000Z
LAST-MODIFIED:20220927T204225Z
LOCATION:Zoom
SUMMARY:Joint IAS/PU Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iaspu-number-theory-seminar-10
END:VEVENT
BEGIN:VEVENT
UID:31356565-3439-4365-b265-386332643637
DTSTAMP:20220928T084834Z
CREATED:20220721T121752Z
DESCRIPTION:Topic: The structure of measure preserving systems associated w
ith Szemerédi's theorem\n\nSpeakers: Or Shalom\n\nAffiliation: Member\, Sc
hool of Mathematics
DTSTART:20220929T204000Z
DTEND:20220929T205500Z
LAST-MODIFIED:20220920T125838Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-601
END:VEVENT
BEGIN:VEVENT
UID:61363661-3065-4131-b239-366665626236
DTSTAMP:20220928T084834Z
CREATED:20220901T174256Z
DESCRIPTION:Topic: TBD
DTSTART:20220930T151500Z
DTEND:20220930T161500Z
LAST-MODIFIED:20220908T133457Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Probability Seminar
URL:https://www.ias.edu/math/events/probability-seminar-1
END:VEVENT
BEGIN:VEVENT
UID:64376365-6661-4638-a436-646131366634
DTSTAMP:20220928T084834Z
CREATED:20220923T201245Z
DESCRIPTION:Topic: Shock acceleration in the inhomogeneous interstellar med
ium\n\nSpeakers: Siyao Xu\n\nAffiliation: The Institute for Advanced Study
\n\nWith the development of multi-messenger astronomy and the detection of
\nastrophysical neutrinos\, we are in a golden age of new cosmic ray (CR)
\nmeasurements and studies. Supernova remnants are believed as the\nleadin
g candidate for the source of Galactic CRs. Recent observations\,\nhowever
\, challenge the well-developed theory of diffusive shock\nacceleration of
CRs in supernova remnants. I will reexamine the\nassumptions in the stand
ard shock acceleration model and discuss the\nkey missing physics for shoc
ks propagating in the turbulent and\ninhomogeneous interstellar medium. A
more realistic shock acceleration\nmodel holds the promise to understand t
he observational puzzles and\nthe origin of Galactic CRs.
DTSTART:20220930T163000Z
DTEND:20220930T180000Z
LAST-MODIFIED:20220923T201323Z
LOCATION:Dome Room\, Peyton Hall or Zoom
SUMMARY:Princeton University Astroplasmas Seminar
URL:https://www.ias.edu/sns/events/princeton-university-astroplasmas-semina
r-27
END:VEVENT
BEGIN:VEVENT
UID:30316539-3963-4365-b239-376364653461
DTSTAMP:20220928T084834Z
CREATED:20220721T122053Z
DESCRIPTION:Topic: Arithmetic quantum unique ergodicity\n\nSpeakers: Zvi Sh
em-Tov\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220930T180000Z
DTEND:20220930T181500Z
LAST-MODIFIED:20220907T203404Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-604
END:VEVENT
BEGIN:VEVENT
UID:62346266-3335-4130-b139-376566393135
DTSTAMP:20220928T084834Z
CREATED:20220721T122135Z
DESCRIPTION:Topic: On class groups of monogenic fields\n\nSpeakers: Artane
Jeremie Siad\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220930T182000Z
DTEND:20220930T183500Z
LAST-MODIFIED:20220915T113148Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-605
END:VEVENT
BEGIN:VEVENT
UID:66623637-6237-4131-b461-393663663136
DTSTAMP:20220928T084834Z
CREATED:20220721T122252Z
DESCRIPTION:Topic: Closing lemmas and pseudoholomorphic curves\n\nSpeakers:
Shira Tanny\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220930T184000Z
DTEND:20220930T185500Z
LAST-MODIFIED:20220909T123757Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-606
END:VEVENT
BEGIN:VEVENT
UID:30336561-6566-4637-b463-643431336332
DTSTAMP:20220928T084834Z
CREATED:20220721T122401Z
DESCRIPTION:Topic: Randomness in Algorithms: Understanding It\, Eliminating
It\n\nSpeakers: Roei Tell\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220930T190000Z
DTEND:20220930T191500Z
LAST-MODIFIED:20220906T193607Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-607
END:VEVENT
BEGIN:VEVENT
UID:65613039-3838-4962-a232-636563363762
DTSTAMP:20220928T084834Z
CREATED:20220721T122640Z
DESCRIPTION:Topic: Almost primes in short intervals\n\nSpeakers: Joni Teräv
äinen\n\nAffiliation: Member\, School of Mathematics
DTSTART:20220930T200000Z
DTEND:20220930T201500Z
LAST-MODIFIED:20220906T121540Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-608
END:VEVENT
BEGIN:VEVENT
UID:38313066-6463-4235-b636-306231623131
DTSTAMP:20220928T084834Z
CREATED:20220721T122722Z
DESCRIPTION:Topic: It ain't over till it's over\n\nSpeakers: Pei Wu\n\nAffi
liation: Member\, School of Mathematics
DTSTART:20220930T202000Z
DTEND:20220930T203500Z
LAST-MODIFIED:20220906T121455Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-609
END:VEVENT
BEGIN:VEVENT
UID:30666532-6332-4733-b663-313463326666
DTSTAMP:20220928T084834Z
CREATED:20220721T122820Z
DESCRIPTION:Topic: Poincaré Duality\n\nSpeakers: Bogdan Zavyalov\n\nAffilia
tion: Member\, School of Mathematics
DTSTART:20220930T204000Z
DTEND:20220930T205500Z
LAST-MODIFIED:20220905T134341Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Short Talks by Postdoctoral Members
URL:https://www.ias.edu/math/events/short-talks-postdoctoral-members-610
END:VEVENT
BEGIN:VEVENT
UID:64623638-6438-4766-b732-333965326237
DTSTAMP:20220928T084834Z
CREATED:20220808T182924Z
DESCRIPTION:Topic: Relative rank and regularity\n\nSpeakers: Tamar Ziegler
\n\nAffiliation: Hebrew University\; Distinguished Visiting Professor\, Sc
hool of Mathematics\n\nThe notion of Schmidt rank/strength for a collectio
n of m polynomials\nplays an important role in additive combinatorics\, nu
mber theory and\ncommutative algebra\; high rank collections of polynomial
s are\n“psuedorandom”. An arbitrary collection of polynomials is not\nnec
essarily of high rank\, but via a regularity procedure is contained\nin an
ideal generated by a huge (depending on m) high rank collection\nof polyn
omials. We describe a refined notion of rank/strength that\nallows for a n
ew regularization procedure with polynomial dependence\non m\, while maint
aining the psuedorandomess properties.\n\nJoint work with A. Lampert.\n\n
DTSTART:20221003T151500Z
DTEND:20221003T161500Z
LAST-MODIFIED:20220922T123417Z
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-515
END:VEVENT
BEGIN:VEVENT
UID:65313861-6530-4330-b162-633436613038
DTSTAMP:20220928T084834Z
CREATED:20220818T181302Z
DESCRIPTION:Topic: Polynomials over $\mathbb{Z}$ and $\mathbb{Q}$: counting
and freeness\n\nSpeakers: Timothy Browning\n\nAffiliation: Member\, Schoo
l of Mathematics\n\nHumans have been thinking about polynomial equations o
ver the\nintegers\, or over the rational numbers\, for many years. Despite
this\,\ntheir secrets are tightly locked up and it is hard to know what t
o\nexpect\, even in simple looking cases. In this talk I’ll discuss\nrecen
t efforts to understand the frequency of integer solutions to\ncubic polyn
omials\, before turning to the much more evolved picture\nover the rationa
l numbers.
DTSTART:20221003T180000Z
DTEND:20221003T190000Z
LAST-MODIFIED:20220923T173147Z
LOCATION:Simonyi Hall 101 and Remote Access - see Zoom link below
SUMMARY:Members' Colloquium
URL:https://www.ias.edu/math/events/members-colloquium-33
END:VEVENT
BEGIN:VEVENT
UID:66633530-3866-4565-b366-353761353035
DTSTAMP:20220928T084834Z
CREATED:20220825T180148Z
DESCRIPTION:Topic: Arnold conjecture over Z\n\nSpeakers: Guangbo Xu\n\nAffi
liation: Texas A&M University\; Member\, School of Mathematics\n\nArnold's
famous conjecture on the numbers of fixed points of\nHamiltonian diffeomo
rphisms on symplectic manifolds has motivated\nnumerous important developm
ents in geometry and topology\, most notably\nthe invention of Floer homol
ogy. In this talk I will present the\nrecent proof of the integral version
of the Arnold conjecture: on any\nclosed symplectic manifold\, the number
of fixed points of a\nnondegenerate Hamiltonian diffeomorphism is bounded
from below by a\nversion of total Betti number over ${\mathbb Z}$ which t
akes accounts\nof torsions of all characteristics. This result strengthens
the\nrational version proved by Fukaya-Ono and Liu-Tian as well as the\nf
inite field version proved recently by Abouzaid-Blumberg. The most\ncrucia
l inputs of the proof are 1) Fukaya-Ono's idea of integral\ncounting of ho
lomorphic curves\, the detail of which has been worked\nout recently by a
previous joint work with Shaoyun Bai\, and 2) the\nconstruction of global
Kuranishi charts for the Hamiltonian Floer flow\ncategory which generalize
s the recent work of Abouzaid-McLean-Smith.\nThis talk is based on the joi
nt work with Shaoyun Bai (arxiv:\n2209.08599).
DTSTART:20221003T200000Z
DTEND:20221003T213000Z
LAST-MODIFIED:20220926T201620Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Joint IAS/Princeton University Symplectic Geometry Seminar
URL:https://www.ias.edu/math/events/joint-iasprinceton-university-symplecti
c-geometry-seminar-191
END:VEVENT
BEGIN:VEVENT
UID:36646161-3836-4838-b634-383264303462
DTSTAMP:20220928T084834Z
CREATED:20220808T191647Z
DESCRIPTION:Topic: TBD\n\nSpeakers: Fernando Granha Jeronimo\n\nAffiliation
: Member\, School of Mathematics
DTSTART:20221004T143000Z
DTEND:20221004T163000Z
LAST-MODIFIED:20220906T123817Z
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-513
END:VEVENT
BEGIN:VEVENT
UID:61303239-3364-4964-b938-373061653934
DTSTAMP:20220928T084834Z
CREATED:20220902T131528Z
DESCRIPTION:The Bahcall Lunch follow the astrophysics colloquium\nlecture.
REGISTRATION IS REQUIRED BY 3PM THE PREVIOUS FRIDAY SO A\nMEAL CAN BE PROV
IDED. Please contact Amanda Cenker with questions.
DTSTART:20221004T163000Z
DTEND:20221004T173000Z
LAST-MODIFIED:20220902T131542Z
LOCATION:Simons Hall Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/sns/events/institute-advanced-study-princeton-unive
rsity-bahcall-lunch-27
END:VEVENT
BEGIN:VEVENT
UID:63373738-6435-4637-a232-343138313261
DTSTAMP:20220928T084834Z
CREATED:20220831T144537Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Mariusz Mirek\n\nAffiliatio
n: Rutgers University\; Member\, School of Mathematics\n\nTo Be Announced
DTSTART:20221004T180000Z
DTEND:20221004T190000Z
LAST-MODIFIED:20220922T172852Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Research Seminar
URL:https://www.ias.edu/math/events/special-year-research-seminar-2
END:VEVENT
BEGIN:VEVENT
UID:66623566-3536-4331-a332-613763613038
DTSTAMP:20220928T084834Z
CREATED:20220922T172921Z
DESCRIPTION:Topic: To Be Announced\n\nSpeakers: Adam Kanigowski \n\nAffilia
tion: University of Maryland\n\nTo Be Announced
DTSTART:20221004T193000Z
DTEND:20221004T203000Z
LAST-MODIFIED:20220922T173159Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Research Seminar
URL:https://www.ias.edu/math/events/special-year-research-seminar-4
END:VEVENT
BEGIN:VEVENT
UID:61653262-6465-4938-b335-663465666230
DTSTAMP:20220928T084834Z
CREATED:20220906T184505Z
DESCRIPTION:Topic: Lipschitz rigidity for scalar curvature\n\nSpeakers: Ber
nhard Hanke\n\nAffiliation: University of Augsburg\, Member\, School of Ma
thematics\n\nLower scalar curvature bounds on spin Riemannian manifolds ex
hibit\nremarkable rigidity properties determined by spectral properties of
\nDirac operators. For instance\, a fundamental result of Llarull states\n
that there is no smooth Riemannian metric on the n-sphere which\ndominates
the round metric and whose scalar curvature is greater than\nor equal to
the scalar curvature of the round metric\, except the round\nmetric itself
. A similar result holds for smooth comparison maps from\nspin Riemannian
manifolds to round spheres. In a joint work with\nSimone Cecchini and Thom
as Schick\, we generalize this result to\nRiemannian metrics with regulari
ty less than C^1 and Lipschitz\ncomparison maps\, answering a question of
Gromov in his 'Four\nLectures'. To this end\, we rely on a notion of scala
r curvature in the\ndistributional sense introduced by Lee-LeFloch and on
spectral\nproperties of Lipschitz Dirac operators. It turns out that the\n
existence of a nonzero harmonic spinor field - guaranteed by the\nAtiyah-S
inger index theorem - forces the given comparison map to be\nquasiregular
in the sense of Reshetnyak. Thus we build an unexpected\nbridge from spin
geometry to the theory of quasiconformal mappings.
DTSTART:20221005T203000Z
DTEND:20221005T213000Z
LAST-MODIFIED:20220923T170816Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Analysis & Mathematical Physics
URL:https://www.ias.edu/math/events/analysis-mathematical-physics
END:VEVENT
BEGIN:VEVENT
UID:39306332-3639-4538-a535-666434626431
DTSTAMP:20220928T084834Z
CREATED:20220810T125052Z
DESCRIPTION:Topic: TBD
DTSTART:20221005T220000Z
DTEND:20221006T000000Z
LAST-MODIFIED:20220810T125948Z
LOCATION:Birch Garden\, Simons Hall
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/math/events/mathematical-conversations-239
END:VEVENT
BEGIN:VEVENT
UID:32373036-6466-4666-b364-366266306632
DTSTAMP:20220928T084834Z
CREATED:20220920T170312Z
DESCRIPTION:Speakers: Jan Draisma\n\nAffiliation: Universität Bern\; Membe
r\, School of Mathematics \n\nTo Be Announced
DTSTART:20221006T143000Z
DTEND:20221006T160000Z
LAST-MODIFIED:20220920T170807Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Special Year Learning Seminar
URL:https://www.ias.edu/math/events/special-year-learning-seminar-0
END:VEVENT
BEGIN:VEVENT
UID:32303466-3431-4263-b538-323263633461
DTSTAMP:20220928T084834Z
CREATED:20220902T133537Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Kunihito Ioka\n\nAffiliation: Yukawa In
stitute for Theoretical Physics\, Kyoto University
DTSTART:20221006T150000Z
DTEND:20221006T160000Z
LAST-MODIFIED:20220902T133630Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/sns/events/institute-advanced-study-astrophysics-se
minar-49
END:VEVENT
BEGIN:VEVENT
UID:66343161-3231-4939-b161-373034643839
DTSTAMP:20220928T084834Z
CREATED:20220902T134453Z
DESCRIPTION:Topic: Andromeda as a Stepping Stone to the Local Volume: Resol
ved Stellar Chemodynamics of Extragalactic Streams\, Shells\, and Disks\n
\nSpeakers: Ivanna Escala\n\nAffiliation: Princeton University\n\nModern s
pectroscopic studies of resolved stellar populations in\nAndromeda (M31) w
ill connect the Milky Way (MW) to future observations\nof disk galaxies in
the Local Volume. Thus\, our understanding of M31's\nmerger history will
be a foundation upon which we interpret this next\nobservational frontier.
Outstanding questions remain concerning M31's\nassembly history: has its
disk survived a major merger within the last\nfew billion years\, and does
this merger coincide with the formation of\nM31's Giant Stellar Stream (G
SS) and its various tidal shells? In this\ntalk\, I will present novel res
ults from the Spectroscopic and\nPhotometric Landscape of Andromeda's Stel
lar Halo (SPLASH) survey on\nM31's Northeast (NE) Shelf\, in addition to M
31's inner stellar halo\nalong the disk major axis. I will show that the s
helf agrees with\nexpectations of a tidal shell formed in a radial merger
and provides\nstrong evidence in favor of GSS formation models where it or
iginates\nfrom the second orbital wrap of the tidal debris. Although remna
nts\nfrom this merger are predicted to pollute the major-axis halo\, I wil
l\ndemonstrate that this stellar component is distinct from the NE Shelf\,
\nas well as the stellar halo along the minor axis that is far from the\nd
isk. These data represent the first complete kinematical detection of\na r
esolved galactic shell system in the local universe and the first\nlarge-s
cale chemodynamical analysis of M31's northeastern disk region.\nI will co
nclude by discussing the implications of these results for\nM31's formatio
n history in the context of the MW.
DTSTART:20221006T180000Z
DTEND:20221006T190000Z
LAST-MODIFIED:20220902T134554Z
LOCATION:Serin Hall\, Room W330
SUMMARY:Rutgers University Astrophysics Seminar
URL:https://www.ias.edu/sns/events/rutgers-university-astrophysics-seminar-
21
END:VEVENT
BEGIN:VEVENT
UID:37633738-3733-4733-b930-623431636364
DTSTAMP:20220928T084834Z
CREATED:20220830T172923Z
DESCRIPTION:Topic: A visit to 3-manifolds in the quest to understand random
Galois groups\n\nSpeakers: Will Sawin\n\nAffiliation: Columbia University
\n\nCohen and Lenstra gave a conjectural distribution for the class group
\nof a random quadratic number field. Since the class group is the\nGalois
group of the maximum abelian unramified extension\, a natural\ngeneraliza
tion would be to give a conjecture for the distribution of\nthe Galois gro
up of the maximal unramified extension. Previous work\nhas produced a plau
sible conjecture in special cases\, with the most\ngeneral being recent wo
rk of Liu\, Wood\, and Zurieck-Brown. There is a\ndeep analogy between num
ber fields and 3-manifolds. Thus\, an analogous\nquestion would be to desc
ribe the distribution of the profinite\ncompletion of the fundamental grou
p of a random 3-manifold. In this\ntalk\, I will explain how Melanie Wood
and I answered this question for\na model of random 3-manifolds defined by
Dunfield and Thurston\, and\nhow the techniques we used should allow us\,
in future work\, to give a\nmore general conjecture in the number field c
ase.
DTSTART:20221006T203000Z
DTEND:20221006T213000Z
LAST-MODIFIED:20220920T123930Z
LOCATION:Simonyi Hall 101 and Remote Access
SUMMARY:Joint IAS/PU Number Theory Seminar
URL:https://www.ias.edu/math/events/joint-iaspu-number-theory-seminar
END:VEVENT
BEGIN:VEVENT
UID:36326564-3635-4135-a162-656237366364
DTSTAMP:20220928T084834Z
CREATED:20220901T174347Z
DESCRIPTION:Topic: TBD\n\nSpeakers: Alan Sly\n\nAffiliation: Princeton Univ
ersity
DTSTART:20221007T151500Z
DTEND:20221007T161500Z
LAST-MODIFIED:20220920T191810Z
LOCATION:Simonyi 101 and Remote Access
SUMMARY:Probability Seminar
URL:https://www.ias.edu/math/events/probability-seminar-2
END:VEVENT
BEGIN:VEVENT
UID:66363531-3566-4636-a164-623634336135
DTSTAMP:20220928T084834Z
CREATED:20220808T182957Z
DESCRIPTION:Topic: Is your distribution in shape? \n\nSpeakers: Ronitt Rub
infeld\n\nAffiliation: Massachusetts Institute of Technology\n\nAlgorithms
for understanding data generated from distributions over\nlarge discrete
domains are of fundamental importance. In this talk\,\nwe consider the sa
mple complexity of *property testing algorithms*\nthat seek to to distingu
ish whether or not an underlying distribution\nsatisfies basic shape prope
rties. Examples of such properties\ninclude convexity\, log-concavity\,
heavy-tailed\, and approximability by\nk-histogram functions. In this tal
k\, we will focus on the property\nof *monotonicity*\, as tools developed
for distinguishing the\nmonotonicity property have proven to be useful for
the all of the\nabove properties as well as several others. We say a dis
tribution p\nis 'monotone' if for any two comparable elements x