BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ca0b20f33713fd38fb8919aa30267bc2.ias.edu//NONSGML kigkonsult.se i
Calcreator 2.29.14//
CALSCALE:GREGORIAN
UID:efd100a9-5972-48d6-80aa-1cb6189dc857
X-WR-TIMEZONE:UTC
X-WR-CALNAME:IAS Academic
BEGIN:VEVENT
UID:f8fd5607-7801-4df5-8f7a-e2311e607bb4
DTSTAMP:20200812T123701Z
CREATED:20200423T184346Z
DESCRIPTION:Topic: Convex Set Disjointness\, Distributed Learning of Halfsp
aces\, and Linear Programming\n\nSpeaker: Shay Moran\, Member\, School of
Mathematics\n\nVideo: https://video.ias.edu/csdm/2020/0512-ShayMoran\n\nDi
stributed learning protocols are designed to train on distributed data wit
hout gathering it all on a single centralized machine\, thus contributing
to the efficiency of the system and enhancing its privacy. We study a cent
ral problem in distributed learning\, called Distributed Learning of Halfs
paces: let U \subset R^d be a known domain of size n and let h:R^d —> R be
an unknown target affine function. A set of examples {(u\,b)} is distribu
ted between several parties\, where u \in U is a point and b = sign(h(u))
\in {-1\, +1} is its label. The parties' goal is to agree\, using minimum
communication\, on a classifier f: U—>{-1\,+1} such that f(u)=b for every
input example (u\,b). (In practice\, the finite domain U is defined implic
itly by the representation of d-dimensional vectors which is used in the p
rotocol.) We establish a (nearly) tight bound of ~$\Theta$ (d*log n) on th
e communication complexity of the problem of distributed learning of halfs
paces in the two-party setting. Since this problem is closely related to t
he Convex Set Disjointness problem in communication complexity and the pro
blem of Distributed Linear Programming in distributed optimization\, we ar
e able to derive upper and lower bounds of ~O(d^2\log n) and ~Ω(d\log n) f
or both of these basic problems as well. Our main technical contribution l
ies in the design and analysis of the protocols which imply the upper boun
ds. To this end\, we introduce a technique called Halfspace Containers\, a
llowing for a compressed approximate representation of every halfspace. Ha
lfspace containers may be of independent interest and are closely related
to bracketing numbers in statistics and to hyperplane cuttings in discrete
geometry. Joint paper with Mark Braverman\, Gillat Kol\, and Raghuvansh R
Saxena
DTSTART:20200512T143000Z
DTEND:20200512T163000Z
LAST-MODIFIED:20200515T011733Z
LOCATION:https://theias.zoom.us/j/360043913
SUMMARY:Computer Science/Discrete Mathematics Seminar II
URL:https://www.ias.edu/node/110746
END:VEVENT
BEGIN:VEVENT
UID:4034e334-2af5-4eeb-bfd0-a6ac64c3f699
DTSTAMP:20200812T123701Z
CREATED:20200413T175029Z
DESCRIPTION:Topic: Quantitative decompositions of Lipschitz mappings\n\nSpe
aker: Guy C. David\, Ball State University\n\nGiven a Lipschitz map\, it i
s often useful to chop the domain into pieces on which the map has simple
behavior. For example\, depending on the dimensions of source and target\,
one may ask for pieces on which the map behaves like a bi-Lipschitz embed
ding or like a linear projection. For many issues\, it is even more useful
if this decomposition is quantitative\, i.e.\, with bounds independent of
the particular map or spaces involved. After surveying the question of bi
-Lipschitz decomposition\, we will discuss the more complicated case in wh
ich dimension decreases\, e.g.\, for maps from $\mathbb{R}^3$ to $\mathbb{
R}^2$.\n\nThis is recent joint work with Raanan Schul\, improving a previo
us result of Azzam-Schul.
DTSTART:20200512T150000Z
DTEND:20200512T160000Z
LAST-MODIFIED:20200515T011813Z
LOCATION:https://theias.zoom.us/j/562592856
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/node/110496
END:VEVENT
BEGIN:VEVENT
UID:7f014c53-26b1-41a2-b746-0d475d28e36c
DTSTAMP:20200812T123701Z
CREATED:20200506T110655Z
DESCRIPTION:Topic: Generative Modeling by Estimating Gradients of the Data
Distribution\n\nSpeaker: Stefano Ermon\, Stanford University\n\nVideo: htt
ps://video.ias.edu/machinelearning/2020/0512-StefanoErmon\n\nExisting gene
rative models are typically based on explicit representations of probabili
ty distributions (e.g.\, autoregressive or VAEs) or implicit sampling proc
edures (e.g.\, GANs). We propose an alternative approach based on modeling
directly the vector field of gradients of the data distribution (scores).
Our framework allows flexible energy-based model architectures\, requires
no sampling during training or the use of adversarial training methods. U
sing annealed Langevin dynamics\, we produces samples comparable to GANs o
n MNIST\, CelebA and CIFAR-10 datasets\, achieving a new state-of-the-art
inception score of 8.91 on CIFAR-10. Finally\, I will discuss challenges i
n evaluating bias and generalization in generative models.
DTSTART:20200512T160000Z
DTEND:20200512T173000Z
LAST-MODIFIED:20200515T011850Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/110876
END:VEVENT
BEGIN:VEVENT
UID:81559d69-373e-42a3-9de6-d38b32883d3b
DTSTAMP:20200812T123701Z
CREATED:20200506T112306Z
DESCRIPTION:Topic: The Simplicity Conjecture\n\nSpeaker: Daniel Cristofaro-
Gardiner\, University of California\, Santa Cruz\; von Neumann Fellow\, Sc
hool of Mathematics\n\nIn the 60s and 70s\, there was a flurry of activity
concerning the question of whether or not various subgroups of homeomorph
ism groups of manifolds are simple\, with beautiful contributions by Fathi
\, Kirby\, Mather\, Thurston\, and many others. A funnily stubborn case th
at remained open was the case of area-preserving homeomorphisms of surface
s. For example\, for balls of dimension at least 3\, the relevant group wa
s shown to be simple by work of Fathi in 1980\; but\, the answer in the tw
o-dimensional case\, asked by Mather in the 70s\, was not known. We recent
ly answered Mather's question by showing that the group of compactly suppo
rted area-preserving homeomorphisms of the two-disc is in fact not simple.
After surveying the history described above\, I will give a very gentle i
ntroduction to some of the key ideas in our proof\; what is crucial is the
fact that the 2-ball with its volume form is a symplectic manifold. Our w
ork underscores that it is natural to study continuous symplectic geometry
\, and I will briefly explain what this means.
DTSTART:20200513T213000Z
DTEND:20200513T230000Z
LAST-MODIFIED:20200509T185444Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/110881
END:VEVENT
BEGIN:VEVENT
UID:65885319-e2ff-422b-94cf-e72f55fa894f
DTSTAMP:20200812T123701Z
CREATED:20200420T122707Z
DESCRIPTION:Topic: A geometric view on Iwasawa theory\n\nSpeaker: Mladen D
imitrov\, Université de Lille\n\nVideo: https://video.ias.edu/puias/2020/0
514-MladenDimitrov\n\nWe will investigate the geometry of the p-adic eigen
curve at classical points where the Galois representation is locally trivi
al at p\, and will give applications to Iwasawa and Hida theories.
DTSTART:20200514T183000Z
DTEND:20200514T193000Z
LAST-MODIFIED:20200515T011934Z
LOCATION:https://theias.zoom.us/j/959183254
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/node/110596
END:VEVENT
BEGIN:VEVENT
UID:be801ca2-4550-495b-8cad-6e8a398226b7
DTSTAMP:20200812T123701Z
CREATED:20191025T211502Z
DESCRIPTION:Topic: MathZero\, The Classification Problem\, and Set-Theoreti
c Type Theory\n\nSpeaker: David McAllester\, Toyota Technological Institut
e at Chicago \n\nVideo: https://video.ias.edu/machinelearning/2020/0514-Da
vidMcAllester\n\nAlphaZero learns to play go\, chess and shogi at a superh
uman level through self play given only the rules of the game. This raises
the question of whether a similar thing could be done for mathematics ---
a MathZero. MathZero would require a formal foundation and an objective.
We propose the foundation of set-theoretic dependent type theory and an ob
jective defined in terms of the classification problem --- the problem of
classifying concept instances up to isomorphism. Isomorphism is central to
the structure of mathematics. Mathematics is organized around concepts su
ch as graphs\, groups\, topological spaces and manifolds each of which is
associated with a notion of isomorphism. Each concept is associated with a
classification problem --- the problem of enumerating the instances of a
given concept up to isomorphism. The natural numbers arise as the solution
to the classification problem for finite sets. In this talk we attempt to
set the stage for MathZero by giving what we believe to be the first isom
orphism inference rules for set-theoretic dependent type theory with propo
sitional set-theoretic equality. The presentation is intended to be access
ible to mathematicians with no prior exposure to type theory.
DTSTART:20200514T190000Z
DTEND:20200514T203000Z
LAST-MODIFIED:20200515T012016Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/106041
END:VEVENT
BEGIN:VEVENT
UID:28eb51d7-ff90-4d1f-b17c-173fa7efad51
DTSTAMP:20200812T123701Z
CREATED:20200420T142606Z
DESCRIPTION:Topic: Reflections on Cylindrical Contact Homology\n\nSpeaker:
Jo Nelson\, Rice University\n\nVideo: https://video.ias.edu/puias/2020/051
5-JoNelson\n\nThis talk beings with a light introduction\, including some
historical anecdotes to motivate the development of this Floer theoretic m
achinery for contact manifolds some 25 years ago. I will discuss joint wor
k with Hutchings which constructs nonequivariant and a family Floer equiva
riant version of contact homology. Both theories are generated by two copi
es of each Reeb orbit over Z and capture interesting torsion information.
I will explain the need for an obstruction bundle gluing correction term i
n the expression of the differential in the presence of contractible Reeb
orbits\, which is essential even in the simple example of an ellipsoid. I
will then explain how one can recover the original cylindrical theory prop
osed by Eliashberg-Givental-Hofer via our constructions.
DTSTART:20200515T130000Z
DTEND:20200515T143000Z
LAST-MODIFIED:20200518T001716Z
LOCATION:https://princeton.zoom.us/j/745635914
SUMMARY:IAS/PU-Montreal-Tel-Aviv Symplectic Geometry Seminar
URL:https://www.ias.edu/node/110621
END:VEVENT
BEGIN:VEVENT
UID:4269f0ba-f4fa-47f0-968d-6fcd7f44f146
DTSTAMP:20200812T123701Z
CREATED:20200508T134428Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200515T190000Z
DTEND:20200515T200000Z
LAST-MODIFIED:20200508T134428Z
LOCATION:Remote Event
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/node/110911
END:VEVENT
BEGIN:VEVENT
UID:85efb982-2c2a-44ae-8820-939cada6ff91
DTSTAMP:20200812T123701Z
CREATED:20200506T112735Z
DESCRIPTION:Topic: Square function estimate for the cone in R^3\n\nSpeaker:
Hong Wang\, Member\, School of Mathematics\n\nVideo: https://video.ias.ed
u/analysis/2020/05/18-HongWang\n\nWe prove a sharp square function estimat
e for the cone in R^3 and consequently the local smoothing conjecture for
the wave equation in 2+1 dimensions. The proof uses induction on scales an
d an incidence estimate for points and tubes.\n\nThis is joint work with L
arry Guth and Ruixiang Zhang.
DTSTART:20200518T150000Z
DTEND:20200518T160000Z
LAST-MODIFIED:20200518T180249Z
LOCATION:Remote Access via Zoom videoconferencing (link below)
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/node/110886
END:VEVENT
BEGIN:VEVENT
UID:dba17c3d-9a53-412c-bbc5-f5c6a25a5ef4
DTSTAMP:20200812T123701Z
CREATED:20200423T185014Z
DESCRIPTION:Topic: The Non-Stochastic Control Problem\n\nSpeaker: Elad Haza
n\, Princeton University\n\nVideo: https://video.ias.edu/csdm/2020/0518-El
adHazan\n\nLinear dynamical systems are a continuous subclass of reinforce
ment learning models that are widely used in robotics\, finance\, engineer
ing\, and meteorology. Classical control\, since the work of Kalman\, has
focused on dynamics with Gaussian i.i.d. noise\, quadratic loss functions
and\, in terms of provably efficient algorithms\, known systems and observ
ed state. We'll discuss how to apply new machine learning methods which re
lax all of the above: efficient control with adversarial noise\, general l
oss functions\, unknown systems\, and partial observation.\n\nBased on a s
eries of works with Naman Agarwal\, Nataly Brukhim\, Karan Singh\, Sham Ka
kade\, Max Simchowitz\, Cyril Zhang\, Paula Gradu\, John Hallman
DTSTART:20200518T150000Z
DTEND:20200518T160000Z
LAST-MODIFIED:20200518T180314Z
LOCATION:https://theias.zoom.us/j/360043913
SUMMARY:Computer Science/Discrete Mathematics Seminar I
URL:https://www.ias.edu/node/110751
END:VEVENT
BEGIN:VEVENT
UID:74e941ea-f232-4cea-8db4-d9edae546d9b
DTSTAMP:20200812T123701Z
CREATED:20200508T135712Z
DESCRIPTION:Topic: Binary Stars & Exoplanets @ Birmingham\n\nSpeaker: Amaur
y Triaud\, University of Birmingham\n\nI will start by describing our depa
rtment at Birmingham and the type of research we do\, before detailing som
e of the exoplanet research activities of my group. We will focus on two p
articular topics: low-mass eclipsing binaries in order to build reliable m
ass/radius relationships\, including a double-line eclipsing binary brown
dwarf\, the only second ever identified. Following this\, I will show prel
iminary results from our ongoing radial-velocity search for circumbinary p
lanets including multiple exoplanet candidates.
DTSTART:20200518T161500Z
DTEND:20200518T171500Z
LAST-MODIFIED:20200508T135712Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/110916
END:VEVENT
BEGIN:VEVENT
UID:d7b14ae2-471c-419a-b8f5-3b5f81ab4d2c
DTSTAMP:20200812T123701Z
CREATED:20200514T151519Z
DESCRIPTION:Topic: Predicting Electron Gas into Dark Matter-only Simulation
s\n\nSpeaker: Leander Thiele\, Princeton University\n\nForward simulating
the behaviour of baryonic components under gravity as well as astrophysica
l effects is a challenging problem. However\, there is a clear need for ac
curate theoretical predictions of observables sourced by baryonic physics\
, for example the tSZ and kSZ effects. As an alternative to time-intensive
hydrodynamic simulations\, we demonstrate a viable technique to predict s
everal properties of the electron gas into dark matter-only simulations us
ing convolutional neural networks. We provide some new ideas to overcome c
hallenges arising from the sparsity of the data.
DTSTART:20200518T163000Z
DTEND:20200518T180000Z
LAST-MODIFIED:20200514T151519Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion - Speaker 2
URL:https://www.ias.edu/node/110966
END:VEVENT
BEGIN:VEVENT
UID:76e9ff7d-1069-4269-a5ff-8834a77a30ff
DTSTAMP:20200812T123701Z
CREATED:20190802T151502Z
DESCRIPTION:Topic: Probing the Tensor Consistency Relation with the CMB Bis
pectrum\n\nSpeaker: Adriaan Duivenvoorden\, Princeton University\n\nIn thi
s talk I will introduce the CMB bispectrum\, discuss recent constraints an
d upcoming observations and\, in particular\, focus on how the bispectrum
can be used to investigate the tensor consistency relation: a relatively u
nexplored type of primordial non-Gaussianity. After a general exposition o
f bispectrum estimation\, I will move on to the tensor consistency relatio
n. I will argue why upcoming CMB data is particularly well-suited to test
the relation: low resolution B-mode data are complementary to high-resolut
ion E-mode and temperature data. Lastly\, I will explain how existing esti
mation techniques have to be adapted for this new type of non-Gaussianity
and discuss progress towards an actual constraint.
DTSTART:20200518T163000Z
DTEND:20200518T180000Z
LAST-MODIFIED:20200514T151917Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion - Speaker 1
URL:https://www.ias.edu/node/102651
END:VEVENT
BEGIN:VEVENT
UID:f2e57c22-da92-4163-94d0-555ff7159c4f
DTSTAMP:20200812T123701Z
CREATED:20200515T121054Z
DESCRIPTION:Topic: Neural SDEs: Deep Generative Models in the Diffusion Lim
it\n\nSpeaker: Maxim Raginsky\, University of Illinois Urbana-Champaign\n
\nVideo: https://video.ias.edu/tml/2020/0519-MaximRaginsky\n\nIn deep gene
rative models\, the latent variable is generated by a time-inhomogeneous M
arkov chain\, where at each time step we pass the current state through a
parametric nonlinear map\, such as a feedforward neural net\, and add a sm
all independent Gaussian perturbation. In this talk\, based on joint work
with Belinda Tzen\, I will discuss the diffusion limit of such models\, wh
ere we increase the number of layers while sending the step size and the n
oise variance to zero. I will first provide a unified viewpoint on both sa
mpling and variational inference in such generative models through the len
s of stochastic control. Then I will show how we can quantify the expressi
veness of diffusion-based generative models. Specifically\, I will prove t
hat one can efficiently sample from a wide class of terminal target distri
butions by choosing the drift of the latent diffusion from the class of mu
ltilayer feedforward neural nets\, with the accuracy of sampling measured
by the Kullback-Leibler divergence to the target distribution. Finally\, I
will briefly discuss a scheme for unbiased\, finite-variance simulation i
n such models. This scheme can be implemented as a deep generative model w
ith a random number of layers.
DTSTART:20200519T160000Z
DTEND:20200519T173000Z
LAST-MODIFIED:20200519T183213Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/110971
END:VEVENT
BEGIN:VEVENT
UID:19659b8e-0a89-4ddb-8ca1-75e10b28b111
DTSTAMP:20200812T123701Z
CREATED:20200511T183237Z
DESCRIPTION:Topic: Conley's fundamental theorem of dynamical systems\n\nSpe
aker: Amie Wilkinson\, University of Chicago\n\nIn 1978\, Charles Conley c
lassified all continuous dynamical systems. His theorem\, dubbed the 'fund
amental theorem of dynamical systems' states that the orbits of any contin
uous map on a compact metric space fall into two classes: gradient-like an
d recurrent. When the recurrent part is factored out\, the dynamics appear
to be gradient-like. While one might wonder how a theorem that applies to
every continuous map could be of any use\, it plays a foundational role i
n many deep results.
DTSTART:20200520T213000Z
DTEND:20200520T230000Z
LAST-MODIFIED:20200518T134724Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/110951
END:VEVENT
BEGIN:VEVENT
UID:ccea8d3e-44c6-442f-a2a8-b97889e2882c
DTSTAMP:20200812T123701Z
CREATED:20200507T143913Z
DESCRIPTION:Topic: Iwasawa theory and Bloch-Kato conjecture for unitary gro
ups\n\nSpeaker: Xin Wan\, Morningside Center of Mathematics\, Chinese Acad
emy of Sciences\n\nVideo: https://video.ias.edu/jointnumbertheory/2020/052
1-XinWan\n\nWe describe a new method to study Eisenstein family and Iwasaw
a theory on unitary groups over totally real fields of general signatures.
As a consequence we prove that if the central L-value of a cuspidal eigen
form on the unitary group twisted by a CM character is 0\, then the corres
ponding Selmer group has positive rank. The method also has a byproduct th
e p-adic functional equations for p-adic L-functions and p-adic families o
f Eisenstein series on unitary groups.
DTSTART:20200521T130000Z
DTEND:20200521T140000Z
LAST-MODIFIED:20200521T162146Z
LOCATION:https://theias.zoom.us/j/959183254
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/node/110896
END:VEVENT
BEGIN:VEVENT
UID:bb71f4a3-7722-44b1-9a60-45a750deace4
DTSTAMP:20200812T123701Z
CREATED:20200506T110159Z
DESCRIPTION:Topic: Forecasting Epidemics and Pandemics\n\nSpeaker: Roni Ros
enfeld\, Carnegie Mellon University\n\nVideo: https://video.ias.edu/tml/20
20/0521-RoniRosenfeld\n\nEpidemiological forecasting is critically needed
for decision making by national and local governments\, public health offi
cials\, healthcare institutions and the general public. The Delphi group a
t Carnegie Mellon University was founded in 2012 to advance the theory and
technological capability of epidemiological forecasting\, and to promote
its role in decision making\, both public and private. Our long term visio
n is to make epidemiological forecasting as useful and universally accepte
d as weather forecasting is today. I will describe some of the methods we
developed over the past eight year for forecasting flu\, dengue and other
epidemics\, and the challenges we faced in adapting these method to the CO
VID pandemic in the past few months.
DTSTART:20200521T190000Z
DTEND:20200521T200000Z
LAST-MODIFIED:20200521T221956Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/110871
END:VEVENT
BEGIN:VEVENT
UID:4dc38bac-47a0-4258-be9f-f1f780f48619
DTSTAMP:20200812T123701Z
CREATED:20200420T142731Z
DESCRIPTION:Topic: Mirrors of curves and their Fukaya categories\n\nSpeaker
: Denis Auroux\, Harvard University\n\nHomological mirror symmetry predict
s that the derived category of coherent sheaves on a curve has a symplecti
c counterpart as the Fukaya category of a mirror space. However\, with the
exception of elliptic curves\, this mirror is usually a symplectic Landau
-Ginzburg model\, i.e. a non-compact manifold equipped with the extra data
of a 'stop' in its boundary at infinity. Most of the talk will focus on a
family of Landau-Ginzburg models which provide mirrors to curves in (C*)^
2 or in toric surfaces (or more generally to hypersurfaces in toric variet
ies)\, and their fiberwise wrapped Fukaya categories (joint work with Moha
mmed Abouzaid). I will then discuss more a speculative way of constructing
mirrors of curves without Landau-Ginzburg models\, involving a new flavor
of Lagrangian Floer theory in trivalent configurations of Riemann surface
s (joint work with Alexander Efimov and Ludmil Katzarkov).
DTSTART:20200522T130000Z
DTEND:20200522T143000Z
LAST-MODIFIED:20200526T182702Z
LOCATION:https://princeton.zoom.us/j/745635914
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/node/110626
END:VEVENT
BEGIN:VEVENT
UID:60ed7faf-8498-41e3-b244-3136914c71ea
DTSTAMP:20200812T123701Z
CREATED:20200515T212108Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200522T190000Z
DTEND:20200522T200000Z
LAST-MODIFIED:20200515T212108Z
LOCATION:Remote Event
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/node/110996
END:VEVENT
BEGIN:VEVENT
UID:88fa2dd4-a069-4992-b06a-2862fcd89064
DTSTAMP:20200812T123701Z
CREATED:20200513T150837Z
DESCRIPTION:Topic: An application of integers of the 12th cyclotomic field
in the theory of phase transitions\n\nSpeaker: Alik Mazel\, AMC Health\n\n
The construction of pure phases from ground states is performed for $ u >
u_*(d)$ for all values of $d$ except for 39 special ones. For values $d$ w
ith a single equivalence class all periodic ground states generate the cor
responding pure phase which provides a complete description of extreme Gib
bs measures (complete phase diagram). For a general $d$ we prove that at l
east one class of ground states generates pure phases and propose an algor
ithm that decides\, after finitely many iterations\, which classes of grou
nd states generate pure phases. We cojecture that in case of several class
es only one of them generates pure phases which is confirmed by (numerical
) application of our algorithm to several (relatively small) values of $d$
.
DTSTART:20200525T150000Z
DTEND:20200525T160000Z
LAST-MODIFIED:20200518T133844Z
LOCATION:Remote Access via Zoom videoconferencing (link below)
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/node/110961
END:VEVENT
BEGIN:VEVENT
UID:d93f154e-f75d-4f97-abbf-c0f88b9e6156
DTSTAMP:20200812T123701Z
CREATED:20200518T135028Z
DESCRIPTION:Topic: Emerging symmetries in statistical physics systems\n\nSp
eaker: Hugo Duminil-Copin\, Université de Genève/IHES\n\nA great achieveme
nt of physics in the second half of the twentieth century has been the pre
diction of conformal symmetry of the scaling limit of critical statistical
physics systems. Around the turn of the millenium\, the mathematical unde
rstanding of this fact has progressed tremendously in two dimensions with
the introduction of the Schramm-Loewner Evolution and the proofs of confor
mal invariance of the Ising model and dimers. Nevertheless\, the understan
ding is still restricted to very specific models. In this talk\, we will g
ently introduce the notion of conformal invariance of lattice systems by t
aking the example of percolation models. We will also explain some recent
and partial progress in the direction of proving conformal invariance for
a large class of such models.
DTSTART:20200527T213000Z
DTEND:20200527T230000Z
LAST-MODIFIED:20200526T121254Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111001
END:VEVENT
BEGIN:VEVENT
UID:a6558858-7686-46b9-96b7-b822563e88af
DTSTAMP:20200812T123701Z
CREATED:20200507T144300Z
DESCRIPTION:Topic: Joint equidistribution of adelic torus orbits and famili
es of twisted L-functions\n\nSpeaker: Farrell Brumley\, Université Sorbonn
e Paris Nord\n\nVideo: https://video.ias.edu/puias/2020/0518-FarrellBrumle
y\n\nThe classical Linnik problems are concerned with the equidistribution
of adelic torus orbits on the homogeneous spaces attached to inner forms
of GL2\, as the discriminant of the torus gets large. When specialized\, t
hese problems admit beautiful classical interpretations\, such as the equi
distribution of integer points on spheres\, of Heegner points or packets o
f closed geodesics on the modular surface\, or of supersingular reductions
of CM elliptic curves. In the mid 20th century\, Linnik and his school es
tablished the equidistribution of many of these classical variants through
his ergodic method\, under a congruence condition on the discriminants mo
dulo a fixed auxiliary prime. More recently\, the Waldspurger formula and
subconvex estimates on L-functions were used to remove these congruence co
nditions\, and provide effective power-savings rates.\n\nIn their 2006 ICM
address\, Michel and Venkatesh proposed a variant of this problem in whic
h one considers the product of two distinct inner forms of GL2\, along wit
h a diagonally embedded torus. One can again specialize the setting to obt
ain interesting classical reformulations\, such as the joint equidistribut
ion of integer points on the sphere\, together with the shape of the ortho
gonal lattice. This hybrid context has received a great deal of attention
recently in the dynamics community\, where\, for instance\, the latter pro
blem was solved by Aka\, Einsiedler\, and Shapira\, under supplementary co
ngruence conditions modulo two fixed primes\, using as critical input the
joinings theorem of Einsiedler and Lindenstrauss.\n\nIn joint (ongoing) wo
rk with Valentin Blomer\, we remove the supplementary congruence condition
s in the joint equidistribution problem\, conditionally on the Riemann Hyp
othesis\, while obtaining a logarithmic rate of convergence. The proof use
s Waldsurger’s theorem and estimates of fractional moments of L-functions
in the family of class group twists.
DTSTART:20200528T140000Z
DTEND:20200528T150000Z
LAST-MODIFIED:20200528T183157Z
LOCATION:https://theias.zoom.us/j/959183254
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/node/110901
END:VEVENT
BEGIN:VEVENT
UID:48198fb2-da85-4061-8669-ae44ed5415bc
DTSTAMP:20200812T123701Z
CREATED:20200420T142839Z
DESCRIPTION:Topic: Duality for Rabinowitz-Floer homology\n\nSpeaker: Alex O
ancea\, Institut de Mathématiques de Jussieu-Paris Rive Gauche\n\nI will e
xplain a duality theorem with products in Rabinowitz-Floer homology. This
has a bearing on string topology and explains a number of dualities that h
ave been observed in that setting. Joint work in progress with Kai Cielieb
ak and Nancy Hingston.
DTSTART:20200529T130000Z
DTEND:20200529T143000Z
LAST-MODIFIED:20200526T121546Z
LOCATION:https://princeton.zoom.us/j/745635914
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/node/110631
END:VEVENT
BEGIN:VEVENT
UID:30d3919c-48df-42fc-a7b0-ae59734c39a0
DTSTAMP:20200812T123701Z
CREATED:20200420T132103Z
DESCRIPTION:Topic: Winding for Wave Maps\n\nSpeaker: Max Engelstein\, Unive
rsity of Minnesota\n\nVideo: https://video.ias.edu/analysis/2020/0601-MaxE
ngelstein\n\nWave maps are harmonic maps from a Lorentzian domain to a Rie
mannian target. Like solutions to many energy critical PDE\, wave maps can
develop singularities where the energy concentrates on arbitrary small sc
ales but the norm stays bounded. Zooming in on these singularities yields
a harmonic map (called a soliton or bubble) in the weak limit. One fundame
ntal question is whether this weak limit is unique\, that is to say\, whet
her different bubbles may appear as the limit of different sequences of re
scalings. We show by example that uniqueness may not hold if the target ma
nifold is not analytic. Our construction is heavily inspired by Peter Topp
ing's analogous example of a ``winding' bubble in harmonic map heat flow.
However\, the Hamiltonian nature of the wave maps will occasionally necess
itate different arguments.\n\nThis is joint work with Dana Mendelson (U Ch
icago).
DTSTART:20200601T150000Z
DTEND:20200601T160000Z
LAST-MODIFIED:20200602T150012Z
LOCATION:Remote Access via Zoom videoconferencing (link below)
SUMMARY:Analysis Seminar
URL:https://www.ias.edu/node/110606
END:VEVENT
BEGIN:VEVENT
UID:91953e2b-aec3-44ba-a99a-12b76e681b95
DTSTAMP:20200812T123701Z
CREATED:20200529T183732Z
DESCRIPTION:Topic: The Kinematics of Globular Cluster Populations in the E-
Mosaics Simulations and Their Implications for the Assembly History of the
Milky Way\n\nSpeaker: Discussion Leader Sebastian Trujillo-Gomez\, Univer
sität Heidelberg\n\n
DTSTART:20200601T150000Z
DTEND:20200601T160000Z
LAST-MODIFIED:20200529T184457Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111111
END:VEVENT
BEGIN:VEVENT
UID:9398a369-aeb2-452d-a827-b6eb8133b367
DTSTAMP:20200812T123701Z
CREATED:20200529T182022Z
DESCRIPTION:Topic: Formation of Giant Planet Satellites\n\nSpeaker: Konstan
tin Batygin\, California Institute of Technology\n\nRecent analyses have s
hown that the concluding stages of giant planet formation are accompanied
by the development of large-scale meridional flow of gas inside the planet
ary Hill sphere. This circulation feeds a circumplanetary disk that viscou
sly expels gaseous material back into the parent nebula\, maintaining the
system in a quasi-steady state. Here we investigate the formation of natur
al satellites of Jupiter and Saturn within the framework of this newly out
lined picture. We begin by considering the long-term evolution of solid ma
terial\, and demonstrate that the circumplanetary disk can act as a global
dust trap\, where s ~ 0.1-10 mm grains achieve a hydrodynamical equilibri
um\, facilitated by a balance between radial updraft and aerodynamic drag.
This process leads to a gradual increase in the system's metallicity\, an
d eventually culminates in the gravitational fragmentation of the outer re
gions of the solid sub-disk into R ~ 100 km satellitesimals. Subsequently\
, satellite conglomeration ensues via pairwise collisions\, but is termina
ted when disk-driven orbital migration removes the growing objects from th
e satellitesimal feeding zone. The resulting satellite formation cycle can
repeat multiple times\, until it is brought to an end by photo-evaporatio
n of the parent nebula. Numerical simulations of the envisioned formation
scenario yield satisfactory agreement between our model and the known prop
erties of the Jovian and Saturnian moons.
DTSTART:20200601T161500Z
DTEND:20200601T171500Z
LAST-MODIFIED:20200529T182022Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111106
END:VEVENT
BEGIN:VEVENT
UID:e6c270c9-3f62-4380-bf85-56a376e8e4f2
DTSTAMP:20200812T123701Z
CREATED:20200529T145923Z
DESCRIPTION:Topic: FlowPM: Distributed TensorFlow Implementation of the Cos
mological N-body Solver\n\nSpeaker: Chirag Modi\, University of California
\, Berkeley\n\n
DTSTART:20200601T163000Z
DTEND:20200601T180000Z
LAST-MODIFIED:20200529T190436Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/node/111091
END:VEVENT
BEGIN:VEVENT
UID:abd2c173-7196-4c0d-9a15-0305c1791a84
DTSTAMP:20200812T123701Z
CREATED:20190925T151501Z
DESCRIPTION:
DTSTART:20200602T120000Z
DTEND:20200605T210000Z
LAST-MODIFIED:20200322T195954Z
LOCATION:White-Levy
SUMMARY:CANCELED: NES Conference
URL:https://www.ias.edu/node/105006
END:VEVENT
BEGIN:VEVENT
UID:0e71bccf-280c-42b6-877e-41eaef600d62
DTSTAMP:20200812T123701Z
CREATED:20200522T165815Z
DESCRIPTION:Topic: Mathematics formalization for mathematicians\n\nSpeaker:
Patrick Massot\, Université Paris-Sud\n\nA growing number of mathematicia
ns are having fun explaining mathematics to computers using proof assistan
t softwares. This process is called formalization. For instance\, together
with Kevin Buzzard and Johan Commelin\, I recently formalized enough topo
logy and algebra to define Scholze's perfectoid spaces to a computer. In t
his talk I'll describe what formalization looks like\, what kind of things
it teaches us\, and how it could even turn out to be useful (in our usual
sense of 'useful'). This will not be a talk about foundations of mathemat
ics\, and I will stick to elementary examples.
DTSTART:20200603T213000Z
DTEND:20200603T230000Z
LAST-MODIFIED:20200601T125349Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111041
END:VEVENT
BEGIN:VEVENT
UID:dd7e78d5-ed9c-412a-b5c3-5c0128f89402
DTSTAMP:20200812T123701Z
CREATED:20200508T180330Z
DESCRIPTION:Topic: Dynamical generalizations of the Prime Number Theorem an
d disjointness of additive and multiplicative actions\n\nSpeaker: Florian
Richter\, Northwestern University\n\nOne of the fundamental challenges in
number theory is to understand the intricate way in which the additive and
multiplicative structures in the integers intertwine. We will explore a d
ynamical approach to this topic. After introducing a new dynamical framewo
rk for treating questions in multiplicative number theory\, we will presen
t an ergodic theorem which contains various classical number-theoretic res
ults\, such as the Prime Number Theorem\, as special cases. This naturally
leads to a formulation of an extended form of Sarnak's conjecture\, which
deals with the disjointness of actions of (N\,+) and (N\,*).\n\nThis talk
is based on joint work with Vitaly Bergelson.
DTSTART:20200604T190000Z
DTEND:20200604T200000Z
LAST-MODIFIED:20200519T123508Z
LOCATION:https://theias.zoom.us/j/959183254
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/node/110931
END:VEVENT
BEGIN:VEVENT
UID:4e7a3f71-47ae-4eec-82fa-de22f15b26a6
DTSTAMP:20200812T123701Z
CREATED:20200504T152739Z
DESCRIPTION:Topic: Three Short Research Talks\n\nSpeaker: Morgan Weiler\, J
oé Brendel\, Abror Pirnapasov\n\nMorgan Weiler\, Rice University: Infinite
staircases of symplectic embeddings of ellipsoids into Hirzebruch surface
s\n\nGromov nonsqueezing tells us that symplectic embeddings are governed
by more complex obstructions than volume. In particular\, in 2012\, McDuff
-Schlenk computed the embedding capacity function of the ball\, whose valu
e at a is the size of the smallest four-dimensional ball into which the el
lipsoid E(1\,a) symplectically embeds. They found that it contains an “inf
inite staircase” of piecewise-linear sections accumulating from below to t
he golden ratio to the fourth power. However\, infinite staircases seem to
be rare for more general targets. Work of Cristofaro-Gardiner-Holm-Mandin
i-Pires suggests that\, up to scaling\, there are only finitely many ratio
nal symplectic toric manifolds whose embedding capacity functions contain
infinite staircases\, while Usher has found infinitely many irrational pol
ydisks with infinite staircases. Using ECH capacities in conjunction with
the methods of McDuff-Schlenk\, we will explain how we have found several
infinite families of Hirzebruch surfaces whose embedding capacity function
s we expect to contain an infinite staircase. Many of these staircases are
“descending” rather than “ascending.' This is joint work with Maria Berto
zzi\, Tara Holm\, Emily Maw\, Dusa McDuff\, Grace Mwakyoma\, and Ana Rita
Pires.\n\nJoé Brendel\, University of Neuchâtel: Real Lagrangian Tori in t
oric symplectic manifolds\n\nIn this talk we will be addressing the questi
on whether a given Lagrangian torus in a toric monotone symplectic manifol
d can be realized as the fixed point set of an anti-symplectic involution
(in which case it is called 'real'). In the case of toric fibres\, the ans
wer depends on the geometry of the moment polytope of the ambient manifold
. In the case of the Chekanov torus\, the answer is always no. This can be
proved using displacement energy and versal deformations.\n\nAbror Pirnap
asov\, Ruhr-Universität Bochum: Reeb orbits that force topological entropy
\n\nA transverse link in a contact 3-manifold forces topological entropy i
f every Reeb flow possessing this link as a set of periodic orbits has pos
itive topological entropy. We will explain how cylindrical contact homolog
y on the complement of transverse links can be used to show that certain t
ransverse links force topological entropy. As an application\, we show tha
t on every closed contact 3-manifold exists transverse knots that force to
pological entropy. We also generalize to the category of Reeb flows a beau
tiful result due to Denvir and Mackay\, which says that if a Riemannian me
tric on the two-dimensional torus has a contractible closed geodesic then
its geodesic flow has positive topological entropy. All this is joint work
s with Marcelo R.R. Alves\, Umberto L. Hryniewicz and Pedro A.S. Salomão
DTSTART:20200605T130000Z
DTEND:20200605T143000Z
LAST-MODIFIED:20200622T154723Z
LOCATION:https://princeton.zoom.us/j/745635914
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/node/110831
END:VEVENT
BEGIN:VEVENT
UID:89204ceb-1329-4bac-aa9a-f07ab1c6fb3f
DTSTAMP:20200812T123701Z
CREATED:20200529T145447Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200605T190000Z
DTEND:20200605T200000Z
LAST-MODIFIED:20200529T145447Z
LOCATION:Remote Event
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/node/111086
END:VEVENT
BEGIN:VEVENT
UID:91821e33-4c64-4e0a-8787-97c3e8b36459
DTSTAMP:20200812T123701Z
CREATED:20200605T140659Z
DESCRIPTION:Topic: The Formation of Isolated Ultra-Diffuse Galaxies in Romu
lus25\n\nSpeaker: Discussion Leader Anna Wright\, Rutgers University\n\n
DTSTART:20200608T150000Z
DTEND:20200608T160000Z
LAST-MODIFIED:20200605T191147Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111171
END:VEVENT
BEGIN:VEVENT
UID:f4233b09-6e67-4352-b235-f63f52b85fdf
DTSTAMP:20200812T123701Z
CREATED:20200605T140010Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200608T161500Z
DTEND:20200608T171500Z
LAST-MODIFIED:20200605T191315Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111166
END:VEVENT
BEGIN:VEVENT
UID:ae90fc94-909d-4c5f-aac2-20c9115ff564
DTSTAMP:20200812T123701Z
CREATED:20200605T133639Z
DESCRIPTION:
DTSTART:20200608T163000Z
DTEND:20200608T180000Z
LAST-MODIFIED:20200605T191423Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/node/111161
END:VEVENT
BEGIN:VEVENT
UID:38244ea4-487a-480c-9bad-7544dac7c1ee
DTSTAMP:20200812T123701Z
CREATED:20200601T110927Z
DESCRIPTION:Topic: What Do Our Models Learn?\n\nSpeaker: Aleksander Mądry\,
Massachusetts Institute of Technology\n\nVideo: https://video.ias.edu/tml
/2020/0609-AleksanderMadry\n\nLarge-scale vision benchmarks have driven---
and often even defined---progress in machine learning. However\, these ben
chmarks are merely proxies for the real-world tasks we actually care about
. How well do our benchmarks capture such tasks?\n\nIn this talk\, I will
discuss the alignment between our benchmark-driven ML paradigm and the rea
l-world uses cases that motivate it. First\, we will explore examples of b
iases in the ImageNet dataset\, and how state-of-the-art models exploit th
em. We will then demonstrate how these biases arise as a result of design
choices in the data collection and curation processes.\n\nBased on joint w
orks with Logan Engstrom\, Andrew Ilyas\, Shibani Santurkar\, Jacob Steinh
ardt\, Dimitris Tsipras and Kai Xiao.
DTSTART:20200609T163000Z
DTEND:20200609T174500Z
LAST-MODIFIED:20200610T164105Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111116
END:VEVENT
BEGIN:VEVENT
UID:0a647cb7-033e-46ec-aa9d-f1b486b3fa3a
DTSTAMP:20200812T123701Z
CREATED:20200506T113428Z
DESCRIPTION:Topic: On Langevin Dynamics in Machine Learning\n\nSpeaker: Mic
hael I. Jordan\, University of California\, Berkeley\n\nVideo: https://vid
eo.ias.edu/machinelearning/2020/0611-MichaelI.Jordan\n\nLangevin diffusion
s are continuous-time stochastic processes that are based on the gradient
of a potential function. As such they have many connections---some known a
nd many still to be explored---to gradient-based machine learning. I'll di
scuss several recent results in this vein: (1) the use of Langevin-based a
lgorithms in bandit problems\; (2) the acceleration of Langevin diffusions
\; (3) how to use Langevin Monte Carlo without making smoothness assumptio
ns. I'll present these results in the context of a general argument about
the virtues of continuous-time perspectives in the analyis of discrete-tim
e optimization and Monte Carlo algorithms.
DTSTART:20200611T190000Z
DTEND:20200611T203000Z
LAST-MODIFIED:20200612T162713Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/110891
END:VEVENT
BEGIN:VEVENT
UID:cc01614b-7752-4d06-a8c9-19fd51ea39e8
DTSTAMP:20200812T123701Z
CREATED:20200604T175725Z
DESCRIPTION:Topic: New constraints on the Galois configurations of algebrai
c integers in the complex plane \n\nSpeaker: Vesselin Dimitrov\, Universit
y of Toronto\n\nVideo: https://video.ias.edu/puias/2020/0611-VesselinDimit
rov\n\nFekete (1923) discovered the notion of transfinite diameter while s
tudying the possible configurations of Galois orbits of algebraic integers
in the complex plane. Based purely on the fact that the discriminants of
monic integer irreducible polynomials $P(X) \in \mathbb{Z}[X]$ are at leas
t $1$ in magnitude (since they are non-zero integers)\, he found that the
incidences $(\mathcal{K}\, P)$ between these polynomials $P(X)$ and compac
ts $\mathcal{K} \subset \mathbb{C}$ of transfinite diameter $d(\mathcal{K}
)\n\nBreusch (1951) solved the non-reciprocal case of the Lehmer problem b
y taking up a lossless arithmetic input from resultants rather than discri
minants. In this talk\, I will present some further lossless constraints t
hat derive from certain whole infinite sequences of Hankel determinants at
tached to the polynomial $P(X)$ by algebraic operations. This will allow u
s to update on Fekete's theorem on the incidences $(\mathcal{K}\,P)$\, by
focusing this time on the fibers over the argument $P$ for compacts $\math
cal{K}$ that are made of finite unions of Jordan arcs continua covering th
e roots of $P$ with certain congruence conditions on $P$ and on the connec
ted components of $\mathcal{K}$. The ensuing taming on Galois orbits turn
out to be sufficiently severe to resolve the conjecture of Schinzel and Za
ssenhaus (I will explain this case in detail)\, amidst certain other cases
of the Lehmer problem that are far off from Salem's extreme. In a geometr
ic formulation for $\mathcal{A}_g$ with its Kobayashi metric\, the root sp
acing constraints are likewise sufficiently severe to furthermore yield th
e exact $\mathcal{A}_g$ analogs of the well-known polynomial counting theo
rems of Penner and Leininger-Margalit on the '$L$-short' geodesics of modu
li space $\mathcal{M}_g$.
DTSTART:20200611T190000Z
DTEND:20200611T200000Z
LAST-MODIFIED:20200612T162646Z
LOCATION:https://theias.zoom.us/j/959183254
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/node/111151
END:VEVENT
BEGIN:VEVENT
UID:aebd708d-80c5-462a-aebb-0960944b56c9
DTSTAMP:20200812T123701Z
CREATED:20190604T151501Z
DESCRIPTION:
DTSTART:20200612T120000Z
DTEND:20200613T210000Z
LAST-MODIFIED:20200211T211220Z
LOCATION:White-Levy
SUMMARY:NES Colophons Workshop
URL:https://www.ias.edu/node/100506
END:VEVENT
BEGIN:VEVENT
UID:1838b718-a034-4fdd-b07d-6cee36a992a8
DTSTAMP:20200812T123701Z
CREATED:20200504T152913Z
DESCRIPTION:Topic: Floer Cohomology and Arc Spaces\n\nSpeaker: Mark McLean\
, Stony Brook University\n\nVideo: https://video.ias.edu/puias/2020/0612-M
arkMcLean\n\nLet f be a polynomial over the complex numbers with an isolat
ed singular point at the origin and let d be a positive integer. To such a
polynomial we can assign a variety called the dth contact locus of f. Mor
ally\, this corresponds to the space of d-jets of holomorphic disks in com
plex affine space whose boundary `wraps' around the singularity d times. W
e show that Floer cohomology of the dth power of the Milnor monodromy map
is isomorphic to compactly supported cohomology of the dth contact locus.
This answers a question of Paul Seidel and it also proves a conjecture of
Nero Budur\, Javier Fernández de Bobadilla\, Quy Thuong Lê and Hong Duc Ng
uyen. The key idea of the proof is to use a jet space version of the PSS m
ap together with a filtration argument.
DTSTART:20200612T131500Z
DTEND:20200612T143000Z
LAST-MODIFIED:20200612T162741Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/node/110836
END:VEVENT
BEGIN:VEVENT
UID:58de4042-c66e-4a20-9019-a485abe00245
DTSTAMP:20200812T123701Z
CREATED:20200605T194851Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200612T190000Z
DTEND:20200612T200000Z
LAST-MODIFIED:20200605T194851Z
LOCATION:Remote Event
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/node/111186
END:VEVENT
BEGIN:VEVENT
UID:4935eb52-e0d0-483d-bdbf-d9942216ee06
DTSTAMP:20200812T123701Z
CREATED:20200611T172843Z
DESCRIPTION:Topic: The MOSDEF-LRIS Survey: The Interplay Between Massive St
ars and Ionized Gas in High-Redshift Star-Forming Galaxies\n\nSpeaker: Di
scussion Leader Alice Shapley\, University of California\, Los Angeles\n\n
DTSTART:20200615T150000Z
DTEND:20200615T160000Z
LAST-MODIFIED:20200612T182311Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111231
END:VEVENT
BEGIN:VEVENT
UID:c7df38bd-7ada-4893-b000-eae57cb0d5bb
DTSTAMP:20200812T123701Z
CREATED:20200612T132912Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200615T161500Z
DTEND:20200615T171500Z
LAST-MODIFIED:20200612T132912Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111236
END:VEVENT
BEGIN:VEVENT
UID:23dc5375-f53f-454d-ad5d-e91c5150a415
DTSTAMP:20200812T123701Z
CREATED:20200611T134252Z
DESCRIPTION:
DTSTART:20200615T163000Z
DTEND:20200615T180000Z
LAST-MODIFIED:20200611T134252Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/node/111216
END:VEVENT
BEGIN:VEVENT
UID:8150d038-56e8-479d-8d43-69c97c20d593
DTSTAMP:20200812T123701Z
CREATED:20200519T123912Z
DESCRIPTION:Topic: On learning in the presence of biased data and strategic
behavior\n\nSpeaker: Avrim Blum\, Toyota Technological Institute at Chica
go\n\nVideo: https://video.ias.edu/tml/2020/0616-AvrimBlum\n\nIn this talk
I will discuss two lines of work involving learning in the presence of bi
ased data and strategic behavior. In the first\, we ask whether fairness c
onstraints on learning algorithms can actually improve the accuracy of the
classifier produced\, when training data is unrepresentative or corrupted
due to bias. Typically\, fairness constraints are analyzed as a tradeoff
with classical objectives such as accuracy. Our results here show there ar
e natural scenarios where they can be a win-win\, helping to improve overa
ll accuracy. In the second line of work we consider strategic classificati
on: settings where the entities being measured and classified wish to be c
lassified as positive (e.g.\, college admissions) and will try to modify t
heir observable features if possible to make that happen. We consider this
in the online setting where a particular challenge is that updates made b
y the learning algorithm will change how the inputs behave as well.
DTSTART:20200616T190000Z
DTEND:20200616T203000Z
LAST-MODIFIED:20200622T154417Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111006
END:VEVENT
BEGIN:VEVENT
UID:42aa2357-d2f0-47cb-bc4f-a7b3c79e01e0
DTSTAMP:20200812T123701Z
CREATED:20200522T170057Z
DESCRIPTION:Topic: Infinite dimensional Hamiltonian systems: when hard prob
lems become harder\n\nSpeaker: Gigliola Staffilani\, Massachusetts Institu
te of Technology\n\nIn this talk I will first recall three classical theor
ems in the theory of finite dimensional Hamiltonian systems\, then I will
use the periodic nonlinear Schrodinger equation as an example of an infini
te dimensional Hamiltonian system and I will report on the extension of th
ose three theorems in this more difficult set up.
DTSTART:20200617T213000Z
DTEND:20200617T230000Z
LAST-MODIFIED:20200615T114136Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111051
END:VEVENT
BEGIN:VEVENT
UID:9e62aeeb-bcfa-4722-b5d8-3dea8082b767
DTSTAMP:20200812T123701Z
CREATED:20200521T145613Z
DESCRIPTION:Topic: The challenges of model-based reinforcement learning and
how to overcome them\n\nSpeaker: Csaba Szepesvári\, University of Alberta
\n\nVideo: https://video.ias.edu/tml/2020/0618-CsabaSzepesvari\n\nSome bel
ieve that truly effective and efficient reinforcement learning algorithms
must explicitly construct and explicitly reason with models that capture t
he causal structure of the world. In short\, model-based reinforcement lea
rning is not optional. As this is not a new belief\, it may be surprising
that empirically\, at least as far as the current state of art is concerne
d\, the majority of the top performing algorithms are model-free. In this
talk\, I will define three major challenges that need to be overcome for m
odel-based methods to take their place above\, or before the model-free on
es: (1) planning with large models\; (2) models are never well-specified\;
(3) models need to focus on task relevant aspects and ignore others. For
each of the challenges\, I will describe recent results that address them
and I will also take a tally of the most interesting (and challenging) rem
aining open problems.
DTSTART:20200618T190000Z
DTEND:20200618T203000Z
LAST-MODIFIED:20200619T165459Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111031
END:VEVENT
BEGIN:VEVENT
UID:f327c58a-fa5d-4d19-bf3c-3617e4e343c5
DTSTAMP:20200812T123701Z
CREATED:20200603T154520Z
DESCRIPTION:Topic: Independence of ℓ for Frobenius conjugacy classes attach
ed to abelian varieties\n\nSpeaker: Rong Zhou\, Imperial College London\n
\nVideo: https://video.ias.edu/jnt/2020/0618-RongZhou\n\nLet $A$ be an abe
lian variety over a number field $E\subset \mathbb{C}$ and let $v$ be a pl
ace of good reduction lying over a prime $p$. For a prime $\ell\neq p$\, a
result of Deligne implies that upon replacing $E$ by a finite extension\,
the Galois representation on the $\ell$-adic Tate module of $A$ factors a
s $\rho_\ell:\mathrm{Gal}(\overline{E}/E)\rightarrow G_A$\, where $G_A$ is
the Mumford--Tate group of $A_{\mathbb{C}}$. For $p>2$\, we prove that th
e conjugacy class of $\rho_\ell(\mathrm{Frob}_v)$ is defined over $\mathbb
{Q}$ and independent of $\ell$. This is joint work with Mark Kisin.
DTSTART:20200618T190000Z
DTEND:20200618T200000Z
LAST-MODIFIED:20200619T142259Z
LOCATION:https://theias.zoom.us/j/959183254
SUMMARY:Joint IAS/Princeton University Number Theory Seminar
URL:https://www.ias.edu/node/111136
END:VEVENT
BEGIN:VEVENT
UID:42642955-f202-4dfc-94e3-e154dd77de5e
DTSTAMP:20200812T123701Z
CREATED:20200504T153003Z
DESCRIPTION:Topic: Exotic symplectomorphisms and contact circle action\n\nS
peaker: Igor Uljarevic\, University of Belgrade\n\nAn exotic symplectomorp
hism is a symplectomorphism that is not isotopic to the identity through c
ompactly supported symplectomorphisms.Using Floer-theoretic methods\, we p
rove that the non-existence of an exotic symplectomorphism on the standard
symplectic ball\, $\mathbb{B}^{2n}\,$ implies a rather strict topological
condition on the free contact circle actions on the standard contact sphe
re\, $\mathbb{S}^{2n-1}.$ We also prove an analogue for a Liouville domain
and contact circle actions on its boundary. Applications include results
on the symplectic mapping class group\, the fundamental group of the group
of contactomorphisms\, and exotic contact structures on $\mathbb{S}^3.$ T
he talk is based on joint work with Dusan Drobnjak.
DTSTART:20200619T131500Z
DTEND:20200619T143000Z
LAST-MODIFIED:20200609T181104Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/node/110841
END:VEVENT
BEGIN:VEVENT
UID:0c2eb498-1ff5-4324-9b1e-327014e067fd
DTSTAMP:20200812T123701Z
CREATED:20200611T172617Z
DESCRIPTION:
DTSTART:20200619T190000Z
DTEND:20200619T200000Z
LAST-MODIFIED:20200619T125605Z
LOCATION:Remote Event
SUMMARY:Princeton University HSC Group Discussion - Canceled
URL:https://www.ias.edu/node/111226
END:VEVENT
BEGIN:VEVENT
UID:50df8780-265a-4168-94c1-fa166ce40f28
DTSTAMP:20200812T123701Z
CREATED:20200618T160439Z
DESCRIPTION:Topic: Virialization of the Inner CGM in the FIRE Simulations a
nd Implications for Galaxy Discs\, Star Formation and Feedback\n\nSpeaker:
Discussion Leader Jonathan Stern\, Northwestern University\n\n
DTSTART:20200622T150000Z
DTEND:20200622T160000Z
LAST-MODIFIED:20200619T153236Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111256
END:VEVENT
BEGIN:VEVENT
UID:4d5ee6e1-240c-448c-a761-f77765bcb6e9
DTSTAMP:20200812T123701Z
CREATED:20200618T171847Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200622T161500Z
DTEND:20200622T171500Z
LAST-MODIFIED:20200618T171847Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111261
END:VEVENT
BEGIN:VEVENT
UID:345eb1d3-06ae-459b-8c61-6933add38c3b
DTSTAMP:20200812T123701Z
CREATED:20200618T171932Z
DESCRIPTION:
DTSTART:20200622T163000Z
DTEND:20200622T180000Z
LAST-MODIFIED:20200618T171932Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/node/111266
END:VEVENT
BEGIN:VEVENT
UID:26c136d9-754d-4d43-a2a0-66dff1337f56
DTSTAMP:20200812T123701Z
CREATED:20200619T121836Z
DESCRIPTION:Topic: Generalizable Adversarial Robustness to Unforeseen Attac
ks\n\nSpeaker: Soheil Feizi\, University of Maryland\n\nIn the last couple
of years\, a lot of progress has been made to enhance robustness of model
s against adversarial attacks. However\, two major shortcomings still rema
in: (i) practical defenses are often vulnerable against strong “adaptive”
attack algorithms\, and (ii) current defenses have poor generalization to
“unforeseen” attack threat models (the ones not used in training).\n\nIn t
his talk\, I will present our recent results to tackle these issues. I wil
l first discuss generalizability of a class of provable defenses based on
randomized smoothing to various Lp and non-Lp attack models. Then\, I will
present adversarial attacks and defenses for a novel “perceptual” adversa
rial threat model. Remarkably\, the defense against perceptual threat mode
l generalizes well against many types of unforeseen Lp and non-Lp adversar
ial attacks.\n\nThis talk is based on joint works with Alex Levine\, Sahil
Singla\, Cassidy Laidlaw\, Aounon Kumar and Tom Goldstein.
DTSTART:20200623T163000Z
DTEND:20200623T174500Z
LAST-MODIFIED:20200619T121836Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111271
END:VEVENT
BEGIN:VEVENT
UID:5ba27986-871a-43ad-8942-1851914dd1c1
DTSTAMP:20200812T123701Z
CREATED:20200522T170347Z
DESCRIPTION:Topic: Knot concordance and 4-manifolds\n\nSpeaker: Lisa Piccir
illo\, Brandeis University/Massachusetts Institute of Technology\n\nThere
is a rich interplay between the fields of knot theory and 3- and 4-manifol
d topology. In this talk\, I will describe a weak notion of equivalence fo
r knots called concordance\, and highlight some historical and recent conn
ections between knot concordance and the study of 4-manifolds\, with a par
ticular emphasis on applications of knot concordance to the construction a
nd detection of small 4-manifolds which admit multiple smooth structures.
DTSTART:20200624T213000Z
DTEND:20200624T230000Z
LAST-MODIFIED:20200619T175732Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111056
END:VEVENT
BEGIN:VEVENT
UID:fbdf8b91-e9cc-44dc-b75a-184f4ed5e973
DTSTAMP:20200812T123701Z
CREATED:20200619T122716Z
DESCRIPTION:Topic: Instance-Hiding Schemes for Private Distributed Learning
\n\nSpeaker: Sanjeev Arora\, Princeton University\; Distinguishing Visitin
g Professor\, School of Mathematics\n\nAn important problem today is how t
o allow multiple distributed entities to train a shared neural network on
their private data while protecting data privacy. Federated learning is a
standard framework for distributed deep learning Federated Learning\, and
one would like to assure full privacy in that framework . The proposed met
hods\, such as homomorphic encryption and differential privacy\, come with
drawbacks such as large computational overhead or large drop in accuracy.
This work introduces a new and simple encryption of training data\, which
hides the information in it and allows its use in the usual deep learning
pipeline. The encryption is inspired by classic notion of instance-hiding
in cryptography. Experiments show that it allows training with fairly sma
ll effect on final accuracy.\n\nWe also give some theoretical analysis of
privacy guarantees for this encryption\, showing that violating privacy re
quires attackers to solve a difficult computational problem.\n\nJoint work
with Yangsibo Huang\, Zhao Song\, and Kai Li. To appear at ICML 2020.
DTSTART:20200625T190000Z
DTEND:20200625T203000Z
LAST-MODIFIED:20200619T190336Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111276
END:VEVENT
BEGIN:VEVENT
UID:6bd45e13-10fe-4572-abcd-71b3a90b7c9e
DTSTAMP:20200812T123701Z
CREATED:20200504T153057Z
DESCRIPTION:Topic: Distinguishing monotone Lagrangians via holomorphic annu
li\n\nSpeaker: Ailsa Keating\, University of Cambridge\n\nWe present techn
iques for constructing families of compact\, monotone (including exact) La
grangians in certain affine varieties\, starting with Brieskorn-Pham hyper
surfaces. We will focus on dimensions 2 and 3. In particular\, we'll expla
in how to set up well-defined counts of holomorphic annuli for a range of
these families. Time allowing\, we will give a number of applications.
DTSTART:20200626T131500Z
DTEND:20200626T143000Z
LAST-MODIFIED:20200622T153044Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/node/110846
END:VEVENT
BEGIN:VEVENT
UID:d4289e82-87aa-4dd7-b98a-3cfc8036a95d
DTSTAMP:20200812T123701Z
CREATED:20200619T124459Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200626T190000Z
DTEND:20200626T200000Z
LAST-MODIFIED:20200619T124459Z
LOCATION:Remote Event
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/node/111281
END:VEVENT
BEGIN:VEVENT
UID:3340d72f-7895-4de0-bbb8-d3be07d86dc1
DTSTAMP:20200812T123701Z
CREATED:20200625T174007Z
DESCRIPTION:Topic: Figuring Out Gas & Galaxies in Enzo (FOGGIE). III. The M
ocky Way: Investigating Biases in Observing the Milky Way's Circumgalactic
Medium\n\nSpeaker: Discussion Leader Yong Zheng\, University of Californi
a\, Berkeley\n\n
DTSTART:20200629T150000Z
DTEND:20200629T160000Z
LAST-MODIFIED:20200626T155942Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111326
END:VEVENT
BEGIN:VEVENT
UID:e1c32830-39e5-457f-93a5-b227d12b30b6
DTSTAMP:20200812T123701Z
CREATED:20200625T174721Z
DESCRIPTION:Topic: TBA\n\nSpeaker: Heather Knutson\, California Institute o
f Technology\n\n
DTSTART:20200629T161500Z
DTEND:20200629T171500Z
LAST-MODIFIED:20200626T160842Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111336
END:VEVENT
BEGIN:VEVENT
UID:86505436-858b-45f3-91f8-36230d456d50
DTSTAMP:20200812T123701Z
CREATED:20200625T173813Z
DESCRIPTION:
DTSTART:20200629T163000Z
DTEND:20200629T180000Z
LAST-MODIFIED:20200625T173813Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/node/111321
END:VEVENT
BEGIN:VEVENT
UID:8b992351-8ee3-4571-9f00-11e30d2e7b06
DTSTAMP:20200812T123701Z
CREATED:20200629T133303Z
DESCRIPTION:Topic: The Origin of Multiphase Galaxy Outflows\n\nSpeaker: Eva
n Schneider\, Princeton University\n\nStar-forming galaxies are often obse
rved to host outflows - gas that is flowing away from the galaxy in phases
ranging from cold molecular clouds to hot X-ray emitting plasma. While th
ese multiphase outflows are routinely observed\, theoretically constrainin
g their origin and evolution has proven difficult. Explaining the prevalen
ce and velocities of the cool ionized phase (T~10^4 K) in particular poses
a challenge. In this talk\, I will discuss a potential dual origin for th
is cool gas. Through a series of extremely high-resolution simulations run
with the GPU-based Cholla code\, I will show that in high star formation
surface density systems\, dense disk gas can be pushed out by the collecti
ve effect of clustered supernovae\, explaining the low-velocity material.
Subsequent shredding and mixing of these clouds creates gas with intermedi
ate densities and temperatures that is prone to radiative cooling\, allowi
ng momentum to transfer between phases and producing high velocity cool ga
s. In addition to explaining the nature of outflows themselves\, these mul
tiphase winds could potentially be a source of the cool photo-ionized gas
that is found in abundance in galaxy halos.
DTSTART:20200630T150000Z
DTEND:20200630T160000Z
LAST-MODIFIED:20200629T195229Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University 2020 Summer Colloquium Series - Added
URL:https://www.ias.edu/node/111371
END:VEVENT
BEGIN:VEVENT
UID:92a5c426-25a8-4f1b-88a0-2c886a6cf4bc
DTSTAMP:20200812T123701Z
CREATED:20200610T122747Z
DESCRIPTION:Topic: The reversibility paradox: 130 years after Loschmidt an
d Zermelo\n\nSpeaker: Laure Saint-Reymond\, École normale supérieure de Ly
on\n\nThe reversibility paradox is the objection that it should not be pos
sible to deduce an irreversible process from time-symmetric dynamics. A fi
rst result reconciling the fundamental microscopic physical processes (wit
h time reversal symmetry) and macroscopic models (satisfying the second la
w of thermodynamics) has been proved 50 years ago by Lanford. Our recent w
ork with T. Bodineau\, I. Gallagher\, and S. Simonella brings a new light
on this asymptotic derivation\, recovering some reversibility in the limit
.
DTSTART:20200701T213000Z
DTEND:20200701T230000Z
LAST-MODIFIED:20200626T120754Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111211
END:VEVENT
BEGIN:VEVENT
UID:57ce891e-916c-46b0-8c96-35134e2064e4
DTSTAMP:20200812T123701Z
CREATED:20200622T153746Z
DESCRIPTION:Topic: Infinite staircases and reflexive polygons\n\nSpeaker: A
na Rita Pires\, University of Edinburgh\n\nVideo: https://video.ias.edu/p
uias/2020/0703-AnaRitaPires\n\nA classic result\, due to McDuff and Schlen
k\, asserts that the function that encodes when a four-dimensional symplec
tic ellipsoid can be embedded into a four-dimensional ball has a remarkabl
e structure: the function has infinitely many corners\, determined by the
odd-index Fibonacci numbers\, that fit together to form an infinite stairc
ase. The work of McDuff and Schlenk has recently led to considerable inter
est in understanding when the ellipsoid embedding function for other sympl
ectic 4-manifolds is partly described by an infinite staircase. In this ta
lk we will discuss a general framework for analyzing this question for a l
arge family of targets\, and in particular give an obstruction to the exis
tence of an infinite staircase that experimentally seems strong.\n\nWe wil
l then look at the special case of rational convex toric domains / closed
symplectic toric manifolds\, for which we prove the existence of six famil
ies of targets with infinite staircases that are distinguished by the fact
that their moment polygon is reflexive. The proof uses\, among other tool
s\, almost toric fibrations -- see also the second of the ellipsoid day ta
lks.\n\nFinally\, we conjecture that these six families constitute a compl
ete answer to the question of existence of infinite staircase. This conjec
ture has been verified in the case when the target is an ellipsoid -- see
the third of the ellipsoid day talks.\n\nThis is based on joint work of Da
n Cristofaro-Gardiner\, Tara Holm\, Alessia Mandini\, and Ana Rita Pires.
DTSTART:20200703T131500Z
DTEND:20200703T143000Z
LAST-MODIFIED:20200708T182528Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/node/111291
END:VEVENT
BEGIN:VEVENT
UID:70d2f9f0-52a5-4029-9e35-d5d19032c393
DTSTAMP:20200812T123701Z
CREATED:20200625T174215Z
DESCRIPTION:Topic: SatGen: A Semi-analytical Satellite Galaxy Generator --
I. The model and its application to Local-Group satellite statistics \n\nSp
eaker: Discussion Leader Fangzhou Jiang\, California Institute of Technolo
gy and Carnegie Observatories\n\n
DTSTART:20200706T150000Z
DTEND:20200706T160000Z
LAST-MODIFIED:20200702T174953Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111331
END:VEVENT
BEGIN:VEVENT
UID:a847ce2d-9e9a-4d08-9bd5-9efcee4a3fcb
DTSTAMP:20200812T123701Z
CREATED:20200702T160645Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200706T161500Z
DTEND:20200706T171500Z
LAST-MODIFIED:20200702T160645Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111441
END:VEVENT
BEGIN:VEVENT
UID:0ae34101-83cb-41ef-acc4-3060259195ce
DTSTAMP:20200812T123701Z
CREATED:20200702T160531Z
DESCRIPTION:
DTSTART:20200706T163000Z
DTEND:20200706T180000Z
LAST-MODIFIED:20200702T160531Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/node/111436
END:VEVENT
BEGIN:VEVENT
UID:17737b89-7d78-4ecf-bd2f-e3ba1b85f9ca
DTSTAMP:20200812T123701Z
CREATED:20200702T204049Z
DESCRIPTION:Topic: Exploring Planets Orbiting Nearby Stars\n\nSpeaker: Cour
tney Dressing\, University of California—Berkeley\n\nThe NASA Kepler missi
on revealed that our Galaxy is teeming with planetary systems and that Ear
th-sized planets are common\, but most of the planets detected by Kepler o
rbit stars that are too faint to permit detailed study. Excitingly\, the N
ASA Transiting Exoplanet Survey Satellite (TESS) launched in April 2018 an
d is finding hundreds of small planets orbiting stars that are much closer
and brighter. Unlike the Kepler planets\, the TESS planets are ideal targ
ets for follow-up observations to determine their masses\, compositions\,
and atmospheric properties. I will describe the TESS mission and explain h
ow in-depth analyses of the TESS planets will allow us to probe the compos
itional diversity of small planets\, investigate the formation of planetar
y systems\, and set the stage for the next phase of exoplanet exploration:
the quest for biosignatures in the atmospheres of strange new worlds.
DTSTART:20200707T150000Z
DTEND:20200707T160000Z
LAST-MODIFIED:20200702T204049Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University 2020 Summer Colloquium Series
URL:https://www.ias.edu/node/111451
END:VEVENT
BEGIN:VEVENT
UID:b779f9d3-6c84-411b-acdf-956657ecc160
DTSTAMP:20200812T123701Z
CREATED:20200630T125136Z
DESCRIPTION:Topic: Machine learning-based design (of proteins\, small molec
ules and beyond)\n\nSpeaker: Jennifer Listgarten\, University of Californi
a\, Berkeley\n\nVideo: https://video.ias.edu/machinelearning/2020/0707-Jen
niferListgarten\n\nData-driven design is making headway into a number of a
pplication areas\, including protein\, small-molecule\, and materials engi
neering. The design goal is to construct an object with desired properties
\, such as a protein that binds to a target more tightly than previously o
bserved. To that end\, costly experimental measurements are being replaced
with calls to a high-capacity regression model trained on labeled data\,
which can be leveraged in an in silico search for promising design candida
tes. The aim then is to discover designs that are better than the best des
ign in the observed data. This goal puts machine-learning based design in
a much more difficult spot than traditional applications of predictive mod
elling\, since successful design requires\, by definition\, some degree of
extrapolation---a pushing of the predictive models to its unknown limits\
, in parts of the design space that are a priori unknown. In this talk\, I
will anchor this overall problem in protein engineering\, and discuss our
emerging approaches to tackle it.
DTSTART:20200707T163000Z
DTEND:20200707T174500Z
LAST-MODIFIED:20200710T130411Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111386
END:VEVENT
BEGIN:VEVENT
UID:8aa4d221-befc-47d9-9c3f-54ee89be741d
DTSTAMP:20200812T123701Z
CREATED:20200522T165936Z
DESCRIPTION:Topic: Weyl laws and dense periodic orbits\n\nSpeaker: Michael
Hutchings\, University of California\, Berkeley\n\nWe review a 'Weyl law'
in embedded contact homology\, relating periods of orbits of the Reeb vect
or field on a contact three-manifold to volume. (This was also mentioned i
n the talk by Dan Cristofaro-Gardiner.) We explain a clever argument by Ke
i Irie which deduces from this that a generic contact form has dense perio
dic orbits. There is also a parallel story for minimal surfaces.
DTSTART:20200708T213000Z
DTEND:20200708T230000Z
LAST-MODIFIED:20200702T181000Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111046
END:VEVENT
BEGIN:VEVENT
UID:eacb68e5-fcf4-4024-8533-929730d0c2b2
DTSTAMP:20200812T123701Z
CREATED:20200630T130242Z
DESCRIPTION:Topic: Role of Interaction in Competitive Optimization\n\nSpeak
er: Anima Anandkumar\, California Institute of Technology\n\nVideo: https:
//video.ias.edu/machinelearning/2020/0709-AnimaAnandkumar\n\nCompetitive o
ptimization is needed for many ML problems such as training GANs\, robust
reinforcement learning\, and adversarial learning. Standard approaches to
competitive optimization involve each agent independently optimizing their
objective functions using SGD or other gradient-based approaches. However
\, they suffer from oscillations and instability\, since the optimization
does not account for interaction among the players. We introduce competiti
ve gradient descent (CGD) that explicitly incorporates interaction by solv
ing for Nash equilibrium of a local game. We extend CGD to competitive mir
ror descent (CMD) for solving conically constrained competitive problems b
y using the dual geometry induced by a Bregman divergence.\n\nWe demonstra
te the effectiveness of our approach for training GANs and solving constra
ined reinforcement learning (RL) problems. We also derive a competitive po
licy optimization method to train RL agents in competitive games. Finally\
, we provide a novel perspective on training GANs by pointing out the 'GAN
-dilemma' a fundamental flaw of the divergence-minimization perspective on
GANs. Instead\, we argue that an implicit competitive regularization due
to simultaneous training methods\, such as CGD\, is a crucial mechanism be
hind GAN performance.
DTSTART:20200709T190000Z
DTEND:20200709T203000Z
LAST-MODIFIED:20200710T130442Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111396
END:VEVENT
BEGIN:VEVENT
UID:68eb3046-9d12-4384-8459-db7d840f8778
DTSTAMP:20200812T123701Z
CREATED:20200630T130959Z
DESCRIPTION:Topic: Knot Floer homology and bordered algebras\n\nSpeaker: Pe
ter Ozsváth\, Princeton University\n\nVideo: https://video.ias.edu/puias/2
020/0710-PeterOzsvath\n\nKnot Floer homology is an invariant for knots in
three-space\, defined as a Lagrangian Floer homology in a symmetric produc
t. It has the form of a bigraded vector space\, encoding topological infor
mation about the knot. I will discuss an algebraic approach to computing k
not Floer homology\, and a corresponding version for links\, based on deco
mposing knot diagrams.\n\nThis is joint work with Zoltan Szabo\, building
on earlier joint work (bordered Heegaard Floer homology) with Robert Lipsh
itz and Dylan Thurston.
DTSTART:20200710T131500Z
DTEND:20200710T143000Z
LAST-MODIFIED:20200710T235922Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/node/111406
END:VEVENT
BEGIN:VEVENT
UID:4cab0232-b7be-44fa-bf90-f8648dd63f1d
DTSTAMP:20200812T123701Z
CREATED:20200710T155854Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200710T190000Z
DTEND:20200710T200000Z
LAST-MODIFIED:20200710T155854Z
LOCATION:Remote Event
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/node/111616
END:VEVENT
BEGIN:VEVENT
UID:acbec6ce-bb1c-4118-98fe-1a62d3f5ef92
DTSTAMP:20200812T123701Z
CREATED:20200709T210518Z
DESCRIPTION:Topic: Pressure Balance in the Multiphase ISM of Cosmologically
Simulated Disk Galaxies\n\nSpeaker: Discussion Leader Alex Gurvich\, Nort
hwestern University\n\n
DTSTART:20200713T150000Z
DTEND:20200713T160000Z
LAST-MODIFIED:20200709T211256Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111576
END:VEVENT
BEGIN:VEVENT
UID:f458c521-e511-4bba-97a9-7d032219f72a
DTSTAMP:20200812T123701Z
CREATED:20200709T205035Z
DESCRIPTION:Topic: A Stellar Age Dependence of the Planet Radius Gap\n\nSpe
aker: Travis Berger\, University of Hawaii\n\nA major bottleneck for Keple
r exoplanet demographics has been the lack of precise properties for most
of the observed stars. In this talk\, I will present the first homogeneous
and precise characterization of all Kepler targets using Gaia DR2. Applyi
ng these improved stellar parameters to revise exoplanet properties\, I wi
ll present the dependence of the planet radius gap on stellar mass and age
for the full Kepler exoplanet sample and discuss implications for the com
peting theories of core-powered mass-loss and photoevaporation. In particu
lar\, I will present first evidence for the planet radius gap's dependence
on stellar age on timescales of a Gyr\, a result that is only predicted b
y core-powered mass-loss. In addition\, I will show that low-flux sub-Nept
unes appear to shrink on Gyr timescales\, suggesting that most of these pl
anets possess H/He envelopes that measurably contract over Gyr timescales
as opposed to higher mean molecular weight atmospheres. Finally\, I will r
eveal that there are bona-fide planets within the 'hot sub-Neptunian deser
t' and show that these planets are preferentially orbiting more evolved st
ars compared to other planets at similar incident fluxes. The results deta
iled here demonstrate the potential for transformative characterization of
stellar and exoplanet populations using Gaia data.
DTSTART:20200713T161500Z
DTEND:20200713T171500Z
LAST-MODIFIED:20200709T210040Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111561
END:VEVENT
BEGIN:VEVENT
UID:f8ce02d1-bbae-4bd7-8ee5-a79980c02f0d
DTSTAMP:20200812T123701Z
CREATED:20200709T204628Z
DESCRIPTION:
DTSTART:20200713T163000Z
DTEND:20200713T180000Z
LAST-MODIFIED:20200709T204628Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/node/111546
END:VEVENT
BEGIN:VEVENT
UID:b6e744ac-714f-4c02-b19b-48d2a0e92640
DTSTAMP:20200812T123701Z
CREATED:20200709T204130Z
DESCRIPTION:Topic: Promoting Diversity and Addressing Barriers in Physics\n
\nSpeaker: Geraldine Cochran\, Rutgers University\n\nIn this presentation\
, I will discuss the ways in which physicists have engaged in diversity wo
rk over the past twenty years. I will analyze these methods using a critic
al framework. I will then discuss efforts to address barriers to diversity
in physics graduate programs by discussing the results of two research st
udies on graduate education in physics.
DTSTART:20200714T150000Z
DTEND:20200714T160000Z
LAST-MODIFIED:20200709T204130Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University 2020 Summer Colloquium Series
URL:https://www.ias.edu/node/111541
END:VEVENT
BEGIN:VEVENT
UID:89d4c0ba-6786-4398-b60b-67a85fa791ce
DTSTAMP:20200812T123701Z
CREATED:20200705T213719Z
DESCRIPTION:Topic: Relaxing the I.I.D. Assumption: Adaptive Minimax Optimal
Sequential Prediction with Expert Advice\n\nSpeaker: Jeffrey Negrea\, Uni
versity of Toronto\n\nWe consider sequential prediction with expert advice
when the data are generated stochastically\, but the distributions genera
ting the data may vary arbitrarily among some constraint set. We quantify
relaxations of the classical I.I.D. assumption in terms of possible constr
aint sets\, with I.I.D. at one extreme\, and an adversarial mechanism at t
he other. The Hedge algorithm\, long known to be minimax optimal for in th
e adversarial regime\, has recently been shown to also be minimax optimal
in the I.I.D. setting. We show that Hedge is sub-optimal between these ext
remes\, and present a new algorithm that is adaptively minimax optimal wit
h respect to our relaxations of the I.I.D. assumption\, without knowledge
of which setting prevails.
DTSTART:20200714T163000Z
DTEND:20200714T174500Z
LAST-MODIFIED:20200705T213719Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111456
END:VEVENT
BEGIN:VEVENT
UID:00fe4dee-25ba-42b8-8b7d-982830143ee8
DTSTAMP:20200812T123701Z
CREATED:20200608T185649Z
DESCRIPTION:Topic: On the cap-set problem and the slice rank polynomial met
hod\n\nSpeaker: Lisa Sauermann\, Stanford University\n\nIn 2016\, Ellenber
g and Gijswijt made a breakthrough on the famous cap-set problem\, which a
sks about the maximum size of a subset of \mathbb{F}_3^n not containing a
three-term arithmetic progression. Ellenberg and Gijswijt proved that any
such set has size at most 2.756^n. Their proof used a new polynomial metho
d introduced by Croot\, Lev and Pach just a few weeks earlier. In this tal
k\, we will discuss the proof of the Ellenberg-Gijswijt bound\, following
a reformulation of their original proof by Tao. In this reformulation\, Ta
o introduced what is now called the slice rank polynomial method. At the e
nd of the talk\, we will also discuss further applications as well as limi
tations of the slice rank polynomial method.
DTSTART:20200715T213000Z
DTEND:20200715T230000Z
LAST-MODIFIED:20200713T144250Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111206
END:VEVENT
BEGIN:VEVENT
UID:2f8b4005-e7b2-4ea1-92b3-41b1dc767076
DTSTAMP:20200812T123701Z
CREATED:20200630T131208Z
DESCRIPTION:Speaker: Yusuke Kawamoto\, Shira Tanny\, Javier Martínez-Aguina
ga \, École Normale Supérieure\, Tel Aviv University\, Complutensian Unive
rsity of Madrid\n\nVideo: https://video.ias.edu/sg/2022/0717-various\n\nYu
suke Kawamoto:Homogeneous quasimorphism\, C^0-topology and Lagrangian inte
rsection\n\nAbstract: We construct an example of a non-trivial homogeneous
quasimorphism on the group of Hamiltonian diffeomorphisms of the $2$- and
$4$-dimensional quadric which is continuous with respect to both $C^0$-to
pology and the Hofer metric. This answers a variant of a question of Entov
-Polterovich-Py which is one of the open problems listed in the monograph
of McDuff-Salamon. A comparison of spectral invariants for quantum cohomol
ogy rings with different coefficient fields plays a crucial role in the pr
oof which might be of independent interest.\n\nShira Tanny: Floer theory o
f disjointly supported Hamiltonians\n\nAbstract. We discuss the Floer-theo
retic interaction between disjointly supported Hamiltonians\, a problem co
nsidered earlier by Polterovich\, Seyfaddini\, Ishikawa and Humilière-Le R
oux-Seyfaddini. In aspherical symplectic manifolds\, we find new constrain
ts on Floer trajectories\, and derive applications to spectral invariants
and the boundary depth\, as well as to the action selector constructed by
Abbondandolo\, Haug\, and Schlenk. Furthermore\, we prove that the spectra
l invariants\, with respect to the fundamental and point classes\, of Hami
ltonians supported in certain domains\, are independent of the ambient man
ifold. This is a joint work in progress with Yaniv Ganor.\n\nJavier Martín
ez-Aguinaga: Formal Legendrian and horizontal embeddings\n\nAbstract. In t
his talk we will discuss some recent results about the space of Formal Leg
endrian embeddings in contact 3-manifolds and Formal Horizontal embeddings
in Engel manifolds. At the π0−level\, formal invariants of Legendrian emb
eddings correspond to the well understood classical invariants. We will in
troduce analogous invariants at the π1−level\, which can be described in a
geometrical way. As an application we can construct new examples of non-t
rivial loops of Legendrian embeddings which are trivial as loops of smooth
embeddings. Joint work with Eduardo Fernández (ICMAT-UCM) and Francisco P
resas (ICMAT).
DTSTART:20200717T131500Z
DTEND:20200717T143000Z
LAST-MODIFIED:20200719T191115Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/node/111411
END:VEVENT
BEGIN:VEVENT
UID:6f8b5cab-2391-44c4-8aef-00cc79aec08f
DTSTAMP:20200812T123701Z
CREATED:20200709T210535Z
DESCRIPTION:Topic: Multi-Messenger Gravitational Wave Searches with Pulsar
Timing Arrays: Application to 3C66B Using the NANOGrav 11-year Data Set\n
\nSpeaker: Discussion Leader Chiara Mingarelli\, University of Connecticut
/Flatiron Institute Center for Computational Astrophysics\n\n
DTSTART:20200720T150000Z
DTEND:20200720T160000Z
LAST-MODIFIED:20200717T134424Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111581
END:VEVENT
BEGIN:VEVENT
UID:f3f69f73-6806-44d8-b9b7-6331a9d48f0b
DTSTAMP:20200812T123701Z
CREATED:20200709T205451Z
DESCRIPTION:Topic: Evidence for a High Mutual Inclination Between the Cold
Jupiter and Transiting Super Earth Orbiting π Men\n\nSpeaker: Jerry Xuan\,
University of Cambridge\n\nπ Men hosts a transiting super Earth (P ≈ 6.27
days\, m ≈ 4.82 M_E\, R ≈ 2.04 R_E) discovered by TESS and a cold Jupiter
(P ≈ 2093 days\, m sin(I) ≈ 10.02 M_J\, e ≈ 0.64) discovered from radial
velocity. We use Gaia DR2 and Hipparcos astrometry to derive the star’s ve
locity caused by the orbiting planets and constrain the inclination of the
cold Jupiter (I = 41-65°)\, as well as its true mass and ascending node.
From this we derive the mutual inclination (ΔI) between the two planets\,
and find that 49°
DTSTART:20200720T161500Z
DTEND:20200720T171500Z
LAST-MODIFIED:20200717T154727Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111566
END:VEVENT
BEGIN:VEVENT
UID:700c5405-bd3d-4e65-a05f-9ac3fef2c385
DTSTAMP:20200812T123701Z
CREATED:20200709T204648Z
DESCRIPTION:
DTSTART:20200720T163000Z
DTEND:20200720T180000Z
LAST-MODIFIED:20200709T204648Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/node/111551
END:VEVENT
BEGIN:VEVENT
UID:d1fde643-09ab-4eab-b02c-40afe9f3b3f0
DTSTAMP:20200812T123701Z
CREATED:20200717T173132Z
DESCRIPTION:Topic: Observations of the Gas Flows That Govern Galaxy Evoluti
on in Absorption and Emission at z<1\n\nSpeaker: Sean Johnson\, Princeton
University\n\nGalaxy growth is regulated by gas accretion from the interga
lactic medium (IGM) and feedback from supernova and AGN driven winds. The
low-density halo gas around galaxies known as the circum-galactic medium (
CGM) is at the nexus of these baryon cycles and represents both a dominant
reservoir for fueling future growth and a fossil record of past feedback.
Advancing our physical understanding of galaxy evolution\, therefore\, re
quires observations of the gas cycles between the interstellar medium (ISM
)\, CGM\, and IGM. I will review three recent/on-going surveys that provid
e unique insights into the gas flows around galaxies through the combinati
on of multi-wavelength datasets from Hubble\, Magellan\, and VLT. These su
rveys demonstrate that: (1) Metal-enriched gas around low-redshift galaxie
s is predominantly confined to galaxy halos -- even in the shallow-potenti
al wells of low-mass star-forming dwarfs. (2) Galaxy interactions play a k
ey role in distributing gas from the ISM to the CGM while also likely trig
gering black hole growth. And (3) the putative hot wind component of AGN o
utflows is dynamically unimportant in a prototypical galactic-scale AGN su
perwind. Each of these results represents a surprising first glance from o
n-going surveys that will expand dramatically over the next few years.
DTSTART:20200721T150000Z
DTEND:20200721T160000Z
LAST-MODIFIED:20200717T173132Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University 2020 Summer Colloquium Series
URL:https://www.ias.edu/node/111766
END:VEVENT
BEGIN:VEVENT
UID:f2c3a54b-8d09-4834-94d2-580ab37989b5
DTSTAMP:20200812T123701Z
CREATED:20200630T125706Z
DESCRIPTION:Topic: Graph Nets: The Next Generation\n\nSpeaker: Max Welling\
, University of Amsterdam\n\nVideo: https://video.ias.edu/machinelearning/
2020/0721-MaxWelling\n\nIn this talk I will introduce our next generation
of graph neural networks. GNNs have the property that they are invariant t
o permutations of the nodes in the graph and to rotations of the graph as
a whole. We claim this is unnecessarily restrictive and in this talk we wi
ll explore extensions of these GNNs to more flexible equivariant construct
ions. In particular\, Natural Graph Networks for general graphs are global
ly equivariant under permutations of the nodes but can still be executed t
hrough local message passing protocols. Our mesh-CNNs on manifolds are equ
ivariant under SO(2) gauge transformations and as such\, unlike regular GN
Ns\, entertain non-isotropic kernels. And finally our SE(3)-transformers a
re local message passing GNNs\, invariant to permutations but equivariant
to global SE(3) transformations. These developments clearly emphasize the
importance of geometry and symmetries as design principles for graph (or o
ther) neural networks.\n\nJoint with: Pim de Haan and Taco Cohen (Natural
Graph Networks) Pim de Haan\, Maurice Weiler and Taco Cohen (Mesh-CNNs) Fa
bian Fuchs and Daniel Worrall (SE(3)-Transformers)
DTSTART:20200721T163000Z
DTEND:20200721T174500Z
LAST-MODIFIED:20200723T204528Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111391
END:VEVENT
BEGIN:VEVENT
UID:e1c1054b-3559-4c9f-8778-b7f203bbf9cf
DTSTAMP:20200812T123701Z
CREATED:20200522T172515Z
DESCRIPTION:Topic: Singularities of solutions of the Hamilton-Jacobi equati
on. A toy model: distance to a closed subset.\n\nSpeaker: Albert Fathi\, G
eorgia Institute of Technology\n\nThis is a joint work with Piermarco Cann
arsa and Wei Cheng.\n\nMost of the lecture is about the distance function
to a closed subset in Euclidean subset\, at the level of a beginning gradu
ate student.\n\nIf $A$ is a closed subset of the Euclidean space $\mathbb
R^k$\, the Euclidean distance function $d_A: \mathbb R^k\to [0\,+\infty[$
is defined by $d_A(x)=\min_{a\in A}\Vert x-a\Vert$. This function is Lipsc
hitz\, therefore differentiable almost everywhere. We will give topologica
l properties of the set ${\rm Sing}(F)$ of points in $\mathbb R^k\setminus
M$ where $F$ is not differentiable. For example it is locally connected.
We will also discuss the homotopy type of ${\rm Sing}(F)$. We will sketch
a proof.\n\nAlthough\, we will concentrate on $d_A$\, if time permits: 1)
We will give applications in Riemannian geometry: Topology of the pairs of
points that can be joined by at least 2 minimizing geodesics. 2) We will
explain that it is a particular case of a more general result on the singu
larities of a viscosity solution $U:M\times ]0\,+\infty[\to \mathbb R$ of
the evolution Hamilton-Jacobi equation $$\partial_tU+H(x\,\partial_xU)=0\,
$$ where $H:TM\to \mathbb R\, (x\,p)\mapsto H(x\,p)$ is a C$^2$ Tonelli Ha
miltonian\, i.e. convex and superlinear in the momentum $p$\, on the smoot
h manifold $M$.
DTSTART:20200722T213000Z
DTEND:20200722T230000Z
LAST-MODIFIED:20200717T180149Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111061
END:VEVENT
BEGIN:VEVENT
UID:9a9dccae-af86-42d3-9772-b535500e2761
DTSTAMP:20200812T123701Z
CREATED:20200630T130534Z
DESCRIPTION:Topic: Priors for Semantic Variables\n\nSpeaker: Yoshua Bengio\
, Université de Montréal\n\nVideo: https://video.ias.edu/machinelearning/2
020/0723-YoshuaBengio\n\nSome of the aspects of the world around us are ca
ptured in natural language and refer to semantic high-level variables\, wh
ich often have a causal role (referring to agents\, objects\, and actions
or intentions). These high-level variables also seem to satisfy very pecul
iar characteristics which low-level data (like images or sounds) do not sh
are\, and it would be good to clarify these characteristics in the form of
priors which can guide the design of machine learning systems benefitting
from these assumptions. Since these priors are not just about the joint d
istribution between the semantic variables (e.g. it has a sparse factor gr
aph corresponding to a modular decomposition of knowledge) but also about
how the distribution changes (typically by causal interventions)\, this an
alysis may also help to build machine learning systems which can generaliz
e better out-of-distribution. Introducing such assumptions is necessary to
even start having a theory about generalizing out-of-distribution. There
are also fascinating connections between these priors and what is hypothes
ized about conscious processing in the brain\, with conscious processing a
llowing us to reason (i.e.\, perform chains of inferences about the past a
nd the future\, as well as credit assignment) at the level of these high-l
evel variables. This involves attention mechanisms and short-term memory t
o form a bottleneck of information being broadcast around the brain betwee
n different parts of it\, as we focus on different high-level variables an
d some of their interactions. The presentation summarizes a few recent res
ults using some of these ideas for discovering causal structure and modula
rizing recurrent neural networks with attention mechanisms in order to obt
ain better out-of-distribution generalization and move deep learning towar
ds capturing some of the functions associated with conscious processing ov
er high-level semantic variables.
DTSTART:20200723T190000Z
DTEND:20200723T203000Z
LAST-MODIFIED:20200723T204602Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111401
END:VEVENT
BEGIN:VEVENT
UID:de4a5b8b-3094-4209-bf56-6a8a7f6d0c59
DTSTAMP:20200812T123701Z
CREATED:20200630T131444Z
DESCRIPTION:Topic: Pontryagin - Thom for orbifold bordism\n\nSpeaker: John
Pardon\, Princeton University\n\nVideo: https://video.ias.edu/puias/2020/0
724-JohnPardon\n\nThe classical Pontryagin–Thom isomorphism equates manifo
ld bordism groups with corresponding stable homotopy groups. This construc
tion moreover generalizes to the equivariant context. I will discuss work
which establishes a Pontryagin--Thom isomorphism for orbispaces (an orbisp
ace is a 'space' which is locally modelled on Y/G for Y a space and G a fi
nite group\; examples of orbispaces include orbifolds and moduli spaces of
pseudo-holomorphic curves). This involves defining a category of orbispec
tra and an involution of this category extending Spanier--Whitehead dualit
y. Global homotopy theory also plays a key role.
DTSTART:20200724T131500Z
DTEND:20200724T143000Z
LAST-MODIFIED:20200727T124359Z
LOCATION:Remote Access - see Zoom link below
SUMMARY:IAS/PU-Montreal-Paris-Tel-Aviv Symplectic Geometry Zoominar
URL:https://www.ias.edu/node/111416
END:VEVENT
BEGIN:VEVENT
UID:68735f1c-14d3-48ef-954c-c06bcd420f29
DTSTAMP:20200812T123701Z
CREATED:20200717T172435Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200724T190000Z
DTEND:20200724T200000Z
LAST-MODIFIED:20200717T172435Z
LOCATION:Remote Event
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/node/111761
END:VEVENT
BEGIN:VEVENT
UID:4f3a081b-92f4-4d5e-a039-94004a642248
DTSTAMP:20200812T123702Z
CREATED:20200709T210555Z
DESCRIPTION:Topic: How Stellar Rotation Shapes the Colour-Magnitude Diagram
of the Massive Intermediate-Age Star Cluster NGC 1846\n\nSpeaker: Discuss
ion Leader Sebastian Kamann\, Liverpool John Moores University\n\n
DTSTART:20200727T150000Z
DTEND:20200727T160000Z
LAST-MODIFIED:20200724T191551Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111586
END:VEVENT
BEGIN:VEVENT
UID:32732451-9d94-4ccd-8dae-3ea96008d6d2
DTSTAMP:20200812T123702Z
CREATED:20200709T205517Z
DESCRIPTION:
DTSTART:20200727T161500Z
DTEND:20200727T171500Z
LAST-MODIFIED:20200727T131908Z
LOCATION:Meeting Cancelled
SUMMARY:Princeton University Exoplanet Discussion Group - Cancelled
URL:https://www.ias.edu/node/111571
END:VEVENT
BEGIN:VEVENT
UID:991982b2-bf52-488a-a381-0018c86ac396
DTSTAMP:20200812T123702Z
CREATED:20200709T204712Z
DESCRIPTION:
DTSTART:20200727T163000Z
DTEND:20200727T180000Z
LAST-MODIFIED:20200709T204712Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/node/111556
END:VEVENT
BEGIN:VEVENT
UID:d4308dbe-8a58-4588-8cb3-6df497298503
DTSTAMP:20200812T123702Z
CREATED:20200723T133809Z
DESCRIPTION:Topic: Equity in Science: Representation\, Culture\, and the Dy
namics of Change in Graduate Education\n\nSpeaker: Julie Posselt\, Pullias
Center for Higher Education-University of Southern California\n\nSTEM dis
ciplines are believed to be founded on the idea of meritocracy\; recogniti
on earned by the value of the data\, which is objective. Such disciplinary
cultures resist concerns about implicit or structural biases\, and yet\,
year after year\, scientists observe persistent gender and racial inequali
ties in their labs\, departments\, and programs. In Equity in Science\, to
be released by Stanford University Press on 9/1/2020\, University of Sout
hern California professor Julie Posselt makes the case that understanding
how field-specific cultures develop is a crucial step for bringing about r
eal change. She does this by examining existing equity\, diversity\, and i
nclusion efforts across astronomy\, physics\, chemistry\, geology\, and ps
ychology. These ethnographic case studies reveal the subtle ways that excl
usion and power operate in scientific organizations and\, sometimes\, with
in change efforts themselves. In this colloquium Posselt will share from t
wo chapters of the book: 1) how quantum physics can inform our understandi
ng of organizational change\, and 2) how this is playing out very differen
tly with respect to reform of graduate education in the neighboring discip
lines of physics and astronomy. Posselt closes with targeted recommendatio
ns for individuals and departments determined to be part of the solution.
DTSTART:20200728T150000Z
DTEND:20200728T160000Z
LAST-MODIFIED:20200723T133809Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University 2020 Summer Colloquium Series
URL:https://www.ias.edu/node/111786
END:VEVENT
BEGIN:VEVENT
UID:8f1540bc-147c-4321-9527-53bae915c951
DTSTAMP:20200812T123702Z
CREATED:20200714T134621Z
DESCRIPTION:Topic: Generalized Energy-Based Models\n\nSpeaker: Arthur Grett
on\, University College London\n\nI will introduce Generalized Energy Base
d Models (GEBM) for generative modelling. These models combine two trained
components: a base distribution (generally an implicit model)\, which can
learn the support of data with low intrinsic dimension in a high dimensio
nal space\; and an energy function\, to refine the probability mass on the
learned support. Both the energy function and base jointly constitute the
final model\, unlike GANs\, which retain only the base distribution (the
'generator'). In particular\, while the energy function is analogous to th
e GAN critic function\, it is not discarded after training.\nGEBMs are tra
ined by alternating between learning the energy and the base. Both trainin
g stages are well-defined: the energy is learned by maximising a generaliz
ed likelihood\, and the resulting energy-based loss provides informative g
radients for learning the base. Samples from the posterior on the latent s
pace of the trained model can be obtained via MCMC\, thus finding regions
in this space that produce better quality samples. Empirically\, the GEBM
samples on image-generation tasks are of much better quality than those fr
om the learned generator alone\, indicating that all else being equal\, th
e GEBM will outperform a GAN of the same complexity. GEBMs also return sta
te-of-the-art performance on density modelling tasks\, and when using base
measures with an explicit form.
DTSTART:20200728T163000Z
DTEND:20200728T174500Z
LAST-MODIFIED:20200730T122159Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111646
END:VEVENT
BEGIN:VEVENT
UID:7c0c0293-508b-4ce9-b087-8746c84c72cf
DTSTAMP:20200812T123702Z
CREATED:20200724T195323Z
DESCRIPTION:Topic: Hubble at 30\n\nSpeaker: David Leckrone\, NASA's Goddard
Space Flight Center\n\nThis year we celebrate the 30th anniversary of the
launch of the Hubble Space Telescope. For three decades thousands of astr
onomers from around the world have exploited the remarkable capabilities o
f the telescope and its scientific instruments to revolutionize our unders
tanding of the universe. Five Shuttle-based servicing missions kept Hubble
in good repair and technologically up-to-date. Even though it has been ov
er ten years since the last servicing mission\, the observatory remains hi
ghly productive and reasonably healthy. Hubble has established the paradig
m for a long-lived 'mountain top' observatory in space.\n\nIn this talk\,
David Leckrone\, emeritus senior scientist at NASA's Goddard Space Flight
Center\, discusses several long threads of discovery that were made possib
le by Hubble’s extended lifetime and regular modernization. He will also r
ecall some of the moments of high adventure that we experienced during the
servicing missions and pay tribute to the unsung heroes who rose to the r
escue when things looked dire for the observatory.\n\nThe John N. Bahcall
Lecture is sponsored by the Space Telescope Science Institute and the Hubb
le Space Telescope Project/NASA Goddard Space Flight Center.
DTSTART:20200729T000000Z
DTEND:20200729T010000Z
LAST-MODIFIED:20200724T195632Z
LOCATION:Presented Online
SUMMARY:Smithsonian National Air and Space Museum - The John N. Bahcall Pu
blic Lecture
URL:https://www.ias.edu/node/111816
END:VEVENT
BEGIN:VEVENT
UID:5181c5e0-d634-481e-9a87-5ea60bd7f45c
DTSTAMP:20200812T123702Z
CREATED:20200714T134846Z
DESCRIPTION:Topic: Efficient Robot Skill Learning via Grounded Simulation L
earning\, Imitation Learning from Observation\, and Off-Policy Reinforceme
nt Learning\n\nSpeaker: Peter Stone\, The University of Texas at Austin\n
\nFor autonomous robots to operate in the open\, dynamically changing worl
d\, they will need to be able to learn a robust set of skills from relativ
ely little experience. This talk begins by introducing Grounded Simulation
Learning as a way to bridge the so-called reality gap between simulators
and the real world in order to enable transfer learning from simulation to
a real robot. It then introduces two new algorithms for imitation learnin
g from observation that enable a robot to mimic demonstrated skills from s
tate-only trajectories\, without any knowledge of the actions selected by
the demonstrator. Connections to theoretical advances in off-policy reinfo
rcement learning will be highlighted throughout.\n\nGrounded Simulation Le
arning has led to the fastest known stable walk on a widely used humanoid
robot\, and imitation learning from observation opens the possibility of r
obots learning from the vast trove of videos available online.
DTSTART:20200730T190000Z
DTEND:20200730T203000Z
LAST-MODIFIED:20200722T102602Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111651
END:VEVENT
BEGIN:VEVENT
UID:d8defb54-e0be-4f03-bad0-86a6492a2077
DTSTAMP:20200812T123702Z
CREATED:20200709T210659Z
DESCRIPTION:Topic: Stellar Kinematics and Environment at z ∼ 0.8 in the LEG
A-C Survey: Massive Slow Rotators Are Built First in Overdense Environment
s\n\nSpeaker: Discussion Leader Rachel Bezanson\, University of Pittsburg
\n\n
DTSTART:20200803T150000Z
DTEND:20200803T160000Z
LAST-MODIFIED:20200731T193732Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111591
END:VEVENT
BEGIN:VEVENT
UID:1bed89a8-b329-40f3-aee9-1d5bf33bb035
DTSTAMP:20200812T123702Z
CREATED:20200730T150303Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200803T161500Z
DTEND:20200803T171500Z
LAST-MODIFIED:20200730T150303Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111831
END:VEVENT
BEGIN:VEVENT
UID:d7a611c4-207b-46b4-a3f6-88a41c54192b
DTSTAMP:20200812T123702Z
CREATED:20200730T151138Z
DESCRIPTION:
DTSTART:20200803T163000Z
DTEND:20200803T180000Z
LAST-MODIFIED:20200730T151138Z
LOCATION:Until further notice\, meetings will be held remotely on Zoom.
SUMMARY:Institute for Advanced Study/Princeton University Early Universe/Co
smology Lunch Discussion
URL:https://www.ias.edu/node/111851
END:VEVENT
BEGIN:VEVENT
UID:1c04bd64-ec18-42ea-a36a-dc67bd5ef3e3
DTSTAMP:20200812T123702Z
CREATED:20200729T195800Z
DESCRIPTION:Topic: A Glimpse into Horizon-Scale Physics Using Movies and Po
larization Maps\n\nSpeaker: Richard Anantua\, Center for Astrophysics | Ha
rvard & Smithsonian\, Institute for Theory and Computation\, Black Hole In
itiative\, Member-Event Horizon Telescope\n\nRecent radio observations of
emission from infalling and outflowing plasma in the vicinity of supermass
ive black holes is linked to simple phenomenological models via general re
lativistic magnetohydrodynamic simulations and related analytic models. Fo
r Sagittarius A* in our Galactic Center\, movies simulating hourly timesca
les show that these models aggregate into at least four morphological type
s: 1.) thin\, asymmetric photon ring\; 2.) coronal boundary layer with thi
n photon ring\; 3.) thick photon ring\; and 4.) extended outflow. For M87\
, further models are input into a jet simulation and compared with Very Lo
ng Baseline Array (43 GHz) observations. A self-similar\, stationary\, axi
symmetric model based on a force-free flow in the jet simulation is then u
sed to generate Stokes maps at Global mm-VLBI Array (86 GHz) and Event Hor
izon Telescope (230 GHz) scales. This model varies plasma content from ion
ic (e-p) to pair (e-e+). Emission at the observed frequency is assumed to
be synchrotron radiation from electrons and positrons\, whose pressure is
set to be constant fractions of the local magnetic pressure. The cleanest
observational signature in the Stokes maps is the vanishing of circular po
larization for increasing positron content.
DTSTART:20200804T150000Z
DTEND:20200804T160000Z
LAST-MODIFIED:20200729T195800Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University 2020 Summer Colloquium Series
URL:https://www.ias.edu/node/111826
END:VEVENT
BEGIN:VEVENT
UID:2fb35251-3e29-41f2-9e1f-5082b3db571e
DTSTAMP:20200812T123702Z
CREATED:20200724T122744Z
DESCRIPTION:Topic: Nonlinear Independent Component Analysis\n\nSpeaker: Aap
o Hyvärinen\, University of Helsinki\n\nUnsupervised learning\, in particu
lar learning general nonlinear representations\, is one of the deepest pro
blems in machine learning. Estimating latent quantities in a generative mo
del provides a principled framework\, and has been successfully used in th
e linear case\, e.g. with independent component analysis (ICA) and sparse
coding. However\, extending ICA to the nonlinear case has proven to be ext
remely difficult: A straight-forward extension is unidentifiable\, i.e. it
is not possible to recover those latent components that actually generate
d the data. Here\, we show that this problem can be solved by using additi
onal information either in the form of temporal structure or an additional
observed variable. We start by formulating two generative models in which
the data is an arbitrary but invertible nonlinear transformation of time
series (components) which are statistically independent of each other. Dra
wing from the theory of linear ICA\, we formulate two distinct classes of
temporal structure of the components which enable identification\, i.e. re
covery of the original independent components. We further generalize the f
ramework to the case where instead of temporal structure\, an additional '
auxiliary' variable is observed and used by means of conditioning (e.g. au
dio in addition to video). Our methods are closely related to 'self-superv
ised' methods heuristically proposed in computer vision\, and also provide
a theoretical foundation for such methods in terms of estimating a latent
-variable model. Likewise\, we show how variants of deep latent-variable m
odels such as VAE's can be seen as nonlinear ICA\, and made identifiable b
y suitable conditioning.
DTSTART:20200804T163000Z
DTEND:20200804T174500Z
LAST-MODIFIED:20200729T114814Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111801
END:VEVENT
BEGIN:VEVENT
UID:1dc5095b-a45d-441e-ac9e-e47ed4c27e05
DTSTAMP:20200812T123702Z
CREATED:20200724T123058Z
DESCRIPTION:Topic: A Blueprint of Standardized and Composable Machine Learn
ing\n\nSpeaker: Eric Xing\, Carnegie Mellon University\n\nIn handling wide
range of experiences ranging from data instances\, knowledge\, constraint
s\, to rewards\, adversaries\, and lifelong interplay in an ever-growing s
pectrum of tasks\, contemporary ML/AI research has resulted in thousands o
f models\, learning paradigms\, optimization algorithms\, not mentioning c
ountless approximation heuristics\, tuning tricks\, and black-box oracles\
, plus combinations of all above. While pushing the field forward rapidly\
, these results also make a comprehensive grasp of existing ML techniques
more and more difficult\, and make standardized\, reusable\, repeatable\,
reliable\, and explainable practice and further development of ML/AI produ
cts quite costly\, if possible\, at all. In this talk\, we present a simpl
e and systematic blueprint of ML\, from the aspects of losses\, optimizati
on solvers\, and model architectures\, that provides a unified mathematica
l formulation for learning with all experiences and tasks. The blueprint o
ffers a holistic understanding of the diverse ML algorithms\, guidance of
operationalizing ML for creating problem solutions in a composable and mec
hanic manner\, and unified framework for theoretical analysis.
DTSTART:20200806T190000Z
DTEND:20200806T203000Z
LAST-MODIFIED:20200731T111325Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111806
END:VEVENT
BEGIN:VEVENT
UID:47f14a76-afc8-41a0-805e-11a5daec388e
DTSTAMP:20200812T123702Z
CREATED:20200730T151702Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200807T190000Z
DTEND:20200807T200000Z
LAST-MODIFIED:20200730T151702Z
LOCATION:Remote Event
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/node/111856
END:VEVENT
BEGIN:VEVENT
UID:ea1c97e2-d0c0-4eb5-8fd8-837e12d7a1c0
DTSTAMP:20200812T123702Z
CREATED:20200709T210719Z
DESCRIPTION:Topic: Discovery and Origins of Giant Optical Nebulae Surroundi
ng PKS0454-22\n\nSpeaker: Discussion Leader Jakob Helton\, Princeton Unive
rsity\n\n
DTSTART:20200810T150000Z
DTEND:20200810T160000Z
LAST-MODIFIED:20200807T192030Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111596
END:VEVENT
BEGIN:VEVENT
UID:d7320b6d-9bd2-4283-b1c6-f42db75441f2
DTSTAMP:20200812T123702Z
CREATED:20200730T150331Z
DESCRIPTION:Topic: How to Test Statistical Models for the Architectures of
Inner Planetary Systems?\n\nSpeaker: Eric Ford\, Pennsylvania State Univer
sity\n\nOur research group has developed two toy models for the distributi
ons of architectures of inner planetary systems ([He\, Ford & Ragozzine (2
019)](https://ui.adsabs.harvard.edu/abs/2019MNRAS.490.4575H/abstract) and
He et al. (2020)). Both accurately reproduce many of the most important ob
servables for the population of planetary systems identified by Kepler. Ye
t\, there are substantial differences in their implications for planet for
mation\, particularly in regards to the degree of dynamical excitation and
implications for planets with periods >300d. While we argue that our most
recent model is more plausible on formation grounds\, the similarity of t
he two models' predictions for the primary Kepler observables demonstrates
the need to identify additional ways to test these (and future) models. I
will gives examples of possible future tests\, such as higher-order stati
stics based on Kepler data\, transit timing and transit duration variation
s\, radial velocity follow-up of stars with transiting planets\, and next-
generation Doppler planet surveys. I will invite the audience to engage in
a discussion of which avenues are most appealing for future observational
tests and model upgrades.
DTSTART:20200810T161500Z
DTEND:20200810T171500Z
LAST-MODIFIED:20200807T213414Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111836
END:VEVENT
BEGIN:VEVENT
UID:5b6696e8-9221-4eae-8234-4fe063c68b2e
DTSTAMP:20200812T123702Z
CREATED:20200803T202139Z
DESCRIPTION:Topic: Statistical Learning Theory for Modern Machine Learning
\n\nSpeaker: John Shawe-Taylor\, University College London\n\nProbably App
roximately Correct (PAC) learning has attempted to analyse the generalisat
ion of learning systems within the statistical learning framework. It has
been referred to as a ‘worst case’ analysis\, but the tools have been exte
nded to analyse cases where benign distributions mean we can still general
ise even if worst case bounds suggest we cannot. The talk will cover the P
AC-Bayes approach to analysing generalisation that is inspired by Bayesian
inference\, but leads to a different role for the prior and posterior dis
tributions. We will discuss its application to Support Vector Machines and
Deep Neural Networks\, including the use of distribution defined priors.
DTSTART:20200811T163000Z
DTEND:20200811T174500Z
LAST-MODIFIED:20200807T153019Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111866
END:VEVENT
BEGIN:VEVENT
UID:31bdaa87-6e73-45a5-9a95-13d9c2f5116b
DTSTAMP:20200812T123702Z
CREATED:20200803T202729Z
DESCRIPTION:Topic: Latent State Discovery in Reinforcement Learning\n\nSpea
ker: John Langford\, Microsoft Research\n\nThere are three core orthogonal
problems in reinforcement learning: (1) Crediting actions (2) generalizin
g across rich observations (3) Exploring to discover the information neces
sary for learning. Good solutions to pairs of these problems are fairly we
ll known at this point\, but solutions for all three are just now being di
scovered. I’ll discuss several such results and dive into details on a few
of them.
DTSTART:20200813T190000Z
DTEND:20200813T203000Z
LAST-MODIFIED:20200805T201939Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111881
END:VEVENT
BEGIN:VEVENT
UID:99a7fa14-b444-47cd-b9d2-a295fc299430
DTSTAMP:20200812T123702Z
CREATED:20200709T210737Z
DESCRIPTION:Speaker: Discussion Leader\n\n
DTSTART:20200817T150000Z
DTEND:20200817T160000Z
LAST-MODIFIED:20200709T210737Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111601
END:VEVENT
BEGIN:VEVENT
UID:f950e189-9615-482f-b0a4-e845feb60969
DTSTAMP:20200812T123702Z
CREATED:20200730T150350Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200817T161500Z
DTEND:20200817T171500Z
LAST-MODIFIED:20200730T150350Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111841
END:VEVENT
BEGIN:VEVENT
UID:20ee8140-cbfa-415a-aa21-bded6d860bf9
DTSTAMP:20200812T123702Z
CREATED:20200803T202352Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: Li Deng\, Citadel\n\n
DTSTART:20200818T163000Z
DTEND:20200818T174500Z
LAST-MODIFIED:20200803T202352Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111871
END:VEVENT
BEGIN:VEVENT
UID:005d86cf-9d40-4eaa-ad7d-6f69a2875339
DTSTAMP:20200812T123702Z
CREATED:20200803T202936Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: Jason Eisner\, Johns Hopkins
University\n\n
DTSTART:20200820T190000Z
DTEND:20200820T203000Z
LAST-MODIFIED:20200803T202936Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111886
END:VEVENT
BEGIN:VEVENT
UID:ba2a0db2-a393-4d0f-88f5-242669d61f4b
DTSTAMP:20200812T123702Z
CREATED:20200807T141239Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200821T190000Z
DTEND:20200821T200000Z
LAST-MODIFIED:20200807T141239Z
LOCATION:Remote Event
SUMMARY:Princeton University HSC Group Discussion
URL:https://www.ias.edu/node/111966
END:VEVENT
BEGIN:VEVENT
UID:b81a99f3-fa1c-45ae-a446-3a0f95f6a031
DTSTAMP:20200812T123702Z
CREATED:20200709T210753Z
DESCRIPTION:Speaker: Discussion Leader\n\n
DTSTART:20200824T150000Z
DTEND:20200824T160000Z
LAST-MODIFIED:20200709T210753Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111606
END:VEVENT
BEGIN:VEVENT
UID:ec86ea5c-7a47-4fd2-a84b-bd5b96413ef1
DTSTAMP:20200812T123702Z
CREATED:20200730T150445Z
DESCRIPTION:Topic: General Discussion\n\n
DTSTART:20200824T161500Z
DTEND:20200824T171500Z
LAST-MODIFIED:20200730T150445Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Exoplanet Discussion Group
URL:https://www.ias.edu/node/111846
END:VEVENT
BEGIN:VEVENT
UID:cc6077b0-07d8-4f80-9ec6-18d0aba732f0
DTSTAMP:20200812T123702Z
CREATED:20200803T202512Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: Piotr Indyk\, Massachusetts
Institute of Technology\n\n
DTSTART:20200825T163000Z
DTEND:20200825T174500Z
LAST-MODIFIED:20200803T202512Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111876
END:VEVENT
BEGIN:VEVENT
UID:b21d3b96-6a03-41bc-90ef-0c9de5d3f703
DTSTAMP:20200812T123702Z
CREATED:20200803T203049Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: Inderjit Dhillon\, Universit
y of Texas\, Austin\n\n
DTSTART:20200827T190000Z
DTEND:20200827T203000Z
LAST-MODIFIED:20200803T203049Z
LOCATION:Remote Access Only - see link below
SUMMARY:Seminar on Theoretical Machine Learning
URL:https://www.ias.edu/node/111891
END:VEVENT
BEGIN:VEVENT
UID:e28331cd-eedd-47ac-a536-7dbd4581d8c4
DTSTAMP:20200812T123702Z
CREATED:20200709T210812Z
DESCRIPTION:Speaker: Discussion Leader\n\n
DTSTART:20200831T150000Z
DTEND:20200831T160000Z
LAST-MODIFIED:20200709T210812Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University Galread [Galactic/Extragalactic Reading Group]
URL:https://www.ias.edu/node/111611
END:VEVENT
BEGIN:VEVENT
UID:834dd7e5-ee6a-4a26-931b-008ea30ba1bc
DTSTAMP:20200812T123702Z
CREATED:20180808T185302Z
DESCRIPTION:
DTSTART:20200901T161500Z
DTEND:20200901T180000Z
LAST-MODIFIED:20180808T185302Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89086
END:VEVENT
BEGIN:VEVENT
UID:de8c4953-00f0-40a1-9fe6-d680a7bf50c9
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20200908T161500Z
DTEND:20200908T180000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89011
END:VEVENT
BEGIN:VEVENT
UID:0d3041a0-e308-4b36-8d00-de46fc68a53b
DTSTAMP:20200812T123702Z
CREATED:20200708T174414Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20200910T150000Z
DTEND:20200910T160000Z
LAST-MODIFIED:20200708T174529Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111466
END:VEVENT
BEGIN:VEVENT
UID:4efb401a-1da7-4da4-98e6-e558af26a084
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20200915T161500Z
DTEND:20200915T180000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89016
END:VEVENT
BEGIN:VEVENT
UID:e774db2c-a791-48ef-a7d8-69f41194762d
DTSTAMP:20200812T123702Z
CREATED:20200708T174628Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20200917T150000Z
DTEND:20200917T160000Z
LAST-MODIFIED:20200708T174628Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111471
END:VEVENT
BEGIN:VEVENT
UID:ec2a0f53-144c-4241-ac59-29405b72b6b8
DTSTAMP:20200812T123702Z
CREATED:20200110T165145Z
DESCRIPTION:
DTSTART:20200921T130000Z
DTEND:20200921T130000Z
LAST-MODIFIED:20200110T165145Z
LOCATION:
SUMMARY:IAS School of Mathematics Term I Begins
URL:https://www.ias.edu/node/107721
END:VEVENT
BEGIN:VEVENT
UID:c3b73e08-c01e-4ab7-9ac1-405f026cce72
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20200922T161500Z
DTEND:20200922T180000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89021
END:VEVENT
BEGIN:VEVENT
UID:954b6dfd-7e01-4365-bf01-79775fbbf2c0
DTSTAMP:20200812T123702Z
CREATED:20200708T174720Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20200924T150000Z
DTEND:20200924T160000Z
LAST-MODIFIED:20200708T174720Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111476
END:VEVENT
BEGIN:VEVENT
UID:85c5769a-60e3-4548-899f-72e05ca9bd9e
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20200929T161500Z
DTEND:20200929T180000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89026
END:VEVENT
BEGIN:VEVENT
UID:bbf90b29-13ba-495b-8647-87a38e690b4b
DTSTAMP:20200812T123702Z
CREATED:20200708T174806Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20201001T150000Z
DTEND:20201001T160000Z
LAST-MODIFIED:20200708T174806Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111481
END:VEVENT
BEGIN:VEVENT
UID:89f6c624-f4cc-484e-8f82-0cc9dcec7a07
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20201006T161500Z
DTEND:20201006T180000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89031
END:VEVENT
BEGIN:VEVENT
UID:61ef6744-3737-4e9f-b133-aaee8895e108
DTSTAMP:20200812T123702Z
CREATED:20200806T225120Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201007T213000Z
DTEND:20201007T230000Z
LAST-MODIFIED:20200806T225219Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111906
END:VEVENT
BEGIN:VEVENT
UID:24463d6b-c854-4d71-848d-3234bc66388b
DTSTAMP:20200812T123702Z
CREATED:20200708T174840Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20201008T150000Z
DTEND:20201008T160000Z
LAST-MODIFIED:20200708T174840Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111486
END:VEVENT
BEGIN:VEVENT
UID:dac321ab-0889-4773-a45c-906b54746074
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20201013T161500Z
DTEND:20201013T180000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89036
END:VEVENT
BEGIN:VEVENT
UID:1c6d301a-0e5a-46f6-98fa-c999990fd39a
DTSTAMP:20200812T123702Z
CREATED:20200806T225404Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201014T213000Z
DTEND:20201014T230000Z
LAST-MODIFIED:20200806T225404Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111911
END:VEVENT
BEGIN:VEVENT
UID:b8624a3a-0d57-4b7d-9b25-71de3661c2c7
DTSTAMP:20200812T123702Z
CREATED:20200708T174911Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20201015T150000Z
DTEND:20201015T160000Z
LAST-MODIFIED:20200708T174911Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111491
END:VEVENT
BEGIN:VEVENT
UID:da1e1c10-df69-4e14-9875-7a485c734152
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20201020T161500Z
DTEND:20201020T180000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89041
END:VEVENT
BEGIN:VEVENT
UID:9a1ce998-adeb-440d-abb9-1fffe0b0675d
DTSTAMP:20200812T123702Z
CREATED:20200806T225427Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201021T213000Z
DTEND:20201021T230000Z
LAST-MODIFIED:20200806T225427Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111916
END:VEVENT
BEGIN:VEVENT
UID:61981931-ece3-4b76-bbdc-37f360dbb8ad
DTSTAMP:20200812T123702Z
CREATED:20200708T174933Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20201022T150000Z
DTEND:20201022T160000Z
LAST-MODIFIED:20200708T174933Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111496
END:VEVENT
BEGIN:VEVENT
UID:e325844c-dfb2-4379-9e0d-de2e541c6504
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20201027T161500Z
DTEND:20201027T180000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89046
END:VEVENT
BEGIN:VEVENT
UID:b55d2d21-ff4c-45b9-9540-ef1fdbba298b
DTSTAMP:20200812T123702Z
CREATED:20200806T225453Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201028T213000Z
DTEND:20201028T230000Z
LAST-MODIFIED:20200806T225453Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111921
END:VEVENT
BEGIN:VEVENT
UID:a947c998-55e4-4631-85ed-0dec6f864603
DTSTAMP:20200812T123702Z
CREATED:20200708T175003Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20201029T150000Z
DTEND:20201029T160000Z
LAST-MODIFIED:20200708T175003Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111501
END:VEVENT
BEGIN:VEVENT
UID:512a6d29-8aa4-4f04-8a0a-f09773b2fb43
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20201103T171500Z
DTEND:20201103T190000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89051
END:VEVENT
BEGIN:VEVENT
UID:e56bd9ba-368d-4e5a-998c-4a96c50cd100
DTSTAMP:20200812T123702Z
CREATED:20200806T231920Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201104T223000Z
DTEND:20201105T000000Z
LAST-MODIFIED:20200806T231920Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111926
END:VEVENT
BEGIN:VEVENT
UID:b3d754af-49a5-4cb9-9b46-3d1dddfbe62b
DTSTAMP:20200812T123702Z
CREATED:20200708T175040Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20201105T160000Z
DTEND:20201105T170000Z
LAST-MODIFIED:20200708T175040Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111506
END:VEVENT
BEGIN:VEVENT
UID:db54d26a-9e99-4b85-b773-ef61846d40e0
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20201110T171500Z
DTEND:20201110T190000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89056
END:VEVENT
BEGIN:VEVENT
UID:379c3ddc-ea17-477d-9f98-338590942481
DTSTAMP:20200812T123702Z
CREATED:20200806T231946Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201111T223000Z
DTEND:20201112T000000Z
LAST-MODIFIED:20200806T231946Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111931
END:VEVENT
BEGIN:VEVENT
UID:6737f66c-dba9-473e-9566-975c8dde1435
DTSTAMP:20200812T123702Z
CREATED:20200708T175101Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20201112T160000Z
DTEND:20201112T170000Z
LAST-MODIFIED:20200708T175101Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111511
END:VEVENT
BEGIN:VEVENT
UID:9dccba98-95c1-4937-b070-2cc9c8bbc47a
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20201117T171500Z
DTEND:20201117T190000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89061
END:VEVENT
BEGIN:VEVENT
UID:3486eee5-da39-4690-b540-56aa868cc9ef
DTSTAMP:20200812T123702Z
CREATED:20200806T232026Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201118T223000Z
DTEND:20201119T000000Z
LAST-MODIFIED:20200806T232026Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111936
END:VEVENT
BEGIN:VEVENT
UID:e61b50de-db71-4c8f-809c-22777a3f171a
DTSTAMP:20200812T123702Z
CREATED:20200708T175130Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20201119T160000Z
DTEND:20201119T170000Z
LAST-MODIFIED:20200708T175130Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111516
END:VEVENT
BEGIN:VEVENT
UID:a2a7c23f-241c-4190-8f2e-524e5d275c10
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20201124T171500Z
DTEND:20201124T190000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89066
END:VEVENT
BEGIN:VEVENT
UID:5498904f-c31e-4fb6-ad4c-148d45838b67
DTSTAMP:20200812T123702Z
CREATED:20200806T232058Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201125T223000Z
DTEND:20201126T000000Z
LAST-MODIFIED:20200806T232058Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111941
END:VEVENT
BEGIN:VEVENT
UID:c87ee0c4-619e-49e1-9ff6-31b83952d833
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20201201T171500Z
DTEND:20201201T190000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89071
END:VEVENT
BEGIN:VEVENT
UID:77a86d8e-2c22-44af-9c20-37907c7cf1ea
DTSTAMP:20200812T123702Z
CREATED:20200806T232132Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201202T223000Z
DTEND:20201203T000000Z
LAST-MODIFIED:20200806T232132Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111946
END:VEVENT
BEGIN:VEVENT
UID:2745b32e-12ed-4687-b16b-4d1080d191f8
DTSTAMP:20200812T123702Z
CREATED:20200708T175157Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20201203T160000Z
DTEND:20201203T170000Z
LAST-MODIFIED:20200708T175157Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111521
END:VEVENT
BEGIN:VEVENT
UID:73acd612-5424-41c7-a8b5-48d5bb5d230b
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20201208T171500Z
DTEND:20201208T190000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89076
END:VEVENT
BEGIN:VEVENT
UID:dd4fe05e-be02-49fe-87bb-8739f3be9d36
DTSTAMP:20200812T123702Z
CREATED:20200806T232156Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201209T223000Z
DTEND:20201210T000000Z
LAST-MODIFIED:20200806T232156Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111951
END:VEVENT
BEGIN:VEVENT
UID:5cff77e2-0cd6-466a-9b7e-0e044072bb33
DTSTAMP:20200812T123702Z
CREATED:20200708T175225Z
DESCRIPTION:Topic: TBA\n\n
DTSTART:20201210T160000Z
DTEND:20201210T170000Z
LAST-MODIFIED:20200708T175225Z
LOCATION:Virtual Meeting
SUMMARY:Institute for Advanced Study Astrophysics Seminar
URL:https://www.ias.edu/node/111526
END:VEVENT
BEGIN:VEVENT
UID:6bf1ce74-8c33-47e8-82ed-e01be5888f09
DTSTAMP:20200812T123702Z
CREATED:20180808T185024Z
DESCRIPTION:
DTSTART:20201215T171500Z
DTEND:20201215T190000Z
LAST-MODIFIED:20180808T185024Z
LOCATION:Dilworth Room
SUMMARY:Institute for Advanced Study / Princeton University Bahcall Lunch
URL:https://www.ias.edu/node/89081
END:VEVENT
BEGIN:VEVENT
UID:93783e67-2c74-4b45-bcd1-86a5daa9e140
DTSTAMP:20200812T123702Z
CREATED:20200806T232220Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201216T223000Z
DTEND:20201217T000000Z
LAST-MODIFIED:20200806T232220Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111956
END:VEVENT
BEGIN:VEVENT
UID:afba2a30-97b1-4402-95d8-29026b677b69
DTSTAMP:20200812T123702Z
CREATED:20200110T165522Z
DESCRIPTION:
DTSTART:20201218T230000Z
DTEND:20201218T230000Z
LAST-MODIFIED:20200110T165522Z
LOCATION:
SUMMARY:IAS School of Mathematics Term I Ends
URL:https://www.ias.edu/node/107731
END:VEVENT
BEGIN:VEVENT
UID:136938d0-40c9-455c-aefb-ba70ad17babc
DTSTAMP:20200812T123702Z
CREATED:20200806T232258Z
DESCRIPTION:Topic: To Be Announced\n\nSpeaker: To Be Announced\n\n
DTSTART:20201223T223000Z
DTEND:20201224T000000Z
LAST-MODIFIED:20200806T232258Z
LOCATION:Remote Access Only
SUMMARY:Mathematical Conversations
URL:https://www.ias.edu/node/111961
END:VEVENT
BEGIN:VEVENT
UID:d99563f1-f7c3-4c73-8709-7ba2d04f71e2
DTSTAMP:20200812T123702Z
CREATED:20200110T165737Z
DESCRIPTION:
DTSTART:20210111T140000Z
DTEND:20210111T140000Z
LAST-MODIFIED:20200110T165737Z
LOCATION:
SUMMARY:IAS School of Mathematics Term II Begins
URL:https://www.ias.edu/node/107736
END:VEVENT
BEGIN:VEVENT
UID:b463ab03-9ba3-4166-bd46-c0900ad2867b
DTSTAMP:20200812T123702Z
CREATED:20200110T165817Z
DESCRIPTION:
DTSTART:20210409T220000Z
DTEND:20210409T220000Z
LAST-MODIFIED:20200110T165817Z
LOCATION:
SUMMARY:IAS School of Mathematics Term II Ends
URL:https://www.ias.edu/node/107741
END:VEVENT
END:VCALENDAR