Previous Conferences & Workshops

Feb
23
2022

Topics in Geometry

Quantitative Heegaard Floer cohomology and the Calabi invariant [CGHMSS] Part III: Background on Heegaard-Floer
Ipsita Datta
2:00pm|Simonyi Hall 101 and Remote Access
Feb
23
2022

Arithmetic Groups

Effective equidistribution of some one-parameter unipotent flows with polynomial rates I & II
Elon Lindenstrauss
11:00am|Simonyi 101 and Remote Access

A landmark result of Ratner states that if $G$ is a Lie group, $\Gamma$ a lattice in $G$ and if $u_t$ is a one-parameter $Ad$-unipotent subgroup of $G$, then for any $x \in G/\Gamma$ the orbit $u_t.x$ is equidistributed in a periodic orbit of some...

Feb
22
2022

Seminar in Analysis and Geometry

On the Lagrangian cobordism relation on Legendrian links
Joshua Sabloff
2:00pm|Simonyi Hall 101 and Remote Access

Lagrangian cobordism induces a preorder on the set of Legendrian links in any contact 3-manifold. We show that any finite collection of null-homologous Legendrian links in a tight contact 3-manifold with a common rotation number has an upper bound...

Feb
22
2022

Computer Science/Discrete Mathematics Seminar II

Derandomization and its connections throughout complexity theory
Liije Chen
10:30am|Simonyi Hall 101 and Remote Access

This is the second talk in a three-part series presented together with Roei Tell.

The series is intended to survey the fast-paced recent developments in the study of derandomization. We will present:

  1. A revised version of the classical hardness...
Feb
21
2022

Joint IAS/Princeton University Symplectic Geometry Seminar

Generic equidistribution of periodic orbits for area-preserving surface diffeomorphisms.
Rohil Prasad
4:00pm|Princeton University, Fine 314

I will discuss some recent work showing that a generic area-preserving diffeomorphism of a closed surface has an equidistributed sequence of periodic orbits. The proof uses several properties of spectral invariants from periodic Floer homology...

Feb
21
2022

Computer Science/Discrete Mathematics Seminar I

PAC Learnability of partial concept classes
Noga Alon
11:15am|Simonyi 101 and Remote Access

We extend the classical theory of PAC learning in a way which allows to model a rich variety of practical learning tasks where the data satisfies special properties that ease the learning process. This is done by considering partial concepts...

Feb
18
2022

Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoominar

Reynaud models from relative Floer theory
Umut Varolgunes
9:15am|Remote Access

I will start by explaining the construction of a formal scheme starting with an integral affine manifold $Q$ equipped with a decomposition into Delzant polytopes. This is a weaker and more elementary version of degenerations of abelian varieties...

Feb
17
2022

Joint IAS/Princeton University Number Theory Seminar

A Wiles-Diamond numerical criterion in higher dimensions
Chandrashekhar Khare
4:30pm

Wiles’s proof of the modularity of (semistable) elliptic curves over the rationals and Fermat’s Last Theorem relied on his invention of a modularity lifting method. There were two strands to the method:

(i) A numerical criterion to for a map of...