Previous Conferences & Workshops

Nov
13
2020

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

Quantum cohomology as a deformation of symplectic cohomology
Nicolas Sheridan
9:15am|Remote Access

Let X be a compact symplectic manifold, and D a normal crossings symplectic divisor in X. We give a criterion under which the quantum cohomology of X is the cohomology of a natural deformation of the symplectic cochain complex of X \ D. The...

Nov
12
2020

Joint IAS/Princeton University Number Theory Seminar

Effective height bounds for odd-degree totally real points on some curves
Levent Alpoge
4:30pm|Remote Access

Let \o be an order in a totally real field, say F. Let K be an odd-degree totally real field. Let S be a finite set of places of K. We study S-integral K-points on integral models H_\o of Hilbert modular varieties because not only do said varieties...

Nov
11
2020

Mathematical Conversations

Deep learning for the working mathematician
5:30pm|Remote Access

Artificial intelligence or "deep learning" is becoming ubiquitous in new fields of mathematical applications stemming from the internet economy. This has led to the creation of powerful new tools. We would like to explore how these techniques can be...

Nov
11
2020

Geometric and Modular Representation Theory Seminar

Iwahori-Whittaker category and geometric Casselman-Shalika
3:00pm|Simonyi Hall 101 and Remote Access

This talk will be an exposition of a recent paper of Bezrukavnikov-Gaitsgory-Mirkovic-Riche-Rider giving an Iwahori-Whittaker model for the Satake category. The main point is that their argument works for modular coefficients. I will give some...

Nov
11
2020

Stability and Testability

Flexible stability and nonsoficity
Peter Burton
11:00am|Remote Access

A sofic approximation to a countable discrete group is a sequence of finite models for the group that generalizes the concept of a Folner sequence witnessing amenability of a group and the concept of a sequence of quotients witnessing residual...

Nov
10
2020

SL2 Seminar

Blocks and Defect Groups of SLn
3:00pm|Remote Access

The modular representation theory of a finite group naturally breaks into different pieces called blocks, and the defect of a block is a sort of measure of its complexity. I will recall some basic aspects of this theory, and then give the complete...

Nov
10
2020

Computer Science/Discrete Mathematics Seminar II

Modular zeros in the character table of the symmetric group
10:30am|Remote Access Only - see link below

Miller computed the character table of $S_n$ for some fairly large n's and noticed that almost all of the entries were even. Based on this, he conjectured that the proportion of even entries in the character table of $S_n$ tends to $1$ as $n\to...

Nov
09
2020

Analysis Seminar

Transverse Measures and Best Lipschitz and Least Gradient Maps
4:30pm|Simonyi Hall 101 and Remote Access

Motivated by some work of Thurston on defining a Teichmuller theory based on best Lipschitz maps between surfaces, we study infinity-harmonic maps from a manifold to a circle. The best Lipschitz constant is taken on on a geodesic lamination...