Previous Conferences & Workshops

Feb
01
2021

Computer Science/Discrete Mathematics Seminar I

Graph Density Inequalities, Sums of Squares and Tropicalization
Annie Raymond
11:15am|Remote Access - see Zoom link below

Establishing inequalities among graph densities is a central pursuit in extremal graph theory. One way to certify the nonnegativity of a graph density expression is to write it as a sum of squares or as a rational sum of squares. In this talk, we...

Jan
29
2021

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

Three 20 minute research talks
Alexandre Jannaud, Tim Large and Oliver Edtmair
9:15am|Remote Access

Alexandre Jannaud (Sorbonne),Dehn-Seidel twist, $C^0$ symplectic geometry and barcodes
Abstract: In this talk I will present my work initiating the study of the $C^0$ symplectic mapping class group, i.e. the group of isotopy classes of symplectic...

Jan
28
2021

Quantum Groups Seminar

Introduction to quantized enveloping algebras
Leonardo Maltoni
4:00pm|Remote Access

Continuation of the talk from last time.

Jan
27
2021

Mathematical Conversations

Möbius Disjointness
Peter Sarnak
5:30pm|Remote Access

The Möbius function $\mu(n)$ measures the parity of number of prime factors of $n$ (if $n$ is square free). Understanding the randomness in this function (often referred to as the Möbius randomness principle) is a fundamental and very difficult...

Jan
27
2021

Geometric and Modular Representation Theory Seminar

The Hecke category action on the principal block via Smith theory
Geordie Williamson
3:00pm|Simonyi Hall 101 and Remote Access

Wall-crossing functors on the principal block of category $O$ give an action of the (finite) Hecke category. If one knows enough about the Hecke category, one can deduce the Kazhdan-Lusztig conjectures from the existence of this action. This is a...