Previous Conferences & Workshops

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...

Jan
27
2021

Stability and Testability

Stability of amenable groups via ergodic theory
Arie Levit
11:00am|Remote Access
I will describe how basic ergodic theory can be used to prove that certain amenable groups are stable. I will demonstrate our method by showing that lamplighter groups are stable. Another uncountably infinite family to which our method applies are...
Jan
26
2021

SL2 Seminar

Why do we care about characters of tilting modules?
Shotaro Makisumi
3:00pm|Remote Access

I will explain the basics of tilting modules for reductive algebraic groups and why we should care about their characters. In particular, I will discuss Donkin's tensor product theorem and the relation to modular representations of symmetric groups...