Previous Conferences & Workshops

Mar
30
2021

Workshop on Representation Theory and Geometry

Flag manifolds over semifields I
10:30am|Virtual

The study of totally positive matrices, i.e., matrices with positive minors, dates back to 1930s. The theory was generalised by Lusztig to arbitrary split reductive groups using canonical bases, and has significant impacts on the theory of cluster...

Mar
30
2021

Computer Science/Discrete Mathematics Seminar II

Computational - Statistical gaps and the Group Testing problem
10:30am|Remote Access - see Zoom link below

In a plethora of random models for constraint satisfaction and statistical inference problems, researchers from different communities have observed computational gaps between what existential or brute-force methods promise, and what known efficient...

Mar
30
2021

Workshop on Representation Theory and Geometry

From Weyl modules to simple modules in many small steps
9:00am|Virtual

Let G be a semisimple group over an algebraically closed field of large characteristic. There are two important types of rational representations of G: the Weyl modules and the simple modules. We will explain how to go from the first type to the...

Mar
29
2021

Workshop on Representation Theory and Geometry

Modular perverse sheaves on symplectic singularities
5:00pm|Virtual

A symplectic singularity has a natural stratification by Poisson leaves, which are symplectic, hence even-dimensional.  Perverse sheaves constructible with respect to this stratification are semisimple if the coefficients are in characteristic zero...

Mar
29
2021

Analysis Seminar

Mean-Field limits for Coulomb-type dynamics
Sylvia Serfaty
4:30pm|Remote Access

We consider a system of $N$ particles evolving according to the gradient flow of their Coulomb or Riesz interaction, or a similar conservative flow, and possible added random diffusion. By Riesz interaction, we mean inverse power $s$ of the distance...

Mar
29
2021

Workshop on Representation Theory and Geometry

Smith theory and Langlands functoriality
3:30pm|Virtual

According to Langlands’ conjectures, algebraic automorphic forms should be parametrized by global Galois representations, and smooth representations of $p$-adic groups should be parametrized by local Galois representations. These parametrizations...

Mar
29
2021

Workshop on Representation Theory and Geometry

Towards canonical bases in homology of symplectic resolutions
2:00pm|Virtual

I will describe a program aimed at understanding numerics of representations of quantized symplectic resolutions in positive characteristic. A key ingredient is a generalization of the action of the affine braid group on the derived category of...

Mar
29
2021

Workshop on Representation Theory and Geometry

2:00pm|Virtual Event via Zoom
Organizers:

The workshop was organized by Geordie Williamson(IAS/University of Sydney) and took place virtually.

Geometric representation theory has proved itself to be an unreasonably effective tool in pure mathematics. This conference (the...

Mar
29
2021

Computer Science/Discrete Mathematics Seminar I

Approximating Max Cut with Subexponential Linear Programs
Tselil Schramm
11:15am|Remote Access - see Zoom link below

In the max cut problem, we are given an n-vertex graph and we are asked what is the maximum fraction of edges "cut" by any partition of the vertices? This problem can be reformulated as an optimization problem over the cut polytope, which has...