Previous Conferences & Workshops

Nov
17
2020

SL2 Seminar

No seminar: workshop
3:00pm|Remote Access
Nov
17
2020

Virtual Workshop on Recent Developments in Geometric Representation Theory

Path isomorphisms between quiver Hecke and diagrammatic Bott-Samelson endomorphism algebras
Amit Hazi
11:00am|Wolfensohn Hall and Remote Access

We construct an explicit isomorphism between certain truncations of quiver Hecke algebras and Elias-Williamson's diagrammatic endomorphism algebras of Bott-Samelson bimodules. As a corollary, we deduce that the decomposition numbers of these...

Nov
17
2020

Computer Science/Discrete Mathematics Seminar II

Factorization through L2, Rounding and Duality
Vijay Bhattiprolu
10:30am|Simonyi Hall 101 and Remote Access - see Zoom link below

Let X and Y be normed spaces. In functional analysis, a ``theorem on factorization through L2'' refers to the following type of statement: 

Every bounded linear operator A mapping X to Y (i.e. sup_x ||A(x)||_Y/||x||_X infinity), can be written as...

Nov
17
2020

Virtual Workshop on Recent Developments in Geometric Representation Theory

The Picard group of the stable module category of a finite group
Jesper Grodal
9:30am|Wolfensohn Hall and Remote Access

The Picard group of the stable module category of a finite group plays a role in many parts of modular representation theory. It was calculated when the group is an abelian $p$-group, by pioneering work of Dade in the 1970's, and a classification...

Nov
17
2020

Virtual Workshop on Recent Developments in Geometric Representation Theory

Coherent categorification of quantum loop sl(2)
Peng Shan
8:00am|Wolfensohn Hall and Remote Access

We explain an equivalence of categories between a module category of quiver Hecke algebras associated with the Kronecker quiver and a category of equivariant perverse coherent sheaves on the nilpotent cone of type A. This provides a link between two...

Nov
16
2020

Analysis Seminar

On Hölder continuous globally dissipative Euler flows
Hyunju Kwon
4:30pm|Simonyi Hall 101 and Remote Access

In the theory of turbulence, a famous conjecture of Onsager asserts that the threshold Hölder regularity for the total kinetic energy conservation of (spatially periodic) Euler flows is 1/3. In particular, there are Hölder continuous Euler flows...

Nov
16
2020

Virtual Workshop on Recent Developments in Geometric Representation Theory

The integral coefficient geometric Satake equivalence in mixed characteristic
Jize Yu
4:30pm|Wolfensohn Hall and Remote Access

The geometric Satake equivalence establishes a link between two categories: the category of spherical perverse sheaves on the affine Grassmannian and the category of representations of the Langlands dual group. It has found many important...

Nov
16
2020

Virtual Workshop on Recent Developments in Geometric Representation Theory

Modular Perverse Sheaves on the affine Flag Variety
Laura Rider
3:00pm|Wolfensohn Hall and Remote Access

There are two categorical realizations of the affine Hecke algebra: constructible sheaves on the affine flag variety and coherent sheaves on the Langlands dual Steinberg variety. A fundamental problem in geometric representation theory is to relate...