Previous Conferences & Workshops

Mar
10
2021

Mathematical Conversations

Many interacting quantum particles: open problems, and a new point of view on an old problem
Ian Jauslin
5:30pm|Remote Access

The main object of interest in this talk will be a system of many particles, modeled using the prescriptions of quantum mechanics. A significant challenge to studying such systems is that particles interact with each other, via weak or strong...

Mar
10
2021

Geometric and Modular Representation Theory Seminar

Two Geometric Realizations of the Affine Hecke Algebra I
Pablo Boixeda Alvarez
3:00pm|Simonyi Hall 101 and Remote Access

In this talk we will begin the discussion of the results in Bezrukavnikov's "On Two Geometric Realizations of the Affine Hecke algebra". We will put all the previous tools described in this series of talks together to construct the equivalence of...

Mar
10
2021

Stability and Testability

Constraint metric approximation and constraint stability
Liviu Paunescu
11:00am|Remote Access
Constraint metric approximation is about constructing an approximation of a group $G$, when the approximation is already given for a subgroup $H$. Similarly, constraint stability is about lifting a representation of a group $G$, when the lift is...
Mar
09
2021

SL2 Seminar

A friendly introduction to microlocal sheaves
Michael McBreen
5:00pm|Remote Access

We will study the singularities of sheaves on a manifold via the symplectic geometry of its cotangent bundle, following the work of Sato, Kashiwara, Schapira and others. We will then see how to organise this information into a sheaf of categories...

Mar
09
2021

Computer Science/Discrete Mathematics Seminar II

Random k-out subgraphs
Or Zamir
10:30am|Simonyi Hall 101 and Remote Access - see Zoom link below

Random sampling a subgraph of a graph is an important algorithmic technique.  Solving some problems on the (smaller) subgraph is naturally faster, and can give either a useful approximate answer, or sometimes even give a result that can be quickly...

Mar
08
2021

Members’ Seminar

Higher Representation Theory
Raphaël Rouquier
2:00pm|Simonyi Hall 101 and Remote Access

New types of symmetries have been considered in algebra and algebraic geometry and a higher analog of representation theory has been developed to answer questions of classical representation theory. Geometric representation theory can be viewed as...

Mar
08
2021

Computer Science/Discrete Mathematics Seminar I

Strong refutation of semi-random Boolean CSPs
Venkatesan Guruswami
11:15am|Remote Access - see Zoom link below

For a fixed integer k > 1, the Boolean k-XOR problem consists of a system of linear equations mod 2 with each equation involving exactly k variables. We give an algorithm to strongly refute *semi-random* instances of the Boolean k-XOR problem on n...