Previous Conferences & Workshops

Mar
18
2021

Quantum Groups Seminar

Algebraic groups and all in characteristic p
Ivan Loseu
4:00pm|Remote Access

The talk discusses basics of quantum groups at roots of unity with motivation from modular representation theory.

Mar
17
2021

Mathematical Conversations

Embedded Contact Homology of Prequantization Bundles
Jo Nelson
5:30pm|Remote Access

Embedded Contact Homology (ECH) is a Floer type invariant due to Hutchings. This talk provides a gentle overview of ECH (in part through a video of the Hopf fibration) and sketches why ECH of a prequantization bundle over a Riemann surface is...

Mar
17
2021

Geometric and Modular Representation Theory Seminar

Affine Hecke category and noncommutative Springer resolution
Roman Bezrukavnikov
3:00pm|Simonyi Hall 101 and Remote Access

I will start with a few comments on the proof of the equivalence presented in the previous talks. Then I will focus on the description of the abelian category of perverse sheaves on the affine flag variety on the coherent side, where the answer is...

Mar
17
2021

Stability and Testability

Approximate representations of symplectomorphisms via quantization
Leonid Polterovich
11:00am|Remote Access
We argue that quantization, a mathematical model of the quantum classical correspondence, gives rise to approximate unitary representations of symplectomorphism groups. As an application, we get an obstruction to symplectic action of Lubotzky...
Mar
16
2021

SL2 Seminar

Microlocal sheaves II: morphisms, microperverse sheaves and regular singularities
Michael McBreen
6:00pm|Remote Access

We introduce basic tools of the trade: the Fourier-Sato transform, specialisation, Sato's microlocalisation and the microhom functor, culminating with a concrete description of the morphisms in our category of microlocal sheaves. We use quantized...

Mar
16
2021

Computer Science/Discrete Mathematics Seminar II

Polynomial systems and mixed volumes
Ricky I Liu
10:30am|Simonyi Hall 101 and Remote Access - see Zoom link below

Bernstein's theorem (also known as the Bernstein-Khovanskii-Kushnirenko theorem) gives a bound on the number of nonzero solutions of a polynomial system of equations in terms of the mixed volume of its Newton polytopes. In this talk, we will give...

Mar
15
2021

Analysis Seminar

The dissipation properties of transport noise
Franco Flandoli
4:30pm|Remote Access

In 2017 Lucio Galeati understood that a suitable scaling limit of certain hyperbolic PDEs with noise may lead to deterministic parabolic equations. Since then, in collaboration with Lucio and Dejun Luo, we have understood the phenomenon from several...

Mar
15
2021

Members’ Seminar

Estimating the mean of a real valued distribution
Paul Valiant
2:00pm|Simonyi Hall 101 and Remote Access

I revisit the basic statistical problem of estimating the mean of a real-valued distribution. I will introduce an estimator with the guarantee that "our estimator, on *any* distribution, is as accurate as the sample mean is for the Gaussian...