Previous Conferences & Workshops

Feb
16
2021

Computer Science/Discrete Mathematics Seminar II

High dimensional expanders - Part 2
Shai Evra
10:30am|Remote Access - see Zoom link below

Expander graphs are graphs which simultaneously are both sparse and highly connected. The theory of expander graphs received a lot of attention in the past half a century, from both computer science and mathematics. In recent years, a new theory of...

Feb
15
2021

Members’ Seminar

No seminar: Presidents' Day
2:00pm|Simonyi Hall 101 and Remote Access
Feb
15
2021

Computer Science/Discrete Mathematics Seminar I

Monotone Arithmetic Circuit Lower Bounds Via Communication Complexity
Arkadev Chattopadhyay
11:15am|Remote Access - see Zoom link below

Valiant (1980) showed that general arithmetic circuits with negation can be exponentially more powerful than monotone ones. We give the first qualitative improvement to this classical result: we construct a family of polynomials P-n in n variables...

Feb
11
2021

Joint IAS/Princeton University Number Theory Seminar

Cohomology of Arithmetic Groups and Endoscopy
Mathilde Gerbelli-Gauthier
4:30pm|Remote Access

How fast do Betti numbers grow in a congruence tower of compact arithmetic manifolds? The dimension of the middle degree of cohomology is proportional to the volume of the manifold, but away from the middle the growth is known to be sub-linear in...

Feb
11
2021

Quantum Groups Seminar

Center of quantum group
Arun Kannan
4:00pm|Remote Access

Continuation of the talk from Feb 4.

Feb
10
2021

Mathematical Conversations

Quantum Integer Valued Polynomials
Nate Harman
5:30pm|Remote Access

In algebraic combinatorics there well known objects called q-integers, q-binomial coefficients, and q-factorials which for lack of a better word "q-ify" the usual integers, binomial coefficients, and factorials. I will explain these notions (and say...