Previous Conferences & Workshops

Dec
07
2016

Mathematical Conversations

Negative correlation and Hodge-Riemann relations
6:00pm|Dilworth Room

All finite graphs satisfy the two properties mentioned in the title. I will explain what I mean by this, and speculate on generalizations and interconnections.

Dec
07
2016

Working Seminar on Representation Theory

Mirror symmetry on the Bruhat-Tits building and representations of $p$-adic groups
11:00am|S-101

It is an old question in representation theory whether any finitely-generated smooth representation of a $p$-adic group has a resolution by representations induced from (finite-dimensional representations of) compact subgroups. We construct such a...

Dec
06
2016

Joint IAS/Princeton University Symplectic Geometry Seminar

Contact manifolds with flexible fillings
Oleg Lazarev
3:00pm|Fine 224, Princeton University

In this talk, I will prove that all flexible Weinstein fillings of a given contact manifold have isomorphic integral cohomology. As an application, I will show that in dimension at least 5 any almost contact class that has an almost Weinstein...

Dec
06
2016

Computer Science/Discrete Mathematics Seminar II

Approximate constraint satisfaction requires sub-exponential size linear programs
10:30am|S-101

We show that for constraint satisfaction problems (CSPs), sub-exponential size linear programming relaxations are as powerful as $n^{\Omega(1)}$-rounds of the Sherali-Adams linear programming hierarchy. As a corollary, we obtain sub-exponential size...

Dec
05
2016

Members’ Seminar

Types and their applications
1:15pm|S-101

Representations of open compact subgroups play a fundamental role in studying representations of $p$-adic groups and their covering groups. We give an overview of this subject, called the theory of types, in connection with harmonic analysis. We...

Dec
05
2016

Computer Science/Discrete Mathematics Seminar I

On the number of ordinary lines determined by sets in complex space
11:15am|S-101

Consider a set of $n$ points in $\mathbb R^d$. The classical theorem of Sylvester-Gallai says that, if the points are not all collinear then there must be a line through exactly two of the points. Let us call such a line an "ordinary line". In a...

Dec
02
2016

Mathematical Conversations

Revisiting isoperimetric inequalities for Lagrangians
6:30pm|Dilworth Room

Isoperimetric problems are ubiquitous in mathematics. We shall discuss some proved and some conjectural ones in symplectic geometry, together with applications to other areas of mathematics.