Previous Conferences & Workshops

Feb
09
2009

Computer Science/Discrete Mathematics Seminar I

On P vs NP, Geometric Complexity Theory, and the Riemann Hypothesis
Ketan Mulmuley
11:15am|S-101

This series of three talks will give a nontechnical, high level overview of geometric complexity theory (GCT), which is an approach to the P vs. NP problem via algebraic geometry, representation theory, and the theory of a new class of quantum...

Feb
05
2009

Joint IAS/Princeton University Number Theory Seminar

On the Andre-Oort Conjecture
4:30pm|Fine Hall -- 214

Let S be a Shimura variety and L a set of special points on S. Andre and Oort conjecture that any irreducible component of the Zariski-closure of L is a subvariety of Hodge type of S. I will indicate a proof of this conjecture under GRH (this is...

Feb
04
2009

Workshop on Topology: Identifying Order in Complex Systems

Homology and Data Samples
Shmuel Weinberger
2:00pm|S-101

In this talk, I will try to explain some of the interest in the question of the computation of the homology of a space from noisy data samples as it relates to clustering and other natural problems. Moreover, I will also try to indicate some...

Feb
04
2009

Mathematical Physics Seminar

A Statistical Mechanics Model of Random Matrices
Tom Spencer
11:15am|S-101

Spectral prosperities of random matrices can be described in terms of correlations of a statistical mechanics model with hyperbolic symmetry. This talk will describe and analyze a simpler version of this model which is closely related to random walk...

Feb
03
2009

Geometric PDE Seminar

Dispersion and Strichartz Type Estimates With No Loss for Schrodinger Equation in Trapping Geometries
3:30pm|S-101

I shall explain how to obtain Strichartz estimates with no loss for Schrodinger equation in some cases where the geodesic flow has some trapped trajectories, but the flow is hyperbolic. (This is joint work with Burq and Hassell.)

Feb
03
2009

Geometric PDE Seminar

Scalar Invariants for Even Dimensional Conformal Structures
2:00pm|S-101

The first aim of Fefferman-Graham ambient metric construction was to write down all scalar invariants of conformal structures. For odd dimensions, the aim was achieved with the aid of the parabolic invariant theory by Bailey, Eastwood and Graham. In...

Feb
03
2009

Computer Science/Discrete Mathematics Seminar II

Poly-logarithmic Independence Fools ACO Circuits
10:30am|S-101

We will describe the recent proof of the 1990 Linial-Nisan conjecture. The conjecture states that bounded-depth boolean circuits cannot distinguish poly-logarithmically independent distributions from the uniform one. The talk will be almost...

Feb
02
2009

Members’ Seminar

Pseudo-Hermitian Geometry in 3-D
2:00pm|S-101

A pseudo-hermitian structure in 3-D is a contact form and an almost complex structure on the kernel of the contact form. There is a natural notion of area and mean curvature for a surface in such a geometry. I will discuss some work on the structure...