Previous Conferences & Workshops

Feb
20
2009

Mathematical Physics Seminar

Non-Spectral Poles in Asymptotically Hyperbolic Scattering
Robin Graham
4:00pm|S-101

This talk will discuss non-spectral poles of the scattering operator arising in problems with regular singular point behavior at infinity. The phenomenon will be exhibited in a one-dimensional model example involving the Yukawa potential on a half...

Feb
19
2009

Joint IAS/Princeton University Number Theory Seminar

Potential Automorphy for Certain Galois Representations to GL(n)
Thomas Barnet-Lamb
4:30pm|Fine Hall -- 214

I will describe recent generalizations of mine to a theorem of Harris, Shepherd-Barron, and Taylor, showing that have certain Galois representations become automorphic after one makes a suitably large totally-real extension to the base field. The...

Feb
19
2009

Mini-Course in Geometric PDE

Curvature and Regularity of Optimal Transport
2:00pm|S-101

In 2005 Ma, Trudinger and Wang introduced a fourth-order differential condition which comes close to be necessary and sufficient for the smoothness of solutions to optimal transport problems with a given cost function. If the cost function is the...

Feb
18
2009

Combined Members’ Seminar and Mathematical Physics Seminar

Generalizations to Boltzmann-Maxwell Interaction Dynamics
11:15am|S-101

We shall revisit the Boltzmann equation for rarefied non-linear particle dynamics, of conservative or dissipative nature, and on the stochastic N-particle model, introduced by M. Kac [19]. Related to this equation, we consider a a probabilistic...

Feb
17
2009

Geometric PDE Seminar

Characterizations of Sobolev Spaces and Related Inequalities
3:30pm|S-101

In this talk, I will discuss some characterizations of Sobolev spaces, BV spaces, and present some new inequalities in this context. As a consequence, I can improve classical properties of Sobolev spaces such as Sobolev inequality, Poincare...

Feb
17
2009

Geometric PDE Seminar

On a Conjcture of J. Serrin
Haim Brezis
2:00pm|S-101

In 1964 J. Serrin proposed the following conjecture. Let u be a weak solution (in W^{1,1}) of a second order elliptic equation in divergence form, with Holder continuous coefficients, then u is a "classical" solution ( i.e. u belongs to H^1). I will...

Feb
17
2009

Computer Science/Discrete Mathematics Seminar II

Algorithmic Versions of Dense Model Theorems
10:30am|S-101

Green and Tao used the existence of a dense subset indistinguishable from the primes under certain tests from a certain class to prove the existence of arbitrarily long prime arithmetic progressions. Tao and Ziegler showed some general conditions...

Feb
16
2009

Computer Science/Discrete Mathematics Seminar I

Approximating Submodular Functions Everywhere
Nick Harvey
11:15am|S-101

Submodular functions are a key concept in combinatorial optimization. Algorithms that involve submodular functions usually assume that they are given by a (value) oracle. Many interesting problems involving submodular functions can be solved using...