Previous Conferences & Workshops

May
03
2010

Members’ Seminar

Extreme Gaps in the Spectrum of Random Matrices
Gerard Arous
2:00pm|S-101

I will present a recent joint work with Paul Bourgade (Paris) about the extreme gaps between eigenvalues of random matrices. We give the joint limiting law of the smallest gaps for Haar-distributed unitary matrices and matrices from the Gaussian...

Apr
29
2010

Joint IAS/Princeton University Number Theory Seminar

Deformation rings of Group Representations
Bart de Smit
4:30pm|Fine Hall -- 214

The motivating open question for this talk is to find for a given prime p all local Z_p-algebras which can occur as the deformation ring of some linear representation over F_p of some finite group G. We will show for every p that not all of them are...

Apr
28
2010

Special Mathematical Physics Seminar

Mathematical Structures in N=2 Gauge Theory
2:00pm|S-101

The theory of Hitchin systems and their moduli spaces of solutions has important connections to N=2 gauge theory in four dimensions. Exploring this connection, we have conjectured the existence of certain integral invariants which encode the...

Apr
27
2010

Computer Science/Discrete Mathematics Seminar II

Hardness of Approximately Solving Linear Equations Over Reals
10:30am|S-101

We consider the problem of approximately solving a system of homogeneous linear equations over reals, where each equation contains at most three variables. Since the all-zero assignment always satisfies all the equations exactly, we restrict the...

Apr
26
2010

Geometry and Materials Seminar

Equilibrium Shapes for Anisotropic Surface Energies
Bennett Palmer
3:30pm|S-101

We will discuss the geometry of equilibrium surfaces for anisotropic surface energies. In particular, the shape of solutions of free boundary problems will be discussed when the total energy includes wetting energy and anisotropic line tension...

Apr
22
2010

Joint IAS/Princeton University Number Theory Seminar

Deformation rings of Group Representations
Bart de Smit
4:30pm|Fine Hall -- 214

The motivating open question for this talk is to find for a given prime p all local Z_p-algebras which can occur as the deformation ring of some linear representation over F_p of some finite group G. We will show for every p that not all of them are...

Apr
21
2010

Special Eyjafjallajökull Seminar

Fast and Slow
Michael Berry
5:30pm|S-101

In classical or quantum systems with time scales widely separated by a small slowness parameter, the fast system is driven by the slow and reacts back on it. The asymptotics of the driven fast motion has been much studied, but understanding the...

Apr
21
2010

Special Mathematical Physics Seminar

On Quantum Sigma Models With Non-Abelian Winding
Reimundo Heluani
4:00pm|S-101

We will briefly review the construction of the quantum sigma model with target a Torus adapting the work of Kapustin and Orlov (hep-th/0010293v2) to the Hamiltonian setup. This allows us to set up mirror-symmetry for tori entirely within the vertex...

Apr
20
2010

Geometry/Dynamical Systems Seminar

On the Multiplicity of Periodic Orbits for Tonelli Systems
Marco Mazzucchelli
4:30pm|S-101

In this talk I shall sketch a proof of the following result: on a closed configuration space M, the Euler-Lagrange system associated to any time-periodic Tonelli Lagrangian function L : R/Z x TM --> R admits infinitely many periodic solutions. More...