Previous Conferences & Workshops

Apr
07
2009

Geometric PDE Seminar

Half-Laplacian Problems Related to Crystal Dislocations
2:00pm|S-101

Dislocations are line defects in crystals, and can be modeled using non-local operators. In this talk we will consider a related reaction-diffusion equation with a half-Laplacian. We show that the limit dynamics is characterized by a system of ODEs...

Apr
07
2009

Computer Science/Discrete Mathematics Seminar II

On the Parallel Repetition Theorem
Thomas Holenstein
10:30am|S-101

The Parallel Repetition Theorem by Raz is used to amplify the soundness of PCP's, and is one of the ingredients to prove strong inapproximability results. Unfortunately, Raz's proof was very complicated. In these two talks, I will present the...

Apr
06
2009

Members’ Seminar

Local Entropy and Projections of Dynamically Defined Fractals
2:00pm|S-101

If a closed subset X of the plane is projected orthogonally onto a line, then the Hausdorff dimension of the image is no larger than the dimension of X (since the projection is Lipschitz), and also no larger than 1 (since it is a subset of a line)...

Apr
06
2009

Computer Science/Discrete Mathematics Seminar I

Public Key Cryptography from Different Assumptions
Benny Applebaum
11:15am|S-101

This work attempts to broaden the foundations of public-key cryptography. We construct a new public key encryption based on two “hardness on average” assumptions: (1) it is hard to “learn parity with noise” for random sparse equations; and (2) it is...

Apr
02
2009

Joint IAS/Princeton University Number Theory Seminar

A Rigid Irregular Connection on the Projective Line
4:30pm|Fine Hall -- 214

From the trace formula and the global Langlands correspondence one can infer the existence of a particular rigid l-adic local system on the projective line with tame ramification at 0 and wild ramification, of the mildest possible kind, at infinity...

Apr
01
2009

Workshop on Topology: Identifying Order in Complex Systems

Stimulus Space Topology and Geometry from Neural Activity
Carina Curto
5:00pm|S-101

We construct our understanding of the world solely from neuronal activity generated in our brains. How do we do this? Many studies have investigated how the electrical activity of neurons (action potentials) is related to outside stimuli, and maps...

Apr
01
2009

Mathematical Physics Seminar

Mass Renormalization in Non-Relativistic Quantum Electrodynamics
Volker Bach
11:30am|S-101

In this talk I review recent results on the infrared mass renormalization in non-relativistic quantum electrodynamics (non-relativistic particle system interacting with quantized electro-magnetic field). The review will also include the description...