## Joint IAS/PU Number Theory Seminar

## Overview of the p-Adic Local Langlands Correspondence for $GL(2,Q_p)$

(Introduction to the Lecture Series and and overview for those unable to attend the whole Lecture Series)

## The Completed Cohomology of Arithmetic Groups

## Topology of Random Simplicial Complexes

In this talk I will overview two very different kinds of random simplicial complex, both of which could be considered higher-dimensional generalizations of the Erdos-Renyi random graph, and discuss what is known and not known about the expected topology of each. Some of this is joint work with Eric Babson and Chris Hoffman.

## Pseudorandom Generators for $CCO[p]$ and the Fourier Spectrum of Low-Degree Polynomials Over Finite Fields

## Geometry and Cell Complexes

## Potential Automorphy

I will introduce l-adic representations and what it means for them to be automorphic, talk about potential automorphy as an alternative to automorphy, explain what can currently be proved (but not how) and discuss what seem to me the important open problems. This should serve as an introduction to half the special year for non-number theorists. The other major theme will likely be the `p-adic Langlands program', which I will not address (but perhaps someone else will).

## Members Seminar

## Super-uniformity of the typical billiard path (proof included)

I will describe the proof of the following surprising result: the typical billiard paths form the family of the most uniformly distributed curves in the unit square. I will justify this vague claim with a precise statement. As a byproduct, we obtain the counter-intuitive fact that the complexity of the test set is almost irrelevant. The error term is shockingly small, and it does not matter that we test uniformity with a nice set (like a circle or a square), or with an arbitrarily ugly Lebesgue measurable subset of the unit square.