Previous Conferences & Workshops

Apr
16
2014

Non-equilibrium Dynamics and Random Matrices

Limiting Eigenvalue Distribution of Random Matrices Involving Tensor Product
Leonid Pastur
2:00pm|S-101

We consider two classes of \(n \times n\) sample covariance matrices arising in quantum informatics. The first class consists of matrices whose data matrix has \(m\) independent columns each of which is the tensor product of \(k\) independent \(d\)...

Apr
15
2014

Non-equilibrium Dynamics and Random Matrices

Duistermaat-Hackamn measures and Pitman theorem
Philippe Biane
4:30pm|S-101

I will explain how Pitman's theorem on Brownian motion and the three dimensional Bessel process can be extended to several dimensions, and the connection with random matrices, and combinatorial representation theory, notably the Littelmann path...

Apr
15
2014

Computer Science/Discrete Mathematics Seminar II

IP = PSPACE via error correcting codes
10:30am|S-101

The IP theorem, which asserts that IP = PSPACE (Lund et. al., and Shamir, in J. ACM 39(4)), is one of the major achievements of complexity theory. The known proofs of the theorem are based on the arithmetization technique, which transforms a...

Apr
14
2014

Members’ Seminar

Toroidal Soap Bubbles: Constant Mean Curvature Tori in \(S^3\) and \(R^3\)
2:00pm|S-101

Constant mean curvature (CMC) tori in \(S^3\), \(R^3\) or \(H^3\) are in bijective correspondence with spectral curve data, consisting of a hyperelliptic curve, a line bundle on this curve and some additional data, which in particular determines the...

Apr
14
2014

Computer Science/Discrete Mathematics Seminar I

Local Correctability of Expander Codes
Brett Hemenway
11:15am|S-101

An error-correcting code is called locally decodable if there exists a decoding algorithm that can recover any symbol of the message with high probability by reading only a small number of symbols of the corrupted codeword. There is a fundamental...

Apr
10
2014

Joint IAS/Princeton University Number Theory Seminar

Applications of additive combinatorics to Diophantine equations
4:30pm|S-101

The work of Green, Tao and Ziegler can be used to prove existence and approximation properties for rational solutions of the Diophantine equations that describe representations of a product of norm forms by a product of linear polynomials. One can...

Apr
09
2014

Mathematical Conversations

On characters and words in groups
6:00pm|Dilworth Room

In 1896, Frobenius obtained a remarkable character-theoretic formula for the number of solutions to the equation \(xyx^{-1}y^{-1}=g\), for any finite group \(G\) and element \(g \in G\). While more than a century has since passed, our understanding...