Previous Conferences & Workshops

Nov
12
2013

Non-equilibrium Dynamics and Random Matrices

Covariance Matrix Estimation for the Cryo-EM Heterogeneity Problem
Singer, Amit
2:00pm|S-101

In cryo-electron microscopy (cryo-EM), a microscope generates a top view of a sample of randomly-oriented copies of a molecule. The cryo-EM problem is to use the resulting set of noisy 2D projection images taken at unknown directions to reconstruct...

Nov
12
2013

Computer Science/Discrete Mathematics Seminar II

Hypermatrix Algebra, their spectral decomposition and applications
10:30am|S-101

In this talk we will present an overview of the hypermatrix generalization of matrix algebra proposed by Mesner and Bhattacharya in 1990. We will discuss a spectral theorem for hypermatrices deduced from this algebra as well as connections with...

Nov
11
2013

Members’ Seminar

cdh methods in K-theory and Hochschild homology
2:00pm|S-101

This is intended to be a survey talk, accessible to a general mathematical audience. The cdh topology was created by Voevodsky to extend motivic cohomology from smooth varieties to singular varieties, assuming resolution of singularities (for...

Nov
11
2013

Computer Science/Discrete Mathematics Seminar I

Communication Lower Bounds via Block Sensitivity
Toni Pitassi
11:15am|S-101

We use critical block sensitivity, a new complexity measure introduced by Huynh and Nordstrom (STOC 2012) to study the communication complexity of search problems. Our main result is a simple proof that if \(S\) is a search problem with high...

Nov
08
2013

Mathematical Conversations

The cosmic Galois group, a tale of geometry, number theory and physics
6:30pm|Dilworth Room

Grothendieck has proposed, under the name of "motives" a kind of Galois theory for non algebraic numbers. A mystery of the so-called "standard model" in high energy physics is the occurrence of about twenty numerical constants, independent of the...

Nov
08
2013

Joint IAS/Princeton University Symplectic Geometry Seminar

Tori in four-dimensional Milnor fibres
1:30pm|Fine 322, Princeton University

The Milnor fibre of any isolated hypersurface singularity contains exact Lagrangian spheres: the vanishing cycles associated to a Morsification of the singularity. Moreover, for simple singularities, it is known that the only possible exact...