School of Mathematics

Mathematical Theories of Interaction with Oracles: Active Property Testing and New Models for Learning Boolean Functions

Liu Yang
School of Computer Science, Carnegie Mellon University
February 11, 2013

With the notion of interaction with oracles as a unifying theme of much of my dissertation work, I discuss novel models and results for property testing and computational learning, with the use of Fourier analytic and probabilistic methods.

Large Data Dynamics for Nonlinear Dispersive PDEs

Wilhelm Schlag
University of Chicago
February 1, 2013

We will discuss recent work on wave evolutions for large data. Particular emphasis will be placed on concentration compactness ideas. Amongst others, we will describe a result for wave equations from R^3 minus the unit ball into the sphere S^3 where we can show that any solution approaches the unique harmonic map in its degree class.
Joint work with Cote, Kenig, Lawrie, Nakanishi -- in various combinations.