Events for 11/28/2017 from all calendars
Working Seminar in Orbit Equivalence and Measured Group Theory
Time: 2:00PM - 3:00PM
Location: BLOC 220
Speaker: Mehrzad Monzavi
Title: Stable Actions and Central Extensions II
Abstract: The proof of the main theorem will be continued via the usage of co-induced actions for equivalence relations.
Mathematical Physics and Harmonic Analysis Seminar
Time: 4:00PM - 5:00PM
Location: BLOC 624
Speaker: Semyon Dyatlov, MIT/Berkeley
Title: Lower bounds on eigenfunctions on hyperbolic surfaces
Abstract: I show that on a compact hyperbolic surface, the mass of an $L^2$-normalized eigenfunction of the Laplacian on any nonempty open set is bounded below by a positive constant depending on the set, but not on the eigenvalue. This statement, more precisely its stronger semiclassical version, has many applications including control for the Schr\"odinger equation and the full support property for semiclassical defect measures. The key new ingredient of the proof is a fractal uncertainty principle, stating that no function can be localized close to a porous set in both position and frequency. This talk is based on joint works with Long Jin and with Jean Bourgain.
Student/Postdoc Working Geometry Seminar
Time: 5:00PM - 6:00PM
Location: BLOC 628
Speaker: P. Sarin, TAMU
Title: Surgery cont'd