Tel Aviv University Hello everyone, The next colloquium talk will be held on: Monday, 10/6/2013, 12:15, Schreiber 006, Tel Aviv University. Speaker: Andre Reznikov (Bar-Ilan University) Title: Restriction of eigenfunctions and representation theory The abstract is given below. Tea and coffee at 12:00, same room. Hope to see you there. For information about future colloquia, see <http://www.math.tau.ac.il/~ostrover/colloquium/colloq2012.html> Yours, Yaron ************************************* Abstract:I will consider analytic properties of eigenfunctions of the Laplace-Beltrami equation on a compact hyperbolic surface. I will show how to deduce a uniform lower bound for the norm of the restriction to a fixed closed geodesic. The proof I present is based on methods in representation theory, and, in particular, on the use of the unique trilinear invariant functional on representations of GL(2,R). Such a functional will play a role of a (quantification of) pseudo-differential calculus. (Joint with J. Bernstein, A. Gosh, P. Sarnak) --------------------------------------------------------- Technion Math Net-2 (TECHMATH2) Editor: Michael Cwikel <techm@math.technion.ac.il> Announcement from: <ostrover@post.tau.ac.il>