INTERDISCIPLINARY STOCHASTIC PROCESSES COLLOQUIUM Tuesday September 5, room 60 Evans, 4.10 - 5.00pm Speaker: Elchanan Mossel (Statistics, U.C. Berkeley) Title: "Noise stable sets in discrete and Gaussian spaces". Abstract: In this talk I will review some applications of a new invariance principle derived jointly with R. O'Donnell and K. Oleszkiewicz for functions that are stable against noise acting independently on each coordinate in a product space. In particular, I will discuss the following: 1. Recent results with I. Dinur and O. Regev regarding the structure of independent sets in graphs, 2. The probability of a Condorcet's paradox in voting and 3. The "Peace Sign Conjecture". This is an Ornstein-Uhlenbeck analogue of the "double-bubble" theorem.