Videos

Lecture: Thursday, September 25, 2014 – Jean-Christophe Yoccoz

Jean-Christophe Yoccoz: Regularity versus chaos in area preserving maps

Abstract:
I will present what is perhaps the most important open question in the theory of dynamical systems : do typical area-preserving maps have positive measure-theoretic entropy ? The so-called « standard map family » offers a very concrete instance of this problem.