Title: Entropy in measurable dynamics
Speaker: Lewis Bowen
Speaker Info: University of Texas at Austin
Brief Description:
Special Note:
Abstract:
In 1958, Kolmogorov defined the entropy of a probability measure preserving transformation. Entropy has since been central to the classification theory of measurable dynamics. In the 70s and 80s researchers extended entropy theory to measure preserving actions of amenable groups (Kieffer, Ornstein-Weiss). My recent work generalizes the entropy concept to actions of sofic groups; a class of groups that contains for example, all subgroups of GL(n,C). Applications include the classification of Bernoulli shifts over a free group, answering a question of Ornstein and Weiss.Date: Wednesday, February 26, 2014