主题：Entropy for actions of sofic groups

报告题目：Entropy for actions of sofic groups

报告人：Li Hanfeng 教授（State University of New York, USA）

时间：2010.7.6（周二）下午3:30

地点：理科楼309

Abstract: Entropy is a numerical invariant for measurable or topological dynamical systems. Classically, entropy is defined for measurable or continuous actions of countable amenable groups. Recently Lewis Bowen introduced entropy invariants for measure-preserving actions of countable sofic groups (including both amenable groups and residually finite groups) when there are generating countable partitions with
finite entropy. I will describe an approach to define entropy for any measure-preserving actions on standard probability spaces and continuous actions on compact metrizable spaces of countable sofic groups. This is joint work with David Kerr.

报告人简介：

Associate Professor at State University of New York at Bu alo.

Ph.D. in Mathematics, University of California at Berkeley, December 2002.
Ph.D. Advisor: Professor Marc Rie el.
B.S. in Mathematics, Peking University (P. R. China), June 1997.

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