陈景润讨论班报告
报告人：Prof. Klaus Schmidt（Universityof Vienna)
题 目：Onsome of the differences between Z and Z2 in dynamics
时 间：2019.05.28（星期二）, 15:00--16:00
地 点：数学院南楼N913室
摘 要：Around1970 it was discovered that measure preserving actions of Z2 on probability spaces can have remarkably differentproperties from Z-actions, i.e. from actions of single transformations. Many of these differences can be describedas ‘rigidity phenomena’ and manifest themselves in the scarcity of certain objects for Z2-actions which are abundant for Z-actions: they may have unexpectedly few invariant probability measures, invariant sets, isomorphisms or automorphisms.
