报告题目：A generalization of expansivity and its applications

报告人：李杰 博士（中国科学技术大学）

报告时间：5月27日上午10:00

报告地点：数学实验室（工北412）

摘要：In this talk we will discuss a class of generalized expansive dynamical systems for which at most countable orbits can be accompanied by an arbitrary given orbit. Examples of different levels of generalized expansiveness are constructed.

When the dynamical system considered has countable cardinality, several characterizations of generalized expansive homeomorphism are provided, and as a consequence examples of dynamical systems with van der Waerden depth equal to any given countable ordinal number are demonstrated, which solves open questions existing in the literature.

欢迎全校师生参加！
注：本次讲座将纳入数学系继续教育课程。

理学院

2016年5月25日