题目：Billiards with varied reflection ratios and exterior billiards with barriers
报告人：Prof. Jun Hu （胡俊教授）
The City University of New York
摘要：We study the dynamics of a type of billiards with varied reflection ratios on a square or disk table. Induced one-parameter families of exterior billiards and one-parameter of piece-wise circle diffeomorphisms are employed to study the dynamics of this type of billiards.
时间：2017 年 9 月 21 日（周四）16:00-17:00