报告题目:Symbolic dynamics for pointwise hyperbolic systems

报告人:周云华教授(重庆大学)

报告时间:2022129日(周五),下午230-330

腾讯会议号:557-819-616

 

摘要:Under certain conditions, we construct a countable Markov partition for pointwise hyperbolic diffeomorphism $f:M\rightarrow M$ on an open invariant subset $O\subset M$, which allow the Lyapunov exponents to be zero. From this partition we define a symbolic extension that is finite-to-one and onto a subset of $O$ that carries the same finite $f-$invariant measures as $O$. Our method relies upon shadowing theory of recurrent-pointwise-pseudo-orbit we introduced. As a canonical application, we estimate the number of closed orbits for $f$. We also discussed the symbolic dynamics for a certain class of Anosov families.

 

报告人简介:周云华,博士,教授,博士生导师。主要从事动力系统与遍历论方向的研究。已在国内外期刊上发表学术论文30余篇,主持国家自然科学基金、重庆市自然科学基金、中央高校基金等十余项科研项目。国家自然科学基金、中国博士后科学基金、重庆市自然科学基金评审专家,教育部学位中心论文评审专家。获重庆大学自然科学二等奖1项,重庆大学优秀博士论文指导教师,入选重庆市学术技术带头人后备人选。

 

邀请人:史恩慧