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发布时间:2020-11-16文章来源:华南理工大学数学学院浏览次数:432

报告题目SRB measures for pointwise hyperbolic systems on open regions

报  告  人:周云华  教授(重庆大学)

报告时间:20201119日(星期四)下午14:30-15:30

报告地点:腾讯会议,会议号982854038,会议密码:654321

邀  请  :马东魁  教授

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数学学院

20201116

 

报告摘要

A diffeomorphism $f: M\to M$ is pointwise partially hyperbolic on an open invariant subset $N\subset M$ if there is an invariant decomposition $T_NM=E^u\oplus E^c\oplus E^s$ such that $D_xf$ is strictly expanding on $E^u_x$ and contracting on $E^s_x$ at each $x\in N$. We show that under certain conditions $f$ has unstable and stable manifolds, and admits a finite or an infinite $u$-Gibbs measure $\mu$. If $f$ is pointwise hyperbolic on $N$, then $\mu$ is an SRB measure or an infinite SRB measure.  As applications, we show that some almost Anosov diffeomorphisms and gentle perturbations of Katok's map have the properties. This is a joint work with Jianyu Chen and Huyi Hu.

 

报告人简介

周云华,重庆大学教授、博导,重庆市学术技术带头人后备人选。研究方向为微分动力系统与遍历论,在包括Trans. Amer.Math. Soc, JDE, ETDS, DCDS, Sci. China Math等重要学术刊物上发表学术论文二十余篇,主持国家自然科学基金、重庆市自然科学基金、中央高校基本科研业务专项等多项科研项目。