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:2020年11月19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 人:马东魁 教授
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数学学院
2020年11月16日
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。