报告人:周云华教授
报告题目:Shadowing for nonuniformly hyperbolic maps in Hilbert spaces
主持人:糜泽亚副教授
报告时间:2022年5月24日09:30-11:30
报告地点:腾讯会议(ID: 678-128-206)
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报告摘要:
We prove a shadowing lemma for nonuniformly hyperbolic maps in Hilbert spaces. As applications, we firstly prove that the positive Lyapunov exponents of a hyperbolic ergodic measure \mu can be approximated by positive Lyapunov exponents of atomic measures on hyperbolic periodic orbits; secondly, give an upper estimation of metric entropy by using the exponential growth rate of the number of such periodic points that their atomic measures approximate \mu and their positive Lyapunov exponents approximate the positive Lyapunov exponents of \mu.
报告人简介:
周云华,男,重庆大学数学与统计学院教授,博士生导师。2009年毕业于北京大学,同年入职重庆大学。研究领域为微分动力系统与遍历论,主要研究紧致黎曼流形上部分双曲、非一致双曲动力系统的拓扑和遍历论性质,包括熵理论、Lyapunov指数、遍历性、跟踪引理等。已在Trans. Amer. Math. Soc.,Ergodic Theory Dynam. Systems,J. Differential Equations,Sci. China Math.等国内外期刊上发表学术论文30余篇。
数学与统计学院
2022年5月21日