一、报告题目:Longtime robustness of pullback random attractors
二、报告人:西南大学best365在线官网登录入口博士生导师 李扬荣教授
三、报告时间:2019年5月23日(星期四)下午4:00-5:00
四、报告地点:慧智楼90510(数统学院会议室)
五、主讲人介绍:
李扬荣,西南大学best365在线官网登录入口教授,博导。博士(南京大学1996), 博士后(北京应用物理与计算数学所)。现任重庆数学学会副理事长,重庆工业与应用数学学会监事长, 曾任中国数学会理事。主要研究随机偏微分方程的渐近性态及其上的随机动力系统,先后在J. Dyna. Diff. Equ, J. Diff. Equ, Physica D, J. Appl .Probab, Appl. Math. Comp.等期刊上发表论文100余篇,其中SCI论文60余篇, 高被引论文3 篇(随机动力系统为主题的高被引论文共7 篇,其余4篇为美国学者)。目前主持在研国家自然科学基金面上项目, 曾获重庆市自然科学奖二等奖,优教成果二等奖及重庆市高校中青年骨干教师称号。
六、报告内容摘要
In this talk, we focus on the semi-continuity of a pullback random attractor (PRA) at infinite time. We first establish the criteria for backward compactness of a PRA from a backward limit-set compact cocycle. We then prove that backward compactness of a PRA is a necessary and sufficient condition such that its time-fibers are upper semi-continuous at negative infinity, and obtain the minimal compact limit-set. We further obtain the maximal limit-set in the lower semi-continuity sense. The abstract results are illustrated in the contexts of stochastic magneto-hydrodynamics equations. Some further questions (or subjects) are proposed.