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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Analytic smoothing effect of a class of ultra-parabolic equations
一类超抛物型方程 解析 光滑效应
2023/11/29
We study a class of ultra-parabolic equations, it is a high order degenerate parabolic operators of Hormander type, so it is strongly degenerate, but we prove that this class operators possesses the a...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Rigidity results in mapping class groups and homeomorphism groups
映射类群 同胚群 刚性结果
2023/11/13
Mapping class groups and homeomorphism groups are symmetry groups of surfaces and all manifolds. They are usually very rigid, in the sense that their automorphism groups only consist of conjugation. I...
2016年3月4日，由中国人民大学老年学研究所设计、中国人民大学科学研究基金与985专项经费支持、中国人民大学中国调查与数据中心具体实施的《中国老年社会追踪调查》（ChinaLongitudinalAgingSocialSurvey,以下简称CLASS）基线调查研究报告在人民大学发布。中国人民大学校长刘伟出席发布会并致辞。中国人民大学老年学研究所所长杜鹏代表课题组发布CLASS研究报告，荣誉一级教...