讲座题目:Gromov-Hausdorff limits of Aspherical Manifolds
主讲人:戎小春 教授
主持人:郑宇 教授
开始时间:2025年6月2日 14:30
讲座地址:闵行校区数学楼401
主办单位:数学科学学院
报告人简介:
戎小春,是国际知名的度量黎曼几何专家, 曾获美国斯隆研究奖(Sloan Research Fellowships),美国数学会会士, 应邀在2002年国际数学家大会做45分钟报告, 现为美国罗格斯(Rutgers)大学数学系杰出(Distinguished)教授。戎小春教授主要从事微分几何和度量黎曼几何的研究,在黎曼几何中的收敛和塌陷理论及其应用、正曲率流形几何和拓扑, Alexandrov几何等方面作出了若干基础性的贡献,已在Adv. Math., Amer. J. Math.,Ann. of Math,Duke Math.,GAFA.,Invent. Math.,J. Diff. Geom等国际知名期刊上发表论文50余篇。
报告内容:
Let X be a compact Gromov-Hausdorff limit space of a collapsing sequence of compact asphercial n-manifolds, Mi , of Ricci curvature $Ric_{Mi}≥(n− 1)$ and any point in the Riemannian universal covering space of Mi is a Reifenberg point, or sectional curvature $sec_{Mi} ≥ −1$, respectively. We conjecture that if the fundamental group of Mi $ satisfies a certain condition, then X is diffeomorphic, or homeomorphic to an aspherical manifold, respectively. In this talk, we will present a result that if Mi a diffeomorphic or homeomorphic to a nilmanifold, respectively, then X is diffeomorphic or homeomorphic to a nilmanifold, respectively.