题 目：Hang-Wang type Rigidity theorem

报告人：来米加(上海交通大学)

摘 要：Let (M, g) be a compact Riemannian manifold with boundary. Suppose Ric \geq n-1, Hang and Wang proved that M is isometric to the standard hemisphere provided that $\partial M$ is isometric to $S^{n-1}$ and convex. In this talk,  we present a generalization of this result. We assume the $\partial M $ is isometric to a product manifold with one sphere factor, and pose some conditions on the second fundamental form of $\partial M$. It turns out $M$ is isometric to a doubly warped product metric.

时 间：2019年6月14日 10:00–12:00

地 点：蒙民伟楼1105室

邀请人：陈学长 老师