Home /  Workshop /  Schedules /  Hypersurfaces with non-negative scalar curvature

Hypersurfaces with non-negative scalar curvature

Connections for Women: Mathematical General Relativity September 03, 2013 - September 04, 2013

September 03, 2013 (09:00 AM PDT - 10:00 AM PDT)
Speaker(s): Lan-Hsuan Huang (University of Connecticut)
Location: SLMath: Eisenbud Auditorium
Primary Mathematics Subject Classification No Primary AMS MSC
Secondary Mathematics Subject Classification No Secondary AMS MSC
Video

v1150

Abstract Since the time of Gauss, geometers have been interested in the interplay between the intrinsic structure of hypersurfaces and their extrinsic geometry from the ambient space. Many classical results discuss the sectional curvature. For example, it is known that a complete hypersurface in Euclidean space with non-negative sectional curvature is either convex or a generalized hypercylinder. In a series of joint work with Damin Wu, we study hypersurfaces with non-negative scalar curvature. We prove that a closed hypersurface with nonnegative scalar curvature must be weakly mean convex. In general, vanishing scalar curvature causes analytical difficulties because the scalar curvature operator may not be elliptic. We tackle the problem by studying the level sets of a height function, which is motivated by general relativity. We further extend our proof to unbounded hypersurfaces which are asymptotically flat at infinity and obtain applications in the positive mass theorem and the Penrose inequality.
Supplements
18941?type=thumb Huang 215 KB application/pdf Download
Video/Audio Files

v1150

H.264 Video v1150.m4v 297 MB video/mp4 rtsp://videos.msri.org/v1150/v1150.m4v Download
Quicktime v1150.mov 419 MB video/quicktime rtsp://videos.msri.org/data/000/017/687/original/v1150.mov Download
Troubles with video?

Please report video problems to itsupport@slmath.org.

See more of our Streaming videos on our main VMath Videos page.