Uniqueness of isometric immersions with the same mean curvature

Abstract

Motivated by the quasi-local mass problem in general relativity, we study the rigidity of isometric immersions with the same mean curvature into a warped product space. As a corollary of our main result, two star-shaped hypersurfaces in a spatial Schwarzschild or AdS-Schwarzschild manifold with nonzero mass differ only by a rotation if they are isometric and have the same mean curvature. We also give similar results if the mean curvature condition is replaced by an ${\sigma }_2$-curvature condition.

arXiv comment23 pages, introduction revised, references updated

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