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arxiv: 0711.4595 · v2 · submitted 2007-11-28 · 🧮 math.DG

A Rigidity Theorem for the Hemisphere

classification 🧮 math.DG
keywords boundaryhemisphereisometricmanifoldrigiditystandardtheorembelow
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We prove the following rigidity theorem: For an n-dimensional compact Riemannian manifold with boundary whose Ricci curvature is bounded by n-1 from below, if its boundary is isometric to the standard sphere of dimension n-1 and totally geodesic, then the manifold is isometric to the standard hemisphere.

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