Abstract
LetM be a complete Riemannian manifold with Ricci curvature having a positive lower bound. In this paper, we prove some rigidity theorems forM by the existence of a nice minimal hypersurface and a sphere theorem aboutM. We also generalize a Myers theorem stating that there is no closed immersed minimal submanifolds in an open hemisphere to the case that the ambient space is a complete Riemannian manifold withk-th Ricci curvature having a positive lower bound.
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Supported by the JSPS postdoctoral fellowship and NSF of China
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Xia, C. Rigidity and sphere theorem for manifolds with positive Ricci curvature. Manuscripta Math 85, 79–87 (1994). https://doi.org/10.1007/BF02568185
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DOI: https://doi.org/10.1007/BF02568185