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The topological rigidity theorem for submanifolds in space forms
Juanru Gu, Hongwei Xu
Let be an -dimensional compact submanifold in the simply connected space form with constant curvature , where is the mean curvature of .…
A new gap for complete hypersurfaces with constant mean curvature in space forms
Juanru Gu, Li Lei, Hongwei Xu
Let be an -dimensional closed hypersurface with constant mean curvature and constant scalar curvature in an unit sphere. Denote by and the mean curvature and the squ…
Rigidity of submanifolds with parallel mean curvature in space froms
Hong-Wei Xu, Juan-Ru Gu
Let be an -dimensional oriented compact submanifold with parallel mean curvature in the simply connected space form with , where is the mean…
On Yau rigidity theorem for minimal submanifolds in spheres
Juan-Ru Gu, Hong-Wei Xu
In this note, we investigate the well-known Yau rigidity theorem for minimal submanifolds in spheres. Using the parameter method of Yau and the DDVV inequality verified by Lu, Ge a…
The sphere theorems for manifolds with positive scalar curvature
Juan-Ru Gu, Hong-Wei Xu
Some new differentiable sphere theorems are obtained via the Ricci flow and stable currents. We prove that if is a compact manifold whose normalized scalar curvature and sect…