Displaying similar documents to “On some condition for a submanifold of Euclidean space to be a sphere”

Willmore submanifolds in the unit sphere.

Guo Zhen (2004)

Collectanea Mathematica

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In this paper we generalize the self-adjoint differential operator (used by Cheng-Yau) on hypersurfaces of a constant curvature manifold to general submanifolds. The generalized operator is no longer self-adjoint. However we present its adjoint operator. By using this operator we get the pinching theorem on Willmore submanifolds which is analogous to the pinching theorem on minimal submanifold of a sphere given by Simon and Chern-Do Carmo-Kobayashi.