By the use of group action and normal covering we give an answer in some conditions from topological rigiditytheorem in this article.
本文通过群作用和正则覆盖,利用拓扑刚性定理对此问题给出一个判定性条件。
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This paper discusses the space-like submanifolds with constant mean curvature in a pseudo-Riemannian space form, and obtain an integrate inequality and a rigiditytheorem.