submanifold

In this paper , a rigidity theorem of hypersurface in real space form will begiven.In addition, we obtain rigidity theorems of submanifold in sphere which improvethe result of Hou and Xu.

本文给出实空间形式中超曲个刚性定理，同时也得求中子流形刚性结果.

Projectively flat totally real minimal submanifolds in CP^4 is studied. The infimum of volume and its necessary and sufficient condition are obtained.

摘要研究了射影空间射影平坦、全实极小子流形，得了体积界与达界充要条件。