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.

文给出实空间形式中超曲面的一个刚定理，同时也得到求面中子流形的刚结果.

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的射影平坦、全实极小子流形，得到了体积下确界与达到下确界的充要条件。