数学季刊 ›› 2010, Vol. 25 ›› Issue (3): 360-365.
摘要: In this paper, we study the compact spacelike submanifolds in the de Sitter space, under the assumption that the normalized mean curvature vector is parallel in the normal bundle. Using the generalized Cheng-Yau’s differential operator, we obtain some general rigidity theorems which naturally generalize some existing results.
中图分类号: