数学物理学报 ›› 2000, Vol. 20 ›› Issue (2): 158-162.

• 论文 • 上一篇    下一篇

关于具有平行第二基本形式的伪脐子流形

  

  1. (安徽师范大学数学系  芜湖 241000)
  • 出版日期:2000-03-03 发布日期:2000-03-03

On the Pseudo-umbilical Submanifolds with Parallel Second Fundamental Form

  1. (Department of Mathematics, Anhui Normal University, Anhui 241000)
  • Online:2000-03-03 Published:2000-03-03

摘要:

该文研究了完备黎曼流形Nn+p中的具有平行第二基本形式的伪脐子流形,获得这类子流形的第二基本形式模长平方的一个拼挤定理.

关键词: 平行第二基本形式, 伪脐子流形, 全测地

Abstract:

In this paper, we discussed the oriented closed pseudo-umbilical submanifold with parallel second fundamental form in a Riemannian manifold Nn+p. we prove a pinching theorem for length of second fundamental form for this submanifolds in Nn+p.

Key words: Parallelsecondfundamentalform, Pseudoumbilicalsubmanifolds, Totallygeodesic