吉林大学学报(理学版)

• 数学 • 上一篇    下一篇

de Sitter空间中的紧致极大类时子流形

胡有婧1, 纪永强2   

  1. 1. 宁夏大学 数学计算机学院, 银川 750021; 2. 湖州师范学院 理学院, 浙江 湖州 313000
  • 收稿日期:2013-12-05 出版日期:2014-09-26 发布日期:2014-09-26
  • 通讯作者: 胡有婧 E-mail:hyq@nxu.edu.cn

The Compact Timelike Submanifolds in the de Sitter Space

HU Youjing1, JI Yongqiang2   

  1. 1. College of Mathematics and Computer Science, Ningxia University, Yinchuan 750021, China;2. College of Science, Huzhou Teachers College, Huzhou 313000, Zhejiang Province, China
  • Received:2013-12-05 Online:2014-09-26 Published:2014-09-26
  • Contact: HU Youjing E-mail:hyq@nxu.edu.cn

摘要:

采用活动标架法, 得到de Sitter空间中类时子流形的Ricci恒等式和第二基本形式长度平方的Laplacian, 并得到de Sitter空间中紧致极大类时子流形成为全测地子流形的一些充分条件.

关键词: de Sitter空间, Ricci恒等式, 类时, 全测地

Abstract:

Based on  the  moving frams, the Ricci identity and the Laplacian about the squared norm of the second fundamental form for the timelike submanifolds in de Sitter space were calculated, and some necessary conditions for the compact maximal timelike submanifold in de Sitter space were given.

Key words: de Sitter space, Ricci identity, timelike, totally geodesic

中图分类号: 

  • O186.12