摘要
讨论了伪黎曼流形中具有平行第二基本形式的类空子流形,得到了它的第二基本形式模长平方有界的一个拼挤条件,推广了已有结论.
Space-like submanifolds with parallel second fundamental form in Pseudo Riemannian manifolds are studied, a pinched condition for the squared length of the second fundamental form of such submanifolds to be bounded from above is obtained,generalizing the existed result.
出处
《甘肃高师学报》
2015年第2期1-3,共3页
Journal of Gansu Normal Colleges
基金
定西师专青年人才工程资助计划
定西师专青年项目(1333)
关键词
伪黎曼流形
平行第二基本形式
类空子流形
pseudo-riemannian manifold
parallel second fundamental form
space-like submanifolds
