%0 Journal Article
%T 局部对称伪黎曼流形中的2-调和类时子流形<br>On the 2-harmonic timelike submanifolds in locally symmetric pseudo-riemannian manifolds
%A 何超
%A 李影
%A 宋卫东&lt
%A br&gt
%A HE Chao
%A LI Ying
%A SONG Wei-dong
%J 山东大学学报（理学版）
%D 2016
%R 10.6040/j.issn.1671-9352.0.2015.496
%X 摘要： 利用活动标架法,研究了局部对称伪黎曼流形中的2-调和类时子流形,得到了这类子流形的Simons型积分不等式以及关于其第二基本形式模长平方的拼挤定理。<br>Abstract: Based on the moving frames, the 2-harmonic timelike submanifolds in locally symmetric pseudo-Riemannian manifolds is studied. Also, an integral inequality of Simonss type and a pinching theorem about the squared norm of the second fundamental form in this submanifolds are obtained
%K 极大类时
%K 2-调和类时子流形
%K 局部对称
%K 伪黎曼流形
%K &lt
%K br&gt
%K locally symmetric
%K 2-harmonic timelike submanifold
%K maximun timelike
%K pseudo-Riemannian manifold
%U http://lxbwk.njournal.sdu.edu.cn/CN/10.6040/j.issn.1671-9352.0.2015.496