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洛伦兹空间中紧致类空超曲面:新积分公式与高阶平均曲率(英文)

Compact Spaclike Hypersurfaces of Lorent Space:New Integral Formulas and r-Mean Curvature
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摘要 设M是洛伦兹空间L^(n+1)中紧致无边定向类空等距浸入超曲面.首先得到一类新的积分公式.然后,通过应用这些积分公式,证明了:如果存在一个整数r(1≤r≤n-1)使得高阶平均曲率Hi>0,i=1,2,…,r,而且Hr是常数,则M是全脐的. Let M be an oriented and compact spacelike hypersurface without boundary in the Lorentz space Ln+1 In this work, we firstly attain a class of new integral formulas. Then we apply these integral formulas to prove that M is totally umbilical if there exists an integer r ( 1 ≤ r ≤n - 1 ) such that the i-mean curvature Hi 〉0,i = 1,2, …, r and Hr is constant.
作者 王琪
出处 《湖南师范大学自然科学学报》 CAS 北大核心 2017年第6期66-70,共5页 Journal of Natural Science of Hunan Normal University
基金 贵州省科学技术基金资助项目(黔科合LH字[2015]7298)
关键词 洛伦兹空间 紧致类空超曲面 积分公式 高阶平均曲率 全脐性质 Lorentz space compact spacelike hypersurface integral formula r-mean curvature totally umbilical property
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