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局部强凸二次超曲面的刻画(英文)

Some characterizations of locally strongly convex quadric
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摘要 设An+1是幺模仿射空间,Lr是An+1中紧致、连通、局部强凸的超曲面M的r阶仿射平均曲率,本文通过Lr给出了若干关于二次曲面M的新的特征刻画. Let An+1 be the real unimodular affine space,Lr be the rth affine mean curvature of a connected compact,locally strongly convex hypersurface M in An+1 ,there are many results characterizing the quadrics by Lr.In this paper,the authors get some new results in this direction.
出处 《四川大学学报(自然科学版)》 CAS CSCD 北大核心 2014年第2期236-239,共4页 Journal of Sichuan University(Natural Science Edition)
基金 国家自然科学基金(11171235)
关键词 仿射平均曲率 二次曲面 卵形面 Affine mean curvature Hypersurface Quadric Ellipsoid
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