Hypersurfaces with isotropic Blaschke tensor
Hypersurfaces with isotropic Blaschke tensor
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具有各向同性 Blaschke 张量的超曲面
DOI:
10.2969/jmsj/06341155
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发表时间:
2011-10
期刊:
影响因子:
--
通讯作者:
Jianbo Fang
中科院分区:
文献类型:
--
作者:
Zhen Guo;Limiao Lin;Jianbo Fang
Let Mm be an m-dimensional submanifold without umbilical points in the m + 1-dimensional unit sphere S m+1 . Three basic invariants of M m under the Mobius transformation group of S m+1 are a 1-form ' called Mobius form, a symmetric (0,2) tensorA called Blaschke tensor and a positive definite (0,2) tensor g called Mobius metric. We call the Blaschke tensor is isotropic if there exists a function ‚ such that A = ‚g. One of the basic questions in Mobius geometry is to classify the hypersurfaces with isotropic Blaschke tensor. When ‚ is constant, the classification was given by Changping Wang and others. When ‚ is not constant, all hypersurfaces with dimensional m ‚ 3 and isotropic Blaschke tensor are explicitly expressed in this paper. Therefore, for the dimensional m ‚ 3, the above basic question is completely answered.
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影响因子:
64.8
作者:
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通讯作者:
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DOI:
10.1007/bf01694948
发表时间:
--
期刊:
Monatshefte für Mathematik und Physik
影响因子:
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Acta Mathematica Sinica
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