A Class of Homogeneous Einstein Manifolds*

A Class of Homogeneous Einstein Manifolds*
复制标题

一类齐次爱因斯坦流形*

DOI:
10.1007/s11401-005-0032-0
复制
发表时间:
2006
期刊:
影响因子:
--
通讯作者:
Ke Liang
Ke Liang
中科院分区:
--
文献类型:
--
作者:
Yifang Kang;Ke Liang

文献摘要

参考文献

相似文献

如果黎曼流形(M, g)的里奇张量满足r=c·g,则称为爱因斯坦流形。一般的存在性结果是很难得到的,例如,是否每一个紧化流形都承认一个爱因斯坦度规是未知的。一种自然的方法是施加额外的齐次假设。M. Y. Wang和W. Ziller在紧齐次空间eg /H上得到了一些结果。他们研究了标准齐次度量,即由onG/H形式的kill诱导的度量,并得到了一些分类结果。本文给出了齐次空间eg /Hare研究上的一些更一般的齐次度量,并给出了该度量为爱因斯坦的充要条件。作者还给出了一些具有非标准齐次度量的爱因斯坦流形的例子。
AbstractA Riemannian manifold (M, g) is called Einstein manifold if its Ricci tensor satisfiesr=c⋅gfor some constantc. General existence results are hard to obtain, e.g., it is as yet unknown whether every compact manifold admits an Einstein metric. A natural approach is to impose additional homogeneous assumptions. M. Y. Wang and W. Ziller have got some results on compact homogeneous spaceG/H. They investigate standard homogeneous metrics, the metric induced by Killing form onG/H, and get some classification results. In this paper some more general homogeneous metrics on some homogeneous spaceG/Hare studies, and a necessary and sufficient condition for this metric to be Einstein is given. The authors also give some examples of Einstein manifolds with non-standard homogeneous metrics.
DOI: --
发表时间: 2005
期刊:
影响因子: --
作者:
T. Kobayashi;T. Oshima
通讯作者: T. Oshima