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arXiv 1010.5488math.DG
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关于翘曲积Einstein度量的分类

On the classification of warped product Einstein metrics

Chenxu He, Peter Petersen, William Wylie

摘要:

本文采用Case-Shu-Wei提出的观点,通过底空间的里奇曲率方程来研究翘积Einstein度量。他们称这个方程为准爱因斯坦方程,但我们也称之为$m$ -爱因斯坦方程.本文推广了Case-Shu-Wei的工作和Kim-Kim的一些早期工作,使基具有非空边界。这是一个自然的情况,因为一个没有边界的流形经常出现作为一个扭曲的产品在一个带边流形的边界,在这种情况下,我们得到了一些有趣的新的典型的例子。我们还导出了一些新的公式,这些公式涉及类似于梯度Ricci孤子的曲率。作为应用,我们刻画了当基底局部共形平坦时的翘曲积爱因斯坦度量。

英文摘要:

In this paper we take the perspective introduced by Case-Shu-Wei of studying warped product Einstein metrics through the equation for the Ricci curvature of the base space. They call this equation on the base the $m$-Quasi Einstein equation, but we will also call it the $(λ,n+m)$-Einstein equation. In this paper we extend the work of Case-Shu-Wei and some earlier work of Kim-Kim to allow the base to have non-empty boundary. This is a natural case to consider since a manifold without boundary often occurs as a warped product over a manifold with boundary, and in this case we get some interesting new canonical examples. We also derive some new formulas involving curvatures which are analogous to those for the gradient Ricci solitons. As an application, we characterize warped product Einstein metrics when the base is locally conformally flat.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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