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arXiv 1603.04201math.AP
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极限Carleman权存在的充分条件

Sufficient conditions for the existence of limiting Carleman weights

Pablo Angulo-Ardoy, Daniel Faraco, Luis Guijarro

摘要:

在https://arxiv.org/abs/1411.4887中,我们基于维度$3$中的Cotton-York张量和维度$4$中的Weyl张量,找到了黎曼流形允许局部极限Carleman权(LCW)的一些必要条件。在本文中,我们发现进一步的必要条件存在的局部LCW往往是充分的。对于维数为$3$或$4$的流形,我们对可能的Cotton-York或Weyl张量进行了分类,并提供了一种机制来找出流形是否允许每种类型的张量的局部LCW。特别是,我们表明,产品的两个表面承认一个LCW当且仅当至少有一个的两个表面是革命。这提供了满足\cite{AFGR}的特征标志条件但不允许$LCW$的流形的示例。

英文摘要:

In https://arxiv.org/abs/1411.4887, we found some necessary conditions for a Riemannian manifold to admit a local limiting Carleman weight (LCW), based upon the Cotton-York tensor in dimension $3$ and the Weyl tensor in dimension $4$. In this paper, we find further necessary conditions for the existence of local LCWs that are often sufficient. For a manifold of dimension $3$ or $4$, we classify the possible Cotton-York, or Weyl tensors, and provide a mechanism to find out whether the manifold admits local LCW for each type of tensor. In particular, we show that a product of two surfaces admits a LCW if and only if at least one of the two surfaces is of revolution. This provides an example of a manifold satisfying the eigenflag condition of \cite{AFGR} but not admitting $LCW$.

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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