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arXiv 2006.01611math.DG
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分段正曲率张量允许一个度量张量,在这个度量张量下,它们是爱因斯坦的

Sectionally positive curvature tensors admit a metric tensor under which they are Einstein

Dan Gregorian Fodor

摘要:

设$n \geq 3$和$R_{abcd}$是$(4,0)$截面正曲率型张量(具有$(4,0)$曲率张量的所有局部对称性的张量)。则存在度量张量$g_{ab}$使得对于某个$λ$有$R_{abcd}\; g^{bd} = g_{ac} λ$.此外,$g_{ab}$是唯一的,直到常数因子。

英文摘要:

Let $n \geq 3$ and $R_{abcd}$ be a $(4,0)$ sectionally positive curvature-type tensor (a tensor possessing all the local symmetries of the $(4,0)$ curvature tensor). Then there exists a metric tensor $g_{ab}$ such that $R_{abcd}\; g^{bd} = g_{ac} λ$ for some $λ$. Furthermore, $g_{ab}$ is unique up to a constant factor.

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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