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arXiv 1503.06343math.DG
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常曲率时空中Cauchy超曲面的渐近性

Asymptotic behavior of Cauchy hypersurfaces in constant curvature space-times

Mehdi Belraouti

摘要:

研究了极大整体双曲空间紧空间-倍常曲率上凸柯西超曲面的渐近性态。本文将文[11]的结果推广到(2+1)de Sitter和anti de Sitter情形。我们证明,在这些情况下,准凹时间的水平集收敛在Gromov等变拓扑,当时间为0,一个真正的树。此外,该极限不依赖于时间函数的选择。我们还考虑了平坦(n+1)维情形下的渐近行为问题。证明了在Gromov等变拓扑中,当时间趋于0时,拟凹时间的水平集收敛到CAT(0)度量空间.此外,该极限不依赖于时间函数的选择。

英文摘要:

We study the asymptotic behavior of convex Cauchy hypersurfaces on maximal globally hyperbolic spatially compact space-times of constant curvature. We generalise the result of [11] to the (2+1) de Sitter and anti de Sitter cases. We prove that in these cases the level sets of quasi-concave times converge in the Gromov equivariant topology, when time goes to 0, to a real tree. Moreover, this limit does not depend on the choice of the time function. We also consider the problem of asymptotic behavior in the flat (n+1) dimensional case. We prove that the level sets of quasi-concave times converge in the Gromov equivariant topology, when time goes to 0, to a CAT (0) metric space. Moreover, this limit does not depend on the choice of the time function.

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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