Gromov hyperbolic spaces and the sharp isoperimetric constant

Gromov hyperbolic spaces and the sharp isoperimetric constant
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格罗莫夫双曲空间和锐等周常数

DOI:
10.1007/s00222-007-0084-8
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发表时间:
2006
影响因子:
3.1
通讯作者:
S. Wenger
S. Wenger
中科院分区:
数学1区
文献类型:
--
作者:
S. Wenger

文献摘要

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本文给出了一个二次等周不等式中的最大常数,它保证了测地度量空间是Gromov双曲的。作为一个特殊的结果,我们得到,欧几里德空间是一个边界的情况下,格罗莫夫双曲的等周函数。对于线性填充半径不等式,我们也证明了类似的结果。我们的结果加强和推广了Gromov,Papasoglu等人的定理。
In this article we exhibit the largest constant in a quadratic isoperimetric inequality which ensures that a geodesic metric space is Gromov hyperbolic. As a particular consequence we obtain that Euclidean space is a borderline case for Gromov hyperbolicity in terms of the isoperimetric function. We prove similar results for the linear filling radius inequality. Our results strengthen and generalize theorems of Gromov, Papasoglu and others.