Characterizations of metric trees and Gromov hyperbolic spaces

Characterizations of metric trees and Gromov hyperbolic spaces
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度量树和格罗莫夫双曲空间的特征

DOI:
10.4310/mrl.2008.v15.n5.a14
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发表时间:
2006
影响因子:
1
通讯作者:
S. Wenger
S. Wenger
中科院分区:
数学3区
文献类型:
--
作者:
S. Wenger

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本文给出了度量树和Gromov双曲空间的新刻画,推广了Chatterji和Niblo的最近结果。我们的结果具有纯粹的度量性质,然而,他们的证明涉及两个经典的工具,从分析:斯托克斯公式在$\R^2 $和Rademacher型微分定理的Lipschitz映射。
In this note we give new characterizations of metric trees and Gromov hyperbolic spaces and generalize recent results of Chatterji and Niblo. Our results have a purely metric character, however, their proofs involve two classical tools from analysis: Stokes' formula in $\R^2$ and a Rademacher type differentiation theorem for Lipschitz maps.