The Urysohn Sphere Is Oscillation Stable

The Urysohn Sphere Is Oscillation Stable
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Urysohn 球体振荡稳定

DOI:
10.1007/s00039-009-0007-5
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发表时间:
2007
影响因子:
2.2
通讯作者:
N. Sauer
N. Sauer
中科院分区:
数学1区
文献类型:
--
作者:
L. N. Thé;N. Sauer

文献摘要

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我们解决了Urysohn球面的振荡稳定性问题,这是Urysohn空间U中的一个类似于R12的失真问题。这是通过解决一个纯粹的组合问题,涉及一个家庭的可数超齐次度量空间与numerous距离。
We solve the oscillation stability problem for the Urysohn sphere, an analog of the distortion problem for ℓ2 in the context of the Urysohn space U. This is achieved by solving a purely combinatorial problem involving a family of countable ultrahomogeneous metric spaces with finitely many distances.