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arXiv 1906.02555math.MGmath.DSmath.PR
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某些随机结构的Assouad谱阈值

Assouad spectrum thresholds for some random constructions

Sascha Troscheit

摘要:

度量空间的Assouad维数决定了它的极值标度性质。衍生的概念的Assouad频谱固定相对尺度的缩放函数,以获得准Assouad和盒计数尺寸之间的插值行为。虽然准Assouad和Assouad维度经常一致,但它们通常在随机结构中不同。在本文中,我们考虑一个广义Assouad频谱之间的准Assouad的Assouad维插值。对于常见的随机分形集的模型,我们得到一个二分法的行为,通过找到一个门限函数准Assouad行为过渡到Assouad维。这个阈值可以被认为是一个相变,我们计算的高尔顿-沃森树和一个变量的随机自相似和自仿射结构的Gromov边界的阈值。我们描述了如何随机自相似模型可以从高尔顿-沃森树的结果。

英文摘要:

The Assouad dimension of a metric space determines its extremal scaling properties. The derived notion of the Assouad spectrum fixes relative scales by a scaling function to obtain interpolation behaviour between the quasi-Assouad and box-counting dimensions. While the quasi-Assouad and Assouad dimensions often coincide, they generally differ in random constructions. In this paper we consider a generalised Assouad spectrum that interpolates between the quasi-Assouad to the Assouad dimension. For common models of random fractal sets we obtain a dichotomy of its behaviour by finding a threshold function where the quasi-Assouad behaviour transitions to the Assouad dimension. This threshold can be considered a phase transition and we compute the threshold for the Gromov boundary of Galton-Watson trees and one-variable random self-similar and self-affine constructions. We describe how the stochastically self-similar model can be derived from the Galton-Watson tree result.

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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