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arXiv 2407.08404math.DSmath.MG
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非均匀吸引子与盒维数

Inhomogeneous attractors and box dimension

Jonathan M. Fraser

AI总结:

本文为综述性研究,围绕Barnsley和Demko提出的非均匀吸引子模型,探讨其维数理论,重点分析上盒维数的估计方法及估计的精确性边界,并给出相关实例与开放问题。

摘要:

迭代函数系统(IFS)是构建具有某种“近似自相似性”的分形集实例的最重要工具之一,相关例子包括自相似集、自仿射集等。1985年,Barnsley和Demko提出了标准IFS模型的一个精妙变体:通过取一个固定紧凝聚集在给定标准IFS作用下的轨道的闭包,来构造非均匀吸引子。在这篇综述性文章中,我将讨论非均匀吸引子的维数理论,给出若干例子及一些未解决的问题。我将聚焦于上盒维数,重点阐述如何推导良好的估计,以及这些估计何时无法达到精确。

英文摘要:

Iterated function systems (IFSs) are one of the most important tools for building examples of fractal sets exhibiting some kind of `approximate self-similarity'. Examples include self-similar sets, self-affine sets etc. A beautiful variant on the standard IFS model was introduced by Barnsley and Demko in 1985 where one builds an \emph{inhomogeneous} attractor by taking the closure of the orbit of a fixed compact condensation set under a given standard IFS. In this expository article I will discuss the dimension theory of inhomogeneous attractors, giving several examples and some open questions. I will focus on the upper box dimension with emphasis on how to derive good estimates, and when these estimates fail to be sharp.

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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