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arXiv 2102.13264math.DSmath.NT
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一个点在不同康托集中的可能性有多大

How likely can a point be in different Cantor sets

Kan Jiang, Derong Kong, Wenxia Li

摘要:

设$m\in\mathbb N_{\ge 2}$,$\mathcal K=\{K_λ: λ\in(0, 1/m]\}$是一类康托集,其中$K_λ=\{\sum_{i=1}^\infty d_iλ^i: d_i\in\{0,1,\ldots, m-1\}, i\ge 1\}$ .本文研究了$\mathcal K$的Cantor集上不动点的似然性.更精确地说,对于不动点$x\in(0,1)$,我们考虑参数集$Λ(x)=\{λ\in(0,1/m]: x\in K_λ\}$,并证明了$Λ(x)$是一个具有零Lebesgue测度和全豪斯多夫维数的拓扑Cantor集。进一步,通过构造$Λ(x)$中具有大厚度的Cantor子集序列,证明了对于任何$x, y\in(0,1)$,交$Λ(x)\capΛ(y)$也具有满豪斯多夫维数.

英文摘要:

Let $m\in\mathbb N_{\ge 2}$, and let $\mathcal K=\{K_λ: λ\in(0, 1/m]\}$ be a class of Cantor sets, where $K_λ=\{\sum_{i=1}^\infty d_iλ^i: d_i\in\{0,1,\ldots, m-1\}, i\ge 1\}$. We investigate in this paper the likelyhood of a fixed point in the Cantor sets of $\mathcal K$. More precisely, for a fixed point $x\in(0,1)$ we consider the parameter set $Λ(x)=\{λ\in(0,1/m]: x\in K_λ\}$, and show that $Λ(x)$ is a topological Cantor set having zero Lebesgue measure and full Hausdorff dimension. Furthermore, by constructing a sequence of Cantor subsets with large thickness in $Λ(x)$ we prove that the intersection $Λ(x)\capΛ(y)$ also has full Hausdorff dimension for any $x, y\in(0,1)$.

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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