English

How likely can a point be in different Cantor sets

Dynamical Systems 2022-02-16 v2 Number Theory

Abstract

Let mN2m\in\mathbb N_{\ge 2}, and let K={Kλ:λ(0,1/m]}\mathcal K=\{K_\lambda: \lambda\in(0, 1/m]\} be a class of Cantor sets, where Kλ={i=1diλi:di{0,1,,m1},i1}K_{\lambda}=\{\sum_{i=1}^\infty d_i\lambda^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 K\mathcal K. More precisely, for a fixed point x(0,1)x\in(0,1) we consider the parameter set Λ(x)={λ(0,1/m]:xKλ}\Lambda(x)=\{\lambda\in(0,1/m]: x\in K_\lambda\}, and show that Λ(x)\Lambda(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)\Lambda(x) we prove that the intersection Λ(x)Λ(y)\Lambda(x)\cap\Lambda(y) also has full Hausdorff dimension for any x,y(0,1)x, y\in(0,1).

Keywords

Cite

@article{arxiv.2102.13264,
  title  = {How likely can a point be in different Cantor sets},
  author = {Kan Jiang and Derong Kong and Wenxia Li},
  journal= {arXiv preprint arXiv:2102.13264},
  year   = {2022}
}

Comments

29 pages, 5 figures. We added some statements in the abstract and the introduction

R2 v1 2026-06-23T23:31:55.595Z