English

Approximating elements of the middle third Cantor set with dyadic rationals

Number Theory 2022-04-22 v2 Dynamical Systems

Abstract

Let CC be the middle third Cantor set and μ\mu be the log2log3\frac{\log 2}{\log 3}-dimensional Hausdorff measure restricted to CC. In this paper we study approximations of elements of CC by dyadic rationals. Our main result implies that for μ\mu almost every xCx\in C we have #{1nN:xp2n1n0.012n for some pN}2n=1Nn0.01.\#\left\{1\leq n\leq N:\left|x-\frac{p}{2^n}\right| \leq \frac{1}{n^{0.01}\cdot 2^{n}}\textrm{ for some }p\in\mathbb{N}\right\}\sim 2\sum_{n=1}^{N}n^{-0.01}. This improves upon a recent result of Allen, Chow, and Yu which gives a sub-logarithmic improvement over the trivial approximation rate.

Keywords

Cite

@article{arxiv.2203.12477,
  title  = {Approximating elements of the middle third Cantor set with dyadic rationals},
  author = {Simon Baker},
  journal= {arXiv preprint arXiv:2203.12477},
  year   = {2022}
}
R2 v1 2026-06-24T10:23:30.467Z