English

The exceptional sets on the run-length function of beta-expansions

Dynamical Systems 2017-12-06 v1 Number Theory

Abstract

Let β>1\beta > 1 and the run-length function rn(x,β)r_n(x,\beta) be the maximal length of consecutive zeros amongst the first n digits in the β\beta-expansion of x[0,1]x\in[0,1]. The exceptional set Emaxφ={x[0,1]:lim infnrn(x,β)φ(n)=0,lim supnrn(x,β)φ(n)=+}E_{\max}^{\varphi}=\left\{x \in [0,1]:\liminf_{n\rightarrow \infty}\frac{r_n(x,\beta)}{\varphi(n)}=0, \limsup_{n\rightarrow \infty}\frac{r_n(x,\beta)}{\varphi(n)}=+\infty\right\} is investigated, where φ:NR+\varphi: \mathbb{N} \rightarrow \mathbb{R}^+ is a monotonically increasing function with limnφ(n)=+\lim\limits_{n\rightarrow \infty }\varphi(n)=+\infty. We prove that the set EmaxφE_{\max}^{\varphi} is either empty or of full Hausdorff dimension and residual in [0,1][0,1] according to the increasing rate of φ\varphi .

Keywords

Cite

@article{arxiv.1704.01317,
  title  = {The exceptional sets on the run-length function of beta-expansions},
  author = {Lixuan Zheng and Min Wu and Bing Li},
  journal= {arXiv preprint arXiv:1704.01317},
  year   = {2017}
}

Comments

18 pages

R2 v1 2026-06-22T19:08:09.846Z