arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.01595math.PRmath.CAmath.DS
收藏

均匀随机覆盖问题

Uniform random covering problems

Henna Koivusalo, Lingmin Liao, Tomas Persson

摘要:

受随机覆盖问题和Dirichlet一致逼近数研究的启发,本文研究了一致随机覆盖问题。准确地说,考虑一个i.i.d.序列$\mathbb{T}$和具有极限$0$的正实数序列$(r_n)_{n\geq 1}$。研究了随机集\[ \mathcal U (ω):=\{y\in \mathbb{T}: \ \forall N\gg 1, \ \exists n \leq N, \ \text{s.t.} \ \| ω_n -y \| < r_N \}. \]的大小,给出了$\mathcal U(ω)$几乎必然是全勒贝格测度的全空间或可数的几个充分条件.在$\mathcal U(ω)$是Lebesgue零测度集的情况下,给出了豪斯多夫维数的上下界估计.

英文摘要:

Motivated by the random covering problem and the study of Dirichlet uniform approximable numbers, we investigate the uniform random covering problem. Precisely, consider an i.i.d. sequence $ω=(ω_n)_{n\geq 1}$ uniformly distributed on the unit circle $\mathbb{T}$ and a sequence $(r_n)_{n\geq 1}$ of positive real numbers with limit $0$. We investigate the size of the random set \[ \mathcal U (ω):=\{y\in \mathbb{T}: \ \forall N\gg 1, \ \exists n \leq N, \ \text{s.t.} \ \| ω_n -y \| < r_N \}. \] Some sufficient conditions for $\mathcal U(ω)$ to be almost surely the whole space, of full Lebesgue measure, or countable, are given. In the case that $\mathcal U(ω)$ is a Lebesgue null measure set, we provide some estimations for the upper and lower bounds of Hausdorff dimension.

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。

↑