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A winning approach to the intersections of twisted non-recurrent sets with fractals

Dynamical Systems 2025-12-09 v1

Abstract

In this paper, we prove that if SRdS\subseteq\mathbb{R}^d is hyperplane absolute winning on a closed hyperplane diffuse set LRdL\subseteq\mathbb{R}^d, then dimHSK=dimHK\mathrm{dim}_H S\cap K=\mathrm{dim}_H K for any irreducible self-conformal set KLK\subseteq L without assuming any separation condition on KK. The result is then applied to obtain the Hausdorff dimension of intersections between irreducible self-conformal sets and twisted non-recurrent sets N(T,G)\mathrm{N}(T,\mathcal{G}) defined as N(T,G):={x[0,1]d:lim infnTn(x)gn(x)>0}, \mathrm{N}(T,\mathcal{G}):=\left\{\mathbf{x}\in[0,1]^d:\liminf_{n\to\infty}\|T^n(\mathbf{x})-g_n(\mathbf{x})\|>0\right\}, where T:[0,1]d[0,1]dT:[0,1]^d\to[0,1]^d belongs to a broad class of product maps, G:={gn}nN\mathcal{G}:=\{g_n\}_{n\in\mathbb{N}} is a sequence of self-maps on [0,1]d[0,1]^d with uniform Lipschitz constant and \|\cdot\| denotes the maximal norm in Rd\mathbb{R}^d. When TT is the β\beta-transformation on [0,1][0,1], it provides a positive answer to a question raised informally by Broderick, Bugeaud, Fishman, Kleinbock and Weiss (Math. Res. Lett., 2010). For the case TT is a d×dd\times d diagonal matrix transformations, our results provide a partial answer asked in a paper of Li, Liao, Velani and Zorin (Adv. Math., 2023). A natural generalization to non-autonomous setting is also obtained.

Keywords

Cite

@article{arxiv.2512.07686,
  title  = {A winning approach to the intersections of twisted non-recurrent sets with fractals},
  author = {Junjie Huang and Bing Li and Bo Wang and Na Yuan},
  journal= {arXiv preprint arXiv:2512.07686},
  year   = {2025}
}

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30 pages