arXiv subjects

Yingqing Xiao

Publications and source records attributed to Yingqing Xiao.

11 recordsLinked to original sources

arXiv2026

Rational maps with Cantor bubble Julia sets

It has been shown that Cantor bubble Julia sets can appear in the dynamics of polynomials and their singular perturbations. In this paper, we present a criterion that guarantees the existence of Cantor bubble Julia sets for certain rational maps with attracting or parabolic fixed points. Moreover, we construct other Cantor bubble Julia sets, including those with high-periodic attracting cycles and those with Hausdorff dimension two. Finally, we give a sufficient condition for Cantor bubble Julia sets to be quasisymmetrically equivalent to Cantor round bubbles.

math.DS↗

arXiv2025

Rational maps whose Julia sets are generalized Sierpiński gaskets

It has been shown that the Sierpiński gasket-like sets can appear as the Julia sets of some geometrically finite rational maps. In this paper we prove that such type of Julia sets can also appear in the rational maps containing Siegel disks, Cremer points or which are infinitely renormalizable. Based on this, we prove the existence of gasket Julia sets with positive area. Moreover, we present a criterion which guarantees the existence of gasket Julia sets in some rational maps having exactly one fixed attracting or parabolic basin.

math.DS↗

arXiv2025

On the Metric Dimension of Generalized Petersen Graphs $P(n,3)$

The metric dimension of a graph $G$ is defined as the minimum number of vertices in a subset $S\subset V(G)$ such that all other vertices are uniquely determined by their distances to the vertices in $S$, and is denoted by $\dim(G)$. In this paper, we study the metric dimension of generalized Petersen graphs $P(n,3)$. The notions of good and bad vertices, which are introduced in Imran et al. (2014, Ars. Combinatoria 117, 113-130), are instrumental in determining the lower bound of the metric dimension for certain types of graphs. We propose an approach, based on these notions, to determine the lower bound of $\dim(P(n,3))$. Moreover, we shall prove that $\dim(P(n,3))=4$, where $n\equiv2,3,4,5 \,\,(\text{mod}\,\, 6)$ and is sufficiently large.

math.CO↗

arXiv2024

Integer tile and Spectrality of Cantor-Moran measures with equidifferent digit sets

Let $\left\{b_{k}\right\}_{k=1}^{\infty}$ be a sequence of integers with $|b_{k}|\geq2$ and $\left\{D_{k}\right\}_{k=1}^{\infty} $ be a sequence of equidifferent digit sets with $D_{k}=\left\{0,1, \cdots, N-1\right\}t_{k},$ where $N\geq2$ is a prime number and $\{t_{k}\}_{k=1}^{\infty}$ is bounded. In this paper, we study the existence of the Cantor-Moran measure $μ_{\{b_k\},\{D_k\}}$ and show that $$\mathbf{D}_k:=D_k\oplus b_{k} D_{k-1}\oplus b_{k}b_{k-1} D_{k-2}\oplus\cdots\oplus b_{k}b_{k-1}\cdots b_2D_{1}$$ is an integer tile for all $k\in\mathbb{N}^+$ if and only if $\mathbf{s}_i\neq\mathbf{s}_j$ for all $i\neq j\in\mathbb{N}^{+}$, where $\mathbf{s}_i$ is defined as the numbers of factor $N$ in $\frac{b_1b_2\cdots b_i}{Nt_i}$. Moreover, we prove that $\mathbf{D}_k$ being an integer tile for all $k\in\mathbb{N}^+$ is a necessary condition for the Cantor-Moran measure to be a spectral measure, and we provide an example to demonstrate that it cannot become a sufficient condition. Furthermore, under some additional assumptions, we establish that the Cantor-Moran measure to be a spectral measure is equivalent to $\mathbf{D}_k$ being an integer tile for all $k\in\mathbb{N}^+$.

math.NT↗

arXiv2024

On the spectrality of a class of Moran measures

In this paper, we study the spectrality of a class of Moran measures $μ_{\mathcal{P},\mathcal{D}}$ on $\mathbb{R}$ generated by $\{(p_n,\mathcal{D}_n)\}_{n=1}^{\infty}$, where $\mathcal{P}=\{p_n\}_{n=1}^{\infty}$ is a sequence of positive integers with $p_n>1$ and $\mathcal{D}=\{\mathcal{D}_{n}\}_{n=1}^{\infty}$ is a sequence of digit sets of $\mathbb{N}$ with the cardinality $\#\mathcal{D}_{n}\in \{2,3,N_{n}\}$. We find a countable set $Λ\subset\mathbb{R}$ such that the set $\{e^{-2πi λx}|λ\inΛ\}$ is a orthonormal basis of $L^{2}(μ_{\mathcal{P},\mathcal{D}})$ under some conditions. As an application, we show that when $μ_{\mathcal{P},\mathcal{D}}$ is absolutely continuous, $μ_{\mathcal{P},\mathcal{D}}$ not only is a spectral measure, but also its support set tiles $\mathbb{R}$ with $\mathbb{Z}$.

math.CA↗

arXiv2022

Spectrality of a class of infinite convolutions on $\mathbb{R}$

Given an integer $m\geq1$. Let $Σ^{(m)}=\{1,2, \cdots, m\}^{\mathbb{N}}$ be a symbolic space, and let $\{(b_{k},D_{k})\}_{k=1}^{m}:=\{(b_{k}, \{0,1,\cdots, p_{k}-1\}t_{k}) \}_{k=1}^{m}$ be a finite sequence pairs, where integers $| b_{k}| $, $p_{k}\geq2$, $|t_{k}|\geq 1$ and $ p_{k},t_{1},t_{2}, \cdots, t_{m}$ are pairwise coprime integers for all $1\leq k\leq m$. In this paper, we show that for any infinite word $σ=\left(σ_{n}\right)_{n=1}^{\infty}\inΣ^{(m)}$, the infinite convolution $$ μ_σ=δ_{b_{σ_{1}}^{-1} D_{σ_{1}}} * δ_{\left(b_{σ_{1}} b_{σ_{2}}\right)^{-1} D_{σ_{2}}} * δ_{\left(b_{σ_{1}} b_{σ_{2}} b_{σ_{3}}\right)^{-1}D_{σ_{3}}} * \cdots $$ is a spectral measure if and only if $p_{σ_n}\mid b_{σ_n}$ for all $n\geq2$ and $σ\notin \bigcup_{l=1}^\infty\prod_{l}$, where $\prod_{l}=\{i_{1}i_{2}\cdots i_{l}j^{\infty}\inΣ^{(m)}: i_{l}\neq j, |b_{j}|=p_{j}, |t_{j}|\neq1\}$.

math.CA↗

arXiv2018

On the quasisymmetric minimality of homogeneous perfect sets

Z. Wen and J. Wu introduced the notion of homogeneous perfect sets as a generalization of Cantor type sets and determined their exact Hausdorff dimension based on the length of their fundamental intervals and the gaps between them. In this paper, we considered the minimality of the homogeneous perfect sets with Hausdorff dimension 1 and proved they are 1-dimensional quasisymmetrically minimal under some conditions.

math.MG↗

arXiv2018

Three strongly hyperbolic metrics on ptolemy spaces

Recently, strongly hyperbolic space as certain analytic enhancements of Gromov hyperbolic space was introduced by B. Nica and J. Spakula. In this note, we prove that the log-metric log(1+d) on a Ptolemy space (X,d) is a strongly hyperbolic metric. Using our result, we construct three metrics on a Ptolemy metric space and prove they are strongly hyperbolic.

math.MG↗

arXiv2016

Singular perturbations with multiple poles of the simple polynomials

In this article, we study the dynamics of the following family of rational maps with one parameter: \begin{equation*} f_λ(z)= z^n+\frac{λ^2}{z^n-λ}, \end{equation*} where $n\geq 3$ and $λ\in\mathbb{C}^*$. This family of rational maps can be viewed as a singular perturbations of the simple polynomial $P_n(z)=z^n$. We give a characterization of the topological properties of the Julia sets of the family $f_λ$ according to the dynamical behaviors of the orbits of the free critical points.

math.DS↗

arXiv2015

On the Hyperbolizing metric spaces

In this paper, we prove that the metric space $(Z\setminus M,u_Z)$ defined by Z.Ibragimov is asymptotically $PT_{-1}$ if the metric space $(Z,d)$ is $PT_{0}$, where $M$ is a nonempty closed proper subset of $Z$. Secondly, based on the metric $u_Z$, we define a new kind of metric $k_{z}$ on the set $Z\setminus M$ and show that the new metric space $(Z\setminus M,k_{Z})$ is also asymptotically $PT_{-1}$ without the assumption of $PT_{0}$ on the metric space $(Z,d)$.

math.MG↗

arXiv2010

Quasisymmetrically minimal homogeneous perfect sets

In \cite{ZW}, the notion of homogenous perfect set as a generalization of Cantor type sets is introduced. Their Hausdorff, lower box-counting, upper box-counting and packing dimensions are studied in \cite{ZW} and \cite{WW}. In this paper, we show that the homogenous perfect set be minimal for 1-dimensional quasisymmetric maps, which generalize the conclusion in \cite{MS} about the uniform Cantor cantor set to the homogenous perfect set.

math.CV↗