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For Cantor circle Julia sets of hyperbolic rational maps, we prove that they are quasisymmetrically equivalent to standard Cantor circles (i.e., connected components are round circles). This gives a quasisymmetric uniformization of all…

动力系统 · 数学 2021-01-26 Weiyuan Qiu , Fei Yang

It is shown that for quasiregular maps of positive lower order the Julia set coincides with the boundary of the fast escaping set.

动力系统 · 数学 2014-11-04 Walter Bergweiler , Alastair Fletcher , Daniel A. Nicks

There exist uniformly quasiregular maps $f:\mathbb{R}^3 \to \mathbb{R}^3$ whose Julia sets are wild Cantor sets.

动力系统 · 数学 2014-03-27 Alastair Fletcher , Jang-Mei Wu

In this article, we investigate the boundary of the escaping set I(f) for quasiregular mappings on R^n, both in the uniformly quasiregular case and in the polynomial type case. The aim is to show that the boundary of I(f) is the Julia set…

复变函数 · 数学 2009-09-02 Alastair Fletcher , Daniel A. Nicks

Sun Daochun and Yang Lo have shown that many results of the Fatou-Julia iteration theory of rational functions extend to quasiregular self-maps of the Riemann sphere for which the degree exceeds the dilatation. We show that in this context,…

动力系统 · 数学 2014-08-12 Walter Bergweiler

Let $f$ and $g$ be two quasiregular maps in $\mathbb{R}^d$ that are of transcendental type and also satisfy $f\circ g =g \circ f$. We show that if the fast escaping sets of those functions are contained in their respective Julia sets then…

动力系统 · 数学 2021-07-01 Athanasios Tsantaris

It is well-known that the Julia set of a hyperbolic rational map is quasisymmetrically equivalent to the standard Cantor set. Using the uniformization theorem of David and Semmes, this result comes down to the fact that such a Julia set is…

动力系统 · 数学 2020-10-27 Alastair N. Fletcher , Vyron Vellis

It is shown that the Hausdorff dimension of the fast escaping set of a quasiregular self-map of ${\mathbb R}^3$ can take any value in the interval $[1,3]$. The Hausdorff dimension of the Julia set of such a map is estimated under some…

动力系统 · 数学 2025-10-09 Walter Bergweiler , Athanasios Tsantaris

The Fatou-Julia iteration theory of rational functions has been extended to quasiregular mappings in higher dimension by various authors. The purpose of this paper is an analogous extension of the iteration theory of transcendental entire…

动力系统 · 数学 2014-11-04 Walter Bergweiler , Daniel A. Nicks

A theorem of Ritt states the a linearizer of a holomorphic function at a repelling fixed point is periodic only if the holomorphic map is conjugate to a power of $z$, a Chebyshev polynomial or a Latt\`es map. The converse, except for some…

动力系统 · 数学 2018-09-11 Alastair Fletcher , Doug Macclure

Let $f:\widehat{\mathbb{C}}\rightarrow \widehat{\mathbb{C}}$ be a hyperbolic rational map of degree $d \geq 2$, and let $J \subset \mathbb{C}$ be its Julia set. We prove that $J$ always has positive Fourier dimension. The case where $J$ is…

动力系统 · 数学 2022-09-21 Gaétan Leclerc

The Fatou-Julia theory for rational functions has been extended both to transcendental meromorphic functions and more recently to several different types of quasiregular mappings in higher dimensions. We extend the iterative theory to…

动力系统 · 数学 2018-05-04 Luke Warren

Many results of the Fatou-Julia iteration theory of rational functions extend to uniformly quasiregular maps in higher dimensions. We obtain results of this type for certain classes of quasiregular maps which are not uniformly quasiregular.

动力系统 · 数学 2013-02-12 Walter Bergweiler

A closed interval and circle are the only smooth Julia sets in polynomial dynamics. D. Ruelle proved that the Hausdorff dimension of unicritical Julia sets close to the circle depends analytically on the parameter. Near the tip of the…

动力系统 · 数学 2022-10-27 Neil Dobbs , Jacek Graczyk , Nicolae Mihalache

The object of the paper is to characterize gasket Julia sets of rational maps that can be uniformized by round gaskets. We restrict to rational maps without critical points on the Julia set. Under these conditions, we prove that a Julia set…

动力系统 · 数学 2024-11-27 Yusheng Luo , Dimitrios Ntalampekos

We prove that if $f$ and $g$ are postcritically finite rational maps whose Julia sets $\mathcal{J}(f), \mathcal{J}(g)$, respectively, are Sierpi\'nski carpets, and if $\xi$ is a quasiregular map of the Riemann sphere $\widehat{\mathbb{C}}$…

动力系统 · 数学 2026-01-29 Sergei Merenkov , Letian Shen

We show that a rational function $f$ of degree $>1$ on the projective line over an algebraically closed field that is complete with respect to a non-trivial and non-archimedean absolute value has no potentially good reductions if and only…

动力系统 · 数学 2020-11-03 Yûsuke Okuyama

We consider fiber-preserving complex dynamics on fiber bundles whose fibers are Riemann spheres and whose base spaces are compact metric spaces. In this context, without any assumption on (semi-)hyperbolicity, we show that the fiberwise…

动力系统 · 数学 2007-05-23 Hiroki Sumi

We show that if the growth of a transcendental entire function f is sufficiently regular, then the Julia set and the escaping set of f have Hausdorff dimension 2.

动力系统 · 数学 2010-06-22 Walter Bergweiler , Bogusława Karpińska

The Fatou-Julia iteration theory of rational and transcendental entire functions has recently been extended to quasiregular maps in more than two real dimensions. Our goal in this paper is similar; we extend the iteration theory of analytic…

动力系统 · 数学 2019-04-12 Daniel A. Nicks , David J. Sixsmith
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