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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

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

The fast escaping set of a transcendental entire function is the set of all points which tend to infinity under iteration as fast as compatible with the growth of the function. We study the analogous set for quasiregular mappings in higher…

动力系统 · 数学 2014-08-12 Walter Bergweiler , David Drasin , Alastair Fletcher

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

It is well-known that the Julia set J(f) of a rational map is uniformly perfect; that is, every ring domain which separates J(f) has bounded modulus, with the bound depending only on f. In this article we prove that an analogous result is…

动力系统 · 数学 2015-05-20 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

This article concerns the iteration of quasiregular mappings on $\mathbb{R}^d$ and entire functions on $\mathbb{C}$. It is shown that there are always points at which the iterates of a quasiregular map tend to infinity at a controlled rate.…

动力系统 · 数学 2015-11-06 Daniel A. Nicks

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 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

We show that if the maximum modulus of a quasiregular mapping f grows sufficiently rapidly then there exists a non-empty escaping set I(f) consisting of points whose forward orbits under iteration tend to infinity. This set I(f) has an…

复变函数 · 数学 2009-01-17 Walter Bergweiler , Alastair Fletcher , Jim Langley , Janis Meyer

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

This paper studies quasiconformal non-equivalence of Julia sets and limit sets. We proved that any Julia set is quasiconformally different from the Apollonian gasket. We also proved that any Julia set of a quadratic rational map is…

动力系统 · 数学 2025-10-14 Yusheng Luo , Yongquan Zhang

We construct a quasiregular mapping in $\mathbb{R}^3$ that is the first to illustrate several important dynamical properties: the quasi-Fatou set contains wandering components; these quasi-Fatou components are bounded and hollow; and the…

复变函数 · 数学 2025-03-19 Jack Burkart , Alastair N. Fletcher , Daniel A. Nicks

We extend results about the dimension of the radial Julia set of certain exponential functions to quasiregular Zorich maps in higher dimensions. Our results improve on previous estimates of the dimension also in the special case of…

动力系统 · 数学 2022-03-08 Walter Bergweiler , Jie Ding

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

Following the ideas of A.~Douady, we give an alternative proof of the authors' result: for any boundary point $c_0$ of the Mandelbrot set $M$, we can find small quasiconformal copies of $M$ in $M$ that are encaged in nested quasiconformal…

动力系统 · 数学 2025-10-02 Tomoki Kawahira , Masashi Kisaka

We study the different rates of escape of points under iteration by holomorphic self-maps of $\mathbb C^*=\mathbb C\setminus\{ 0\}$ for which both 0 and $\infty$ are essential singularities. Using annular covering lemmas we construct…

动力系统 · 数学 2018-06-20 David Martí-Pete

This paper is a continuation of authors work: Fatou and Julia like sets,Ukranian J. Math., to appear/arXiv:2006.08308[math.CV](see [4]). Here, we introduce escaping like set and generalized escaping like set for a family of holomorphic…

复变函数 · 数学 2020-06-17 Kuldeep Singh Charak , Anil Singh , Manish Kumar

We give explicit examples of pairs of Julia sets of hyperbolic rational maps which are homeomorphic but not quasisymmetrically homeomorphic.

动力系统 · 数学 2013-02-11 Peter Haissinsky , Kevin M. Pilgrim

We show that for any quasimeromorphic mapping with an essential singularity at infinity, there exist points whose iterates tend to infinity arbitrarily slowly. This extends a result by Nicks for quasiregular mappings, and Rippon and…

动力系统 · 数学 2021-07-01 Luke Warren
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