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Koebe uniformization is a fundemental problem in complex analysis. In this paper, we use transboundary extremal length to show that every nondegenerate and uncountably connected domain with bounded gap-ratio is conformally homeomorphic to a…

Complex Variables · Mathematics 2024-08-08 Yi Zhong

We study the method of finding conformal maps onto circle domains by approximating with finitely connected subdomains. Every domain $D \subset \hat{C}$ admits exhaustions, i.e., increasing sequences of finitely connected subdomains $D_j$…

Complex Variables · Mathematics 2021-11-02 Kai Rajala

We study a quasisymmetric version of the classical Koebe uniformization theorem in the context of Ahlfors regular metric surfaces. In particular, we prove that an Ahlfors 2-regular metric surface X homeomorphic to a finitely connected…

Metric Geometry · Mathematics 2011-09-16 Sergei Merenkov , Kevin Wildrick

Let $f$ be a rational map with an infinitely-connected fixed parabolic Fatou domain $U$. We prove that there exists a rational map $g$ with a completely invariant parabolic Fatou domain $V$, such that $(f,U)$ and $(g,V)$ are conformally…

Dynamical Systems · Mathematics 2025-09-15 Ning Gao , Yan Gao , Wenjuan Peng

We analyze the boundaries of multiply connected Fatou components of transcendental maps by means of universal covering maps and associated inner functions. A unified approach is presented, which includes invariant Fatou components (of any…

Dynamical Systems · Mathematics 2025-10-13 Gustavo R. Ferreira , Anna Jové

We consider rational surface automorphisms with positive entropy. A Fatou component is said to be a rotation domain if the automorphism induces a torus action on it. Here we construct a rational surface automorphism with positive entropy…

Dynamical Systems · Mathematics 2009-07-21 Eric Bedford , Kyounghee Kim

If $R$ is a rational map, the Main Result is a uniformization Theorem for the space of decompositions of the iterates of $R$. Secondly, we show that Fatou conjecture holds for decomposable rational maps.

Dynamical Systems · Mathematics 2011-07-01 Carlos Cabrera , Peter Makienko

In this paper, we study hyperbolic rational maps with finitely connected Fatou sets. We construct models of post-critically finite hyperbolic tree mapping schemes for such maps, generalizing post-critically finite rational maps in the case…

Dynamical Systems · Mathematics 2022-03-03 Yusheng Luo

We present sufficient conditions so that a conformal map between planar domains whose boundary components are Jordan curves or points has a continuous or homeomorphic extension to the closures of the domains. Our conditions involve the…

Complex Variables · Mathematics 2023-08-03 Dimitrios Ntalampekos

Let $U$ be a multiply connected domain of the Riemann sphere $\hat{C}$ whose complement $\hat{C}\setminus U$ has $N<\infty$ components. We show that every conformal map on $U$ can be written as a composition of $N$ maps conformal on simply…

Complex Variables · Mathematics 2011-07-05 Benjamin Doyon

Using quasiconformal mappings, we prove that any Riemann surface of finite connectivity and finite genus is conformally equivalent to an intrinsic circle domain U in a compact Riemann surface S. This means that each connected component B of…

Complex Variables · Mathematics 2013-11-05 Edward Crane

We prove that a holomorphic fixed point germ in two complex variables, tangent to the identity, and whose only characteristic direction is non-degenerate, has a domain of attraction on which the map is conjugate to a translation. In the…

Dynamical Systems · Mathematics 2015-01-05 Sara Lapan

Koebe's conjecture asserts that every domain in the Riemann sphere is conformally equivalent to a circle domain. We prove that every domain $\Omega$ satisfying Koebe's conjecture admits an exhaustion, i.e., a sequence of interior…

Complex Variables · Mathematics 2025-08-26 Dimitrios Ntalampekos , Kai Rajala

In this survey we present the history and recent progress on several fundamental (quasi)conformal uniformization problems in the complex plane. Uniformization refers to the process of mapping a space to a canonical model by means of a…

Complex Variables · Mathematics 2026-03-17 Dimitrios Ntalampekos

It is a classical result in complex dynamics of one variable that the Fatou set for a critically finite map on $\mathbf{P}^1$ consists of only basins of attraction for superattracting periodic points. In this paper we deal with critically…

Dynamical Systems · Mathematics 2007-05-23 Feng Rong

We show that, given a non-degenerate, finitely connected domain $D$, its boundary, and the number of its boundary components, it is possible to compute a conformal mapping of $D$ onto a circular domain \emph{without} prior knowledge of the…

Complex Variables · Mathematics 2013-07-25 Valentin V. Andreev , Dale Daniel , Timothy H. McNicholl

Approximation theory of entire functions has been used to demonstrate the construction of a map on $\mathbb{C}\times\mathbb{R}$ having wandering domains. We also present suitable modification to this construction that helps in obtaining…

Complex Variables · Mathematics 2022-09-16 Ramanpreet Kaur

In this paper we extend the study of total graphs $\tau(R)$ to non-commutative finite rings $R$. We prove that $\tau(R)$ is connected if and only if $R$ is not local and we see that in that case $\tau(R)$ is always Hamiltonian. We also find…

Rings and Algebras · Mathematics 2014-01-10 David Dolžan , Polona Oblak

We study the behaviour of a transcendental entire map $ f\colon \mathbb{C}\to\mathbb{C} $ on an unbounded invariant Fatou component $ U $, assuming that infinity is accessible from $ U $. It is well-known that $ U $ is simply connected.…

Dynamical Systems · Mathematics 2024-06-17 Anna Jové , Núria Fagella

We prove local connectivity of the boundaries of invariant simply connected attracting basins for a class of transcendental meromorphic maps. The maps within this class need not be geometrically finite or in class $\mathcal B$, and the…

Dynamical Systems · Mathematics 2024-06-14 Krzystof Barański , Núria Fagella , Xavier Jarque , Bogusława Karpińska
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