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We give a lower bound of the hyperbolic and the Hausdorff dimension of the Julia set of meromorphic functions of finite order under very general conditions.

动力系统 · 数学 2007-05-23 Volker Mayer

The M\"obius metric $\delta_G$ is studied in the cases where its domain $G$ is an open sector of the complex plane. We introduce upper and lower bounds for this metric in terms of the hyperbolic metric and the angle of the sector, and then…

度量几何 · 数学 2023-03-16 Oona Rainio , Matti Vuorinen

In this paper, we study meromorphic functions on a domain $\Omega \subset \mathbb{C}$ whose image has finite spherical area, counted with multiplicity. The paper is composed of two parts. In the first part, we show that the limit of a…

复变函数 · 数学 2022-11-03 Oleg Ivrii

We give a diameter bound for fundamental domains for isometric actions of the fundamental group of a closed hyperbolic surface on a delta-hyperbolic space, where the bound depends on the hyperbolicity constant delta, the genus of the…

群论 · 数学 2012-07-10 Josh Barnard

In this note it is shown that two key results on transcendental singularities for meromorphic functions of finite lower order have refinements which hold under the weaker hypothesis that the logarithmic derivative has finite lower order.

复变函数 · 数学 2018-07-26 J. K. Langley

In this paper we derive explicit estimates for the functions which appear in the previous work of Bridgeman and Kahn. As a consequence, we obtain an explicit lower bound for the length of the shortest orthogeodesic in terms of the volume of…

几何拓扑 · 数学 2022-09-07 Mikhail Belolipetsky , Martin Bridgeman

Let $M$ be a complex manifold which admits an exhaustion by open subsets $M_j$ each of which is biholomorphic to a fixed domain $\Omega \subset \mathbb C^n$. The main question addressed here is to describe $M$ in terms of $\Omega$. Building…

复变函数 · 数学 2021-08-10 G. P. Balakumar , Diganta Borah , Prachi Mahajan , Kaushal Verma

In this paper we derive an explicit lower bound on the volume of a hyperbolic $n$-orbifold for dimensions greater than or equal to four. Our main tool is H. C. Wang's bound on the radius of a ball embedded in the fundamental domain of a…

几何拓扑 · 数学 2014-10-01 Ilesanmi Adeboye , Guofang Wei

We show that if a meromorphic function has a direct singularity over infinity, then the escaping set has an unbounded component and the intersection of the escaping set with the Julia set contains continua. This intersection has an…

复变函数 · 数学 2008-09-28 Walter Bergweiler , Philip J. Rippon , Gwyneth M. Stallard

Dimensions of level sets of generic continuous functions and generic H\"older functions defined on a fractal $F$ encode information about the geometry, ``the thickness" of $F$. While in the continuous case this quantity is related to a…

经典分析与常微分方程 · 数学 2024-10-10 Zoltán Buczolich , Balázs Maga , Gáspár Vértesy

In this paper, we will consider subfractals of hyperbolic iterated function systems which satisfy the open set condition. The subfractals will consist of points associated with infinite strings from a subshift of finite type or sofic…

动力系统 · 数学 2016-01-20 Elizabeth Sattler

Suppose that a function $F$ is meromorphic in the domain $\mathbb H(-m) = \{ z : \mathrm{Im}\, z > -m(\mathrm{Re}\, z) \}$, where $m$ is an even, positive, and continuous function that does not increase on $\mathbb R_{\ge 0}$, and suppose…

复变函数 · 数学 2026-04-08 Alexandre Eremenko , Aleksei Kulikov , Mikhail Sodin

We prove a Closing Lemma for nonuniformly hyperbolic measures of meromorphic maps. We prove also a theorem of approximation of the dynamics of such measures by Bernoulli coding maps.

动力系统 · 数学 2015-09-28 Henry De Thelin , Franck Nguyen Van Sang

Let $G$ be a nonempty bounded domain in a finite-dimensional Euclidean space. The main results are general estimates from below at points from $G$ for an arbitrary subharmonic function $u\not\equiv -\infty$ on the closure of the domain $G$…

复变函数 · 数学 2021-10-26 B. N. Khabibullin , E. U. Taipova

We explore the horofunction compactification of complete hyperbolic domains in complex Euclidean space equipped with the Kobayashi distance. We provide a sufficient condition under which, given a domain $\Omega$ as above, the identity map…

复变函数 · 数学 2025-12-09 Vikramjeet Singh Chandel , Sushil Gorai , Anwoy Maitra , Amar Deep Sarkar

We use properties of the hyperbolic metric and properties of the modular function to show that the Bohr's radius for covering maps onto hyperbolic domains is greater or equal to exponential minus pi. This includes almost all known classes…

度量几何 · 数学 2024-03-19 Yusuf Abu Muhanna , Issam Louhichi

In this paper we study the geometry and the topology of unbounded domains in the Hyperbolic Space $\mathbb{H} ^n$ supporting a bounded positive solution to an overdetermined elliptic problem. Under suitable conditions on the elliptic…

偏微分方程分析 · 数学 2015-11-10 José M. Espinar , Alberto Farina , Laurent Mazet

We survey the definition of the radial Julia set of a meromorphic function (in fact, more generally, any "Ahlfors islands map"), and give a simple proof that the Hausdorff dimension of the reduced Julia set always coincides with the…

动力系统 · 数学 2009-01-21 Lasse Rempe

In this paper an explicit formula for a lower bound on the volume of a hyperbolic orbifold, dependent on dimension and the maximal order of torsion in the orbifolds' fundamental group, is constructed.

几何拓扑 · 数学 2007-09-05 Ilesanmi Adeboye

We construct an explicit lower bound for the volume of a complex hyperbolic orbifold that depends only on dimension.

几何拓扑 · 数学 2013-11-28 Ilesanmi Adeboye , Guofang Wei
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