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Much recent work on the iterates of a transcendental entire function $f$ has been motivated by Eremenko's conjecture that all the components of the escaping set $I(f)$ are unbounded. Here we show that if $I(f)$ is disconnected, then the set…

Dynamical Systems · Mathematics 2017-04-03 Philip Rippon , Gwyneth Stallard

Let f be an entire function with a bounded set of singular values, and suppose furthermore that the postsingular set of f is bounded. We show that every component of the escaping set I(f) is unbounded. This provides a partial answer to a…

Dynamical Systems · Mathematics 2007-12-11 Lasse Rempe

Let $f$ be a transcendental entire function and let $A(f)$ denote the set of points that escape to infinity `as fast as possible' under iteration. By writing $A(f)$ as a countable union of closed sets, called `levels' of $A(f)$, we obtain a…

Complex Variables · Mathematics 2014-02-26 P. J. Rippon , G. M. Stallard

We prove a form of the $\cos \pi \rho$ theorem which gives strong estimates for the minimum modulus of a transcendental entire function of order zero. We also prove a generalisation of a result of Hinkkanen that gives a sufficient condition…

Complex Variables · Mathematics 2008-01-24 P. J. Rippon , G. M. Stallard

For a transcendental entire function f, we study the set of points BU(f) whose iterates under f neither escape to infinity nor are bounded. We give new results on the connectedness properties of this set and show that, if U is a Fatou…

Dynamical Systems · Mathematics 2016-10-03 J. W. Osborne , D. J. Sixsmith

Let $f$ be a transcendental entire function and $U$ be a Fatou component of $f$. We show that if $U$ is an escaping wandering domain of $f$, then most boundary points of $U$ (in the sense of harmonic measure) are also escaping. In the other…

Complex Variables · Mathematics 2010-09-23 Philip J. Rippon , Gwyneth M. Stallard

Let $f\colon\mathbb{C}\to\mathbb{C}$ be a transcendental entire function. In 1989, Eremenko asked the following question concerning the set $I(f)$ of points that tend to infinity under iteration: can every point of $I(f)$ be joined to…

Dynamical Systems · Mathematics 2025-12-16 Andrew P. Brown

We show that for many families of transcendental entire functions $f$ the property that $m^n(r)\to\infty$ as $n\to \infty$, for some $r>0$, where $m(r)=\min\{|f(z)|:|z|=r\}$, implies that the escaping set $I(f)$ of $f$ has the structure of…

Dynamical Systems · Mathematics 2018-10-19 Daniel A. Nicks , Philip J. Rippon , Gwyneth M. Stallard

Given two permutable entire functions $f$ and $g,$ we establish vital relationship between escaping sets of entire functions $f, g$ and their composition. We provide some families of transcendental entire functions for which Eremenko's…

Dynamical Systems · Mathematics 2019-03-20 Ramanpreet Kaur , Dinesh Kumar

We investigate the connectedness properties of the set $ I^{\!+\!}(f) $ of points where the iterates of an entire function $ f $ are unbounded. In particular, we show that $ I^{\!+\!}(f) $ is connected whenever iterates of the minimum…

Dynamical Systems · Mathematics 2016-03-30 J. W. Osborne , P. J. Rippon , G. M. Stallard

We give an example of a transcendental entire function with a simply connected fast escaping Fatou component, but with no multiply connected Fatou components. We also give a new criterion for points to be in the fast escaping set.

Dynamical Systems · Mathematics 2016-01-26 D. J. Sixsmith

We introduce a new technique that allows us to make progress on two long standing conjectures in transcendental dynamics: Baker's conjecture that a transcendental entire function of order less than 1/2 has no unbounded Fatou components, and…

Dynamical Systems · Mathematics 2011-12-22 Philip J. Rippon , Gwyneth M. Stallard

We construct several new classes of transcendental entire functions, f, such that both the escaping set, I(f), and the fast escaping set, A(f), have a structure known as a spider's web. We show that some of these classes have a degree of…

Complex Variables · Mathematics 2016-01-26 D. J. Sixsmith

We develop a general technique for realising full closed subsets of the complex plane as wandering sets of entire functions. Using this construction, we solve a number of open problems. (1) We construct a counterexample to Eremenko's…

Dynamical Systems · Mathematics 2025-09-19 David Martí-Pete , Lasse Rempe , James Waterman

We consider the dynamics of transcendental self-maps of the punctured plane, $\mathbb{C}^*=\mathbb{C}\setminus \{0\}$. We prove that the escaping set $I(f)$ is either connected, or has infinitely many components. We also show that $I(f)\cup…

Dynamical Systems · Mathematics 2019-09-30 Vasiliki Evdoridou , David Martí-Pete , David J. Sixsmith

We investigate some connectedness properties of the set of points K(f) where the iterates of an entire function f are bounded. In particular, we describe a class of transcendental entire functions for which an analogue of the…

Dynamical Systems · Mathematics 2015-06-11 John Osborne

Let $f$ be a transcendental entire function and let $U$ be a univalent Baker domain of $f$. We prove a new result about the boundary behaviour of conformal maps and use this to show that the non-escaping boundary points of $U$ form a set of…

Dynamical Systems · Mathematics 2014-11-26 Phil Rippon , Gwyneth Stallard

The escaping set I(f) of a transcendental meromorphic function f consists of all points which tend to infinity under iteration. The Eremenko-Lyubich class B consists of all transcendental meromorphic functions for which the set of finite…

Dynamical Systems · Mathematics 2012-08-13 Walter Bergweiler , Janina Kotus

Let $f$ be a transcendental entire function. The fast escaping set $A(f)$, various regularity conditions on the growth of the maximum modulus of $f$, and also, more recently, the quite fast escaping set $Q(f)$ have all been used to make…

Dynamical Systems · Mathematics 2013-01-11 Philip J. Rippon , Gwyneth M. Stallard

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…

Complex Variables · Mathematics 2009-01-17 Walter Bergweiler , Alastair Fletcher , Jim Langley , Janis Meyer
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