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Let $f$ be a transcendental entire function, and let $U,V\subset\mathbb{C}$ be disjoint simply-connected domains. Must one of $f^{-1}(U)$ and $f^{-1}(V)$ be disconnected? In 1970, Baker implicitly gave a positive answer to this question, in…

Dynamical Systems · Mathematics 2020-08-26 Lasse Rempe-Gillen , Dave Sixsmith

In this paper, we have investigated the Bungee set of composition of two transcendental entire functions. We have provided a class of permutable entire functions for which their Bungee sets are equal. Moreover, we have obtained a result on…

Dynamical Systems · Mathematics 2023-02-20 Dinesh Kumar , Ramanpreet Kaur

We prove that the set of all endpoints of the Julia set of $f(z)=\exp(z)-1$ which escape to infinity under iteration of $f$ is not homeomorphic to the rational Hilbert space $\mathfrak E$. As a corollary, we show that the set of all points…

Dynamical Systems · Mathematics 2022-04-13 David S. Lipham

We show that if a meromorphic function has two completely invariant Fatou components and only finitely many critical and asymptotic values, then its Julia set is a Jordan curve. However, even if both domains are attracting basins, the Julia…

Complex Variables · Mathematics 2009-09-29 Walter Bergweiler , Alexandre Eremenko

We study topological properties of the escaping endpoints and fast escaping endpoints of the Julia set of complex exponential $\exp(z)+a$ when $a\in (-\infty,-1)$. We show neither space is homeomorphic to the whole set of endpoints. This…

Dynamical Systems · Mathematics 2022-04-13 David Sumner Lipham

We prove that every transcendental meromorphic map f with a disconnected Julia set has a weakly repelling fixed point. This implies that the Julia set of Newton's method for finding zeroes of an entire map is connected. Moreover, extending…

Dynamical Systems · Mathematics 2014-12-01 Krzysztof Baranski , Nuria Fagella , Xavier Jarque , Boguslawa Karpinska

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

Given an entire transcendental function f with a non-completely invariant Baker domain, we define a Baker lamination on geodesics to study the divergence and convergence of a pinching process of curves in U. If the boundary of some curve in…

Dynamical Systems · Mathematics 2023-05-18 Rodrigo Robles Montero

We show that a direct tract bounded by a simple curve is a logarithmic tract and further give sufficient conditions for a direct tract to contain logarithmic tracts. As an application of these results, an example of a function with…

Complex Variables · Mathematics 2019-02-13 James Waterman

We study the geometry of simply connected wandering domains for entire functions and we prove that every bounded connected regular open set, whose closure has a connected complement, is a wandering domain of some entire function. In…

Complex Variables · Mathematics 2021-04-23 Luka Boc Thaler

The so-called Fundamental Theorem of Dynamical Systems -- which(1) relates attractors and repellers to the chain recurrent set and (2) gives the existence of a complete Lyapunov function -- can be seen as a means of separating out…

Dynamical Systems · Mathematics 2025-08-15 Andrew D. Lewis

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…

Dynamical Systems · Mathematics 2018-06-20 David Martí-Pete

Baker's conjecture states that a transcendental entire function of order less than $1/2$ has no unbounded Fatou components. It is known that, for such functions, there are no unbounded periodic Fatou components and so it remains to show…

Complex Variables · Mathematics 2015-02-10 D. A. Nicks , P. J. Rippon , G. M. Stallard

For a transcendental entire function, a partial affirmative answer to Baker's question on the boundedness of its Fatou components is given. In addition, we have addressed Wang's question on Fej\'er gaps. Certain results about functions with…

Complex Variables · Mathematics 2022-12-09 Ramanpreet Kaur

Given commuting functions f,g, with at most a countable compact set of essential singularities, recent results for entire functions are extended to prove that Julia sets match, J(f)=J(g), in a particular case in the class K. With this…

Dynamical Systems · Mathematics 2021-09-21 Adrián Esparza-Amador

We classify transcendental entire functions that are compositions of a polynomial and the exponential for which all singular values escape on disjoint rays. We focus on the case where the escape is degenerate in the sense that points from…

Dynamical Systems · Mathematics 2021-04-27 Konstantin Bogdanov

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…

Complex Variables · Mathematics 2020-06-17 Kuldeep Singh Charak , Anil Singh , Manish Kumar

We show that if a 1-hyperbolic structurally finite entire function of type $(p,q)$, $p\ge 1$, is linearizable at an irrationally indifferent fixed point, then its multiplier satisfies the Brjuno condition. We also prove the generalized…

Complex Variables · Mathematics 2012-01-09 Yûsuke Okuyama

We completely characterise the bounded sets that arise as components of the Fatou and Julia sets of meromorphic functions. On the one hand, we prove that a bounded domain is a Fatou component of some meromorphic function if and only if it…

Dynamical Systems · Mathematics 2024-12-10 David Martí-Pete , Lasse Rempe , James Waterman

We construct the first examples of rational functions defined over a non-archimedean field with certain dynamical properties. In particular, we find such functions whose Julia sets, in the Berkovich projective line, are connected but not…

Dynamical Systems · Mathematics 2015-04-08 Dvij Bajpai , Robert L. Benedetto , Ruqian Chen , Edward Kim , Owen Marschall , Darius Onul , Yang Xiao