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We consider the transcendental entire function $ f(z)=z+e^{-z} $, which has a doubly parabolic Baker domain $U$ of degree two, i.e. an invariant stable component for which all iterates converge locally uniformly to infity, and for which the…

Dynamical Systems · Mathematics 2023-03-21 Núria Fagella , Anna Jové-Campabadal

We give a new proof of Fatou's theorem: {\em if an algebraic function has a power series expansion with bounded integer coefficients, then it must be a rational function.} This result is applied to show that for any non--trivial completely…

Number Theory · Mathematics 2008-06-11 Michael Coons , Peter Borwein

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 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

A transcendental entire function f is called geometrically finite if the intersection of the set of singular values with the Fatou set is compact and the intersection of the postsingular set with the Julia set is finite. (In particular,…

Dynamical Systems · Mathematics 2010-11-02 Helena Mihaljevic-Brandt

In this paper we show that Baker domains of transcendental skew products can either bulge or not, depending on the higher order terms. This is in contrast to polynomial skew products where all Fatou components with bounded orbits of an…

Dynamical Systems · Mathematics 2025-10-30 Anna Miriam Benini , Tom Potthink , Jasmin Raissy

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

We prove the existence of a transcendental entire function whose Julia set is a "bouquet of pseudo-arcs". More precisely, the union of the Julia set with infinity is an uncountable union of pseudo-arcs, which are pairwise disjoint except at…

Dynamical Systems · Mathematics 2021-05-24 Tania Gricel Benitez , Lasse Rempe

We consider transcendental entire functions having doubly parabolic Baker domains, such that the Denjoy-Wolff point of the associated inner function is not a singularity. We describe in a very precise way the dynamics on the boundary from a…

Dynamical Systems · Mathematics 2026-05-07 Anna Jové , Łukasz Pawelec

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

C. Bishop has constructed an example of an entire function f in Eremenko-Lyubich class with at least two grand orbits of oscillating wandering domains. In this paper we show that his example has exactly two such orbits, that is, f has no…

Dynamical Systems · Mathematics 2014-10-14 Núria Fagella , Sébastien Godillon , Xavier Jarque

We prove relative Fatou's theorem for nonnegative harmonic functions with respect to a large class of killed subordinate Brownian motions with Gaussian components in bounded $C^{1,1}$ open sets in $\mathbb{R}^{d}$, $d\geq 2$, which asserts…

Probability · Mathematics 2015-05-01 Yunju Lee , Hyunchul Park

Suppose that $f$ is a transcendental entire function, $V \subsetneq \mathbb{C}$ is a simply connected domain, and $U$ is a connected component of $f^{-1}(V)$. Using Riemann maps, we associate the map $f \colon U \to V$ to an inner function…

Dynamical Systems · Mathematics 2021-03-30 Vasiliki Evdoridou , Lasse Rempe , David J. Sixsmith

We construct a transcendental entire $f:\mathbb{C}\rightarrow\mathbb{C}$ such that (1) $f$ has bounded singular set, (2) $f$ has a wandering domain, and (3) each singular value of $f$ escapes to infinity under iteration by $f$.

Dynamical Systems · Mathematics 2021-01-20 Kirill Lazebnik

We consider the dynamical properties of transcendental entire functions and their compositions. We give several conditions under which Fatou set of a transcendental entire function $f$ coincide with that of $f\circ g,$ where $g$ is another…

Dynamical Systems · Mathematics 2014-05-20 Dinesh Kumar , Sanjay Kumar

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

We show the existence of transcendental entire functions $f: \mathbb{C} \rightarrow \mathbb{C}$ with Hausdorff-dimension $1$ Julia sets, such that every Fatou component of $f$ has infinite inner connectivity. We also show that there exist…

Complex Variables · Mathematics 2025-07-09 Jack Burkart , Kirill Lazebnik

We prove the existence of transcendental entire functions $f$ having a property studied by Mahler, namely that $f(\overline{\mathbb{Q}})\subseteq \overline{\mathbb{Q}}$ and $f^{-1}(\overline{\mathbb{Q}})\subseteq \overline{\mathbb{Q}}$, and…

Number Theory · Mathematics 2024-11-22 David Krumm , Diego Marques , Carlos Gustavo Moreira , Pavel Trojovský

While the dynamics of transcendental entire functions in periodic Fatou components and in multiply connected wandering domains are well understood, the dynamics in simply connected wandering domains have so far eluded classification. We…

Dynamical Systems · Mathematics 2019-10-14 Anna Miriam Benini , Vasiliki Evdoridou , Núria Fagella , Philip J. Rippon , Gwyneth M. Stallard

A function is boundedly finite-to-one if there is a natural number $k$ such that each point has at most $k$ inverse images. In this paper, we prove in $\mathsf{ZF}$ (i.e., the Zermelo--Fraenkel set theory without the axiom of choice)…

Logic · Mathematics 2025-09-23 Xiao Hu , Guozhen Shen