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Under conjugation by affine transformations, the dynamical moduli space of cubic polynomials $f$ with a $2$-cycle of Siegel disks is parameterized by a three-punctured complex plane as a degree-$2$ cover. Assuming the rotation number of…

Dynamical Systems · Mathematics 2024-10-23 Yuming Fu , Jun Hu , Oleg Muzician

We describe a rigorous computer algorithm for attempting to construct an explicit, discretized metric for which a complex polynomial map is expansive on a given neighborhood of its Julia set. We show construction of such a metric proves the…

Dynamical Systems · Mathematics 2023-08-14 Suzanne Lynch Hruska

We consider polynomial maps $f:\C\to\C$ of degree $d\ge 2$, or more generally polynomial maps from a finite union of copies of $\C$ to itself which have degree two or more on each copy. In any space $\p^{S}$ of suitably normalized maps of…

Dynamical Systems · Mathematics 2009-09-25 John W. Milnor , Alfredo Poirier

Let $f$ be a generically finite polynomial map $f: \mathbb{C}^n\to \mathbb{C}^m$ of algebraic degree $d$. Motivated by the study of the Jacobian Conjecture, we prove that the set $S_f$ of non-properness of $f$ is covered by parametric…

Algebraic Geometry · Mathematics 2019-06-12 Zbigniew Jelonek , Michał Lasoń

By studying laminations of the unit disk, we can gain insight into the structure of Julia sets of polynomials and their dynamics in the complex plane. The polynomials of a given degree, $d$, have a parameter space. The hyperbolic components…

Dynamical Systems · Mathematics 2023-09-25 John C. Mayer , Michael J. Moorman , Gabriel B. Quijano , Matthew C. Williams

In this paper we prove the following: Take any "small Mandelbrot set" and zoom in a neighborhood of a parabolic or Misiurewicz parameter in it, then we can see a quasiconformal image of a Cantor Julia set which is a perturbation of a…

Dynamical Systems · Mathematics 2024-01-17 Tomoki Kawahira , Masashi Kisaka

The main purpose of this paper is to define dynamical degrees for rational maps over an algebraic closed field of characteristic zero and prove some basic properties (such as log-concavity) and give some applications. We also define…

Algebraic Geometry · Mathematics 2015-01-08 Tuyen Trung Truong

Let $f$ be a quadratic polynomial which has an irrationally indifferent fixed point $\alpha$. Let $z$ be a biaccessible point in the Julia set of $f$. Then: 1. In the Siegel case, the orbit of $z$ must eventually hit the critical point of…

Dynamical Systems · Mathematics 2016-09-07 Saeed Zakeri

For certain typical perturbations $(f_n)_n$ of a rational map $f$ with parabolic cycles, we investigate the relations between the Hausdorff convergence of Julia sets and invariant rays, and the horocyclic convergence of multipliers of…

Dynamical Systems · Mathematics 2026-02-25 Xiaoguang Wang

In this paper we introduce the notion of parabolic-like mapping, which is an object similar to a polynomial-like mapping, but with a parabolic external class, i.e. an external map with a parabolic fixed point. We prove a straightening…

Dynamical Systems · Mathematics 2013-08-05 Luciana Luna Anna Lomonaco

We provide a natural canonical decomposition of postcritically finite rational maps with non-empty Fatou sets based on the topological structure of their Julia sets. The building blocks of this decomposition are maps where all Fatou…

Dynamical Systems · Mathematics 2022-09-08 Dzmitry Dudko , Mikhail Hlushchanka , Dierk Schleicher

We prove that Julia components of polynomials are generally small in diameter. For polynomials without irrationally neutral cycles, Fatou components are also typically small, even when the Julia set is not locally connected.

Dynamical Systems · Mathematics 2025-07-14 Jinsong Zeng

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

Makienko's conjecture, a proposed addition to Sullivan's dictionary, can be stated as follows: The Julia set of a rational function R has buried points if and only if no component of the Fatou set is completely invariant under the second…

Dynamical Systems · Mathematics 2010-07-01 Clinton P. Curry , John C. Mayer , Jonathan Meddaugh , James T. Rogers

In this article, we combine complex-analytic and arithmetic tools to study the preperiodic points of one-dimensional complex dynamical systems. We show that for any fixed complex numbers a and b, and any integer d at least 2, the set of…

Dynamical Systems · Mathematics 2019-12-19 Matthew Baker , Laura DeMarco

We show that the Julia set of quadratic maps with parameters in hyperbolic components of the Mandelbrot set is given by a transseries formula, rapidly convergent at any repelling periodic point. Up to conformal transformations, we obtain…

Dynamical Systems · Mathematics 2009-10-29 O. Costin , M. Huang

There are two natural definitions of the Julia set for complex H\'enon maps: the sets $J$ and $J^\star$. Whether these two sets are always equal is one of the main open questions in the field. We prove equality when the map acts…

Complex Variables · Mathematics 2017-09-08 Lorenzo Guerini , Han Peters

A. Sannami constructed an example of the differentiable Cantor set embedded in the real line whose difference set has a positive measure. In this paper, we generalize the definition of the difference sets for sets of the two dimensional…

Dynamical Systems · Mathematics 2020-04-10 Hiromichi Nakayama , Takuya Takahashi

Let $f$ be a post-critically finite endomorphism (PCF map for short) on $\mathbb{P}^2$, let $J_1$ denote the Julia set and let $J_2$ denote the support of the measure of maximal entropy. In this paper we show that: 1. $J_1\setminus J_2$ is…

Dynamical Systems · Mathematics 2022-06-22 Zhuchao Ji

We study quasiconformal deformations and mixing properties of hyperbolic sets in the family of holomorphic correspondences z^r +c, where r >1 is rational. Julia sets in this family are projections of Julia sets of holomorphic maps on C^2,…

Dynamical Systems · Mathematics 2017-08-02 Carlos Siqueira , Daniel Smania