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The Fatou-Julia decomposition is significant in the study of iterations of holomorphic mappings. Such a decomposition can be also considered for foliations in a unified manner. Although the decomposition will be fundamental in the study, it…

Dynamical Systems · Mathematics 2019-09-18 Taro Asuke

This paper constructs a combinatorial model for all postcritically finite rational maps arising as the Newton's method of a complex polynomial. This model is used in [LMS] to give a combinatorial classification of postcritically finite…

Dynamical Systems · Mathematics 2021-08-04 Russell Lodge , Yauhen Mikulich , Dierk Schleicher

Quadratic laminations of the unit disk were introduced by Thurston as a vehicle for understanding the (connected) Julia sets of quadratic polynomials and the parameter space of quadratic polynomials. The "Central Strip Lemma" plays a key…

Dynamical Systems · Mathematics 2015-01-27 David J. Cosper , Jeffrey K. Houghton , John C. Mayer , Luka Mernik , Joseph W. Olson

We define and study a class of finite topological spaces, which model the cell structure of a space obtained by gluing finitely many Euclidean convex polyhedral cells along congruent faces. We call these finite topological spaces,…

Algebraic Topology · Mathematics 2008-07-28 Tathagata Basak

We give a combinatorial criterion for a critical diameter to be compatible with a non-degenerate quadratic lamination.

Dynamical Systems · Mathematics 2016-01-25 A. Blokh , D. Childers , J. Mayer , L. Oversteegen

In general, little is known about the exact topological structure of Julia sets containing a Cremer point. In this paper we show that there exist quadratic Cremer Julia sets of positive area such that for a full Lebesgue measure set of…

Dynamical Systems · Mathematics 2016-01-25 A. Blokh , X. Buff , A. Chéritat , L. Oversteegen

Any finite union of disjoint, mutually exterior Jordan curves in the complex plane can be approximated arbitrarily well in the Hausdorff topology by polynomial Julia sets. Furthermore, the proof is constructive.

Dynamical Systems · Mathematics 2016-03-02 Kathryn A. Lindsey

To investigate the degree $d$ connectedness locus, Thur\-ston studied \emph{$\sigma_d$-invariant laminations}, where $\sigma_d$ is the $d$-tupling map on the unit circle, and built a topological model for the space of quadratic polynomials…

Dynamical Systems · Mathematics 2022-01-28 Alexander Blokh , Lex Oversteegen , Nikita Selinger , Vladlen Timorin , Sandeep Chowdary Vejandla

Holomorphic renormalization plays an important role in complex polynomial dynamics. We consider certain conditions guaranteeing that a polynomial which does not admit a polynomial-like connected Julia set still admits an invariant continuum…

Dynamical Systems · Mathematics 2023-08-01 Alexander Blokh , Peter Haissinsky , Lex Oversteegen , Vladlen Timorin

Complex 1-variable polynomials with connected Julia sets and only repelling periodic points are called \emph{dendritic}. By results of Kiwi, any dendritic polynomial is semi-conjugate to a topological polynomial whose topological Julia set…

Dynamical Systems · Mathematics 2021-12-21 Alexander Blokh , Lex Oversteegen , Ross Ptacek , Vladlen Timorin

The Tautological Lamination arises in holomorphic dynamics as a combinatorial model for the geometry of 1-dimensional slices of the Shift Locus. In each degree $q$ the tautological lamination defines an iterated sequence of partitions of…

Dynamical Systems · Mathematics 2024-08-06 Danny Calegari

Thurston introduced $\si_d$-invariant laminations (where $\si_d(z)$ coincides with $z^d:\ucirc\to \ucirc$, $d\ge 2$) and defined \emph{wandering $k$-gons} as sets $\T\subset \ucirc$ such that $\si_d^n(\T)$ consists of $k\ge 3$ distinct…

Dynamical Systems · Mathematics 2016-01-18 A. Blokh , C. Curry , L. Oversteegen

The dynamics of all quadratic Newton maps of rational functions are completely described. The Julia set of such a map is found to be either a Jordan curve or totally disconnected. It is proved that no Newton map with degree at least three…

Complex Variables · Mathematics 2021-08-17 Tarakanta Nayak , Soumen Pal

For maps of one complex variable, $f$, given as the sum of a degree $n$ power map and a degree $d$ polynomial, we provide necessary and sufficient conditions that the geometric limit as $n$ approaches infinity of the set of points that…

Dynamical Systems · Mathematics 2020-08-14 Micah Brame , Scott Kaschner

We study Henon maps which are perturbations of a hyperbolic polynomial p with connected Julia set. We give a complete description of the critical locus of these maps. In particular, we show that for each critical point c of p, there is a…

Dynamical Systems · Mathematics 2021-01-29 Misha Lyubich , John W. Robertson

We introduce tessellation of the filled Julia sets for hyperbolic and parabolic quadratic maps. Then the dynamics inside their Julia sets are organized by tiles which work like external rays outside. We also construct continuous families of…

Dynamical Systems · Mathematics 2024-01-03 Tomoki Kawahira

We interpret the combinatorial Mandelbrot set in terms of \it{quadratic laminations} (equivalence relations $\sim$ on the unit circle invariant under $\sigma_2$). To each lamination we associate a particular {\em geolamination} (the…

Dynamical Systems · Mathematics 2022-01-28 A. Blokh , L. Oversteegen , V. Timorin , R. Ptacek

We define the (dynamical) core of a topological polynomial (and the associated lamination). This notion extends that of the core of a unimodal interval map. Two explicit descriptions of the core are given: one related to periodic objects…

Dynamical Systems · Mathematics 2016-01-18 Alexander Blokh , Lex Oversteegen , Ross Ptacek , Vladlen Timorin

In this paper, we study the large scaled geometric structure of Julia sets of entire and meromorphic functions. Roughly speaking, the structure gives us some asymptotic information about the Julia set near the essential singularity. We will…

Dynamical Systems · Mathematics 2018-05-22 Jun Wang , Xiao Yao

We give a combinatorial classification for the class of postcritically fixed Newton maps of polynomials as dynamical systems. This lays the foundation for classification results of more general classes of Newton maps. A fundamental…

Dynamical Systems · Mathematics 2019-10-09 Kostiantyn Drach , Yauhen Mikulich , Johannes Rückert , Dierk Schleicher