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We give a combinatorial definition of "core entropy" for quadratic polynomials as the growth exponent of the number of certain precritical points in the Julia set (those that separate the $\alpha$ fixed point from its negative). This notion…

Dynamical Systems · Mathematics 2016-02-23 Dzmitry Dudko , Dierk Schleicher

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

Let $f_0$ be a polynomial of degree $d_1+d_2$ with a periodic critical point $0$ of multiplicity $d_1-1$ and a Julia critical point of multiplicity $d_2$. We show that if $f_0$ is primitive, free of neutral periodic points and…

Dynamical Systems · Mathematics 2021-03-04 Yimin Wang

In this paper, we classify, up to three possible exceptions, all monic, post-critically finite quadratic polynomials $f(x)\in \mathbb{Z}[x]$ with an iterate reducible module every prime, but all of whose iterates are irreducible over…

Number Theory · Mathematics 2019-07-09 Vefa Goksel

We study the closure of the cubic Principal Hyperbolic Domain and its intersection $\mathcal{P}_\lambda$ with the slice $\mathcal{F}_\lambda$ of the space of all cubic polynomials with fixed point $0$ defined by the multiplier $\lambda$ at…

Dynamical Systems · Mathematics 2019-04-01 Alexander Blokh , Lex Oversteegen , Ross Ptacek , Vladlen Timorin

We study the dynamics of polynomials with coefficients in a non-Archimedean field $K,$ where $K$ is a field containing a dense subset of algebraic elements over a discrete valued field $k.$ We prove that every wandering Fatou component is…

Dynamical Systems · Mathematics 2010-05-14 Eugenio Trucco

We prove that any unicritical polynomial $f_c:z\mapsto z^d+c$ which is at most finitely renormalizable and has only repelling periodic points is combinatorially rigid. It implies that the connectedness locus (the ``Multibrot set'') is…

Dynamical Systems · Mathematics 2007-05-23 Artur Avila , Jeremy Kahn , Mikhail Lyubich , Weixiao Shen

The no invariant line fields conjecture is one of the main outstanding problems in traditional complex dynamics. In this paper we consider non-autonomous iteration where one works with compositions of sequences of polynomials with suitable…

Dynamical Systems · Mathematics 2011-05-24 Mark Comerford

We consider infinitely renormalizable Lorenz maps with real critical exponent $\alpha>1$ and combinatorial type which is monotone and satisfies a long return condition. For these combinatorial types we prove the existence of periodic points…

Dynamical Systems · Mathematics 2015-06-05 Marco Martens , Björn Winckler

In this paper we prove existence of matings between a large class of renormalizable cubic polynomials with one fixed critical point and another cubic polynomial having two fixed critical points. The resulting mating is a Newton map. Our…

Dynamical Systems · Mathematics 2018-05-16 Magnus Aspenberg , Pascale Roesch

We introduce a class of infinitely renormalizable, unicritical diffeomorphisms of the disk (with a non-degenerate "critical point"). In this class of dynamical systems, we show that under renormalization, maps eventually become…

Dynamical Systems · Mathematics 2024-01-25 Sylvain Crovisier , Mikhail Lyubich , Enrique Pujals , Jonguk Yang

We are concerned with the behavior of the polynomial maps $F=(P,Q)$ of $\mathbb{C}^2$ with finite fibres and satisfying the condition that all of the curves $aP+bQ=0$, $(a:b)\in \mathbb{P}^1$, are irreducible rational curves. The obtained…

Algebraic Geometry · Mathematics 2017-09-13 Nguyen Van Chau

In this paper we describe the well studied process of renormalization of quadratic polynomials from the point of view of their natural extensions. In particular, we describe the topology of the inverse limit of infinitely renormalizable…

Dynamical Systems · Mathematics 2007-06-29 Carlos Cabrera , Tomoki Kawahira

A polynomial with rational coefficients is said to be pure with respect to a rational prime $p$ if its Newton polygon has one slope. In this article, we prove that the number of irreducible factors of the $n$-th iterate of a pure polynomial…

Number Theory · Mathematics 2023-01-31 Mohamed O Darwish , Mohammad Sadek

In this paper we generalize renormalization theory for analytic critical circle maps with a cubic critical point to the case of maps with an arbitrary odd critical exponent by proving a quasiconformal rigidity statement for renormalizations…

Dynamical Systems · Mathematics 2016-12-26 Michael Yampolsky

This paper, being the sequel of [An inverse problem in Polya-Schur theory. I. Non-genegerate and degenerate operators], studies a class of linear ordinary differential operators with polynomial coefficients called \emph{exactly solvable};…

Dynamical Systems · Mathematics 2024-12-03 Per Alexandersson , Nils Hemmingsson , Boris Shapiro

Let K be an algebraically closed field of characteristic zero. We say that a polynomial automorphism f : K^n -> K^n is special if the Jacobian of f is equal to 1. We show that every (n - 1)-dimensional component H of the set Fix(f) of fixed…

Algebraic Geometry · Mathematics 2014-09-30 Zbigniew Jelonek , Tomasz Lenarcik

We generalize the classical lifting and recombination scheme for rational and absolute factorization of bivariate polynomials to the case of a critical fiber. We explore different strategies for recombinations of the analytic factors,…

Algebraic Geometry · Mathematics 2015-01-14 Martin Weimann

We present a proof of the existence of a renormalization fixed point for Lorenz maps of the simplest non-unimodal combinatorial type ({0,1},{1,0,0}), and with a critical point of arbitrary order rho>1.

Dynamical Systems · Mathematics 2012-05-10 Denis Gaidashev , Bjorn Winckler

An irreducible element of a commutative ring is absolutely irreducible if no power of it has more than one (essentially different) factorization into irreducibles. In the case of the ring $\text{Int}(D)=\{f\in K[x]\mid f(D)\subseteq D\}$,…

Commutative Algebra · Mathematics 2020-04-02 Sophie Frisch , Sarah Nakato