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We study rational functions satisfying summability conditions - a family of weak conditions on the expansion along the critical orbits. Assuming their appropriate versions, we derive many nice properties: There exists a unique, ergodic, and…

Dynamical Systems · Mathematics 2008-10-15 Jacek Graczyk , Stanislav Smirnov

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

This paper will study topological, geometrical and measure-theoretical properties of the real Fibonacci map. Our goal was to figure out if this type of recurrence really gives any pathological examples and to compare it with the infinitely…

Dynamical Systems · Mathematics 2016-09-06 Mikhail Lyubich , John W. Milnor

In this work we study the backward filled Julia sets of a class of $p$-adic polynomial maps $f:\mathbb{Q}_p^2\longrightarrow \mathbb{Q}_p^2$ defined by $f(x,y)=(xy+c,x)$, where $c\in\mathbb{Q}_p$ is a $p$-adic number. In particular, if…

Dynamical Systems · Mathematics 2025-11-26 Jéfferson L. R. Bastos , Danilo Caprio , Oyran Raizzaro

Let P be a non-linear polynomial, K_P the filled Julia set of P, f a renormalization of P and K_f the filled Julia set of f. We show, loosely speaking, that there is a finite-to-one function \lambda from the set of P-external rays having…

Dynamical Systems · Mathematics 2021-02-23 Genadi Levin

In this paper geometric properties of infinitely renormalizable real H\'enon-like maps $F$ in $\R^2$ are studied. It is shown that the appropriately defined renormalizations $R^n F$ converge exponentially to the one-dimensional…

Dynamical Systems · Mathematics 2007-05-23 A. de Carvalho , M. Lyubich , M. Martens

We prove that for every polynomial of one complex variable of degree at least 2 and Julia set not being totally disconnected nor a circle, nor interval, Hausdorff dimension of this Julia set is larger than 1. Till now this was known only in…

Dynamical Systems · Mathematics 2021-03-08 Feliks Przytycki , Anna Zdunik

We prove the a priori bounds for infinitely renormalizable quadratic polynomials for which we can find an infinite sequence of primitive renormalizations such that the ratios of the periods of successive renormalizations is bounded. This…

Dynamical Systems · Mathematics 2024-01-01 Jeremy Kahn

In this article, we introduce the adapted inverse iteration method to generate bicomplex Julia sets associated to the polynomial map $w^2+c$. The result is based on a full characterization of bicomplex Julia sets as the boundary of a…

Dynamical Systems · Mathematics 2015-03-13 C. Matteau , D. Rochon

Sun Daochun and Yang Lo have shown that many results of the Fatou-Julia iteration theory of rational functions extend to quasiregular self-maps of the Riemann sphere for which the degree exceeds the dilatation. We show that in this context,…

Dynamical Systems · Mathematics 2014-08-12 Walter Bergweiler

We present the first example of a poly-time computable Julia set with a recurrent critical point: we prove that the Julia set of the Feigenbaum map is computable in polynomial time.

Dynamical Systems · Mathematics 2015-07-29 Artem Dudko , Michael Yampolsky

Given a polynomial $p$, the degree of its Chebyshev's method $C_p$ is determined. If $p$ is cubic then the degree of $C_p$ is found to be $4,6$ or $7$ and we investigate the dynamics of $C_p$ in these cases. If a cubic polynomial $p$ is…

Dynamical Systems · Mathematics 2022-01-27 Tarakanta Nayak , Soumen Pal

A cubic polynomial $P$ with a non-repelling fixed point $b$ is said to be immediately renormalizable if there exists a (connected) QL invariant filled Julia set $K^*$ such that $b\in K^*$. In that case, exactly one critical point of $P$…

Dynamical Systems · Mathematics 2023-08-31 Alexander Blokh , Lex Oversteegen , Vladlen Timorin

We describe the statistical properties of the dynamics of the quadratic polynomials P_a(z):=e^{2\pi a i} z+z^2 on the complex plane, with a of high return times. In particular, we show that these maps are uniquely ergodic on their measure…

Dynamical Systems · Mathematics 2022-02-09 Artur Avila , Davoud Cheraghi

In this paper, we study rigidity of polynomials of arbitrary degree in the presence of neutral dynamics. Specifically, we focus on {non-renormalizable} (in the sense of Douady and Hubbard) complex polynomials of degree $d \geqslant 2$ that…

Dynamical Systems · Mathematics 2025-11-27 Kostiantyn Drach , Jonguk Yang

In this work we will show that the Teichm\"{u}ller distance for all elements of a certain class of generalized polynomial-like maps (the class of off-critically hyperbolic generalized polynomial-like maps) is actually a distance, as in the…

Dynamical Systems · Mathematics 2016-09-06 Eduardo A. Prado

A decoration of the Mandelbrot set $M$ is a part of $M$ cut off by two external rays landing at some tip of a satellite copy of $M$ attached to the main cardioid. In this paper we consider infinitely renormalizable quadratic polynomials…

Dynamical Systems · Mathematics 2007-05-23 Jeremy Kahn , Mikhail Lyubich

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 study the possible Hausdorff limits of the Julia sets and filled Julia sets of subsequences of the sequence of dual Chebyshev polynomials of a non-polar compact set K in C and compare such limits to K. Moreover, we prove that the…

A small perturbation of a quadratic polynomial with a non-repelling fixed point gives a polynomial with an attracting fixed point and a Jordan curve Julia set, on which the perturbed polynomial acts like angle doubling. However, there are…

Dynamical Systems · Mathematics 2016-02-01 Alexander Blokh , Lex Oversteegen , Ross Ptacek , Vladlen Timorin