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We define a Bowen-Series like map for every geometric presentation of a co-compact surface group and we prove that the volume entropy of the presentation is the topological entropy of this particular (circle) map. Finally we find the…

动力系统 · 数学 2009-08-26 Jérôme Los

The main result of this paper is a proof using real analysis of the monotonicity of the topological entropy for the family of quadratic maps, sometimes called Milnor's Monotonicity Conjecture. In contrast, the existing proofs rely in one…

动力系统 · 数学 2020-10-13 José M. Amigó , Angel Giménez

In \cite{Mil}, Milnor posed the {\em Monotonicity Conjecture} that the set of parameters within a family of real multimodal polynomial interval maps, for which the topological entropy is constant, is connected. This conjecture was proved…

动力系统 · 数学 2013-12-11 Henk Bruin , Sebastian van Strien

It has been known for some time that the topological entropy is a nondecreasing function of the parameter in the real quadratic family, which corresponds to the intuitive idea that more nonlinearity induces more complex dynamical behavior.…

动力系统 · 数学 2009-09-25 John Milnor , Charles Tresser

In this paper we will modify the Milnor--Thurston map, which maps a one dimensional mapping to a piece-wise linear of the same entropy, and study its properties. This will allow us to give a simple proof of monotonicity of topological…

动力系统 · 数学 2019-01-23 Oleg Kozlovski

Given a closed, orientable surface of constant negative curvature and genus $g \ge 2$, we study a family of generalized Bowen-Series boundary maps and prove the following rigidity result: in this family the topological entropy is constant…

动力系统 · 数学 2022-10-10 Adam Abrams , Svetlana Katok , Ilie Ugarcovici

In this note a notion of generalized topological entropy for arbitrary subsets of the space of all sequences in a compact topological space is introduced. It is shown that for a continuous map on a compact space the generalized topological…

动力系统 · 数学 2024-10-29 Maysam Maysami Sadr , Mina Shahrestani

The topological entropy of a continuous self-map of a compact metric space can be defined in several distinct ways; when the space is not assumed compact, these definitions can lead to distinct invariants. The original, purely topological…

动力系统 · 数学 2007-05-23 Boris Hasselblatt , Zbigniew Nitecki , James Propp

In connection with the Entropy Conjecture it is known that the topological entropy of a continuous graph map is bounded from below by the spectral radius of the induced map on the first homology group. We show that in the case of a…

动力系统 · 数学 2007-05-23 João F. Alves , Roman Hric , José Sousa Ramos

We consider some classes of piecewise expanding maps in finite dimensional spaces having invariant probability measures which are absolutely continuous with respect to Lebesgue measure. We derive an entropy formula for such measures and,…

动力系统 · 数学 2018-06-05 Jose F. Alves , Antonio Pumarino

Expanding Thurston maps were introduced by M. Bonk and D. Meyer with motivation from complex dynamics and Cannon's conjecture from geometric group theory via Sullivan's dictionary. In this paper, we show that the entropy map of an expanding…

动力系统 · 数学 2024-06-05 Zhiqiang Li , Xianghui Shi

In the family of area-contracting H\'enon-like maps with zero topological entropy we show that there are maps with infinitely many moduli of stability. Thus one cannot find all the possible topological types for non-chaotic area-contracting…

动力系统 · 数学 2017-09-05 Peter Hazard , Marco Martens , Charles Tresser

Given a closed, orientable surface of constant negative curvature and genus $g \ge 2$, we study the topological entropy and measure-theoretic entropy (with respect to a smooth invariant measure) of generalized Bowen--Series boundary maps.…

动力系统 · 数学 2022-10-10 Adam Abrams , Svetlana Katok , Ilie Ugarcovici

In this paper, we introduce topological entropy for dynamical systems generated by a single local homeomorphism (Deaconu-Renault systems). More precisely, we generalize Adler, Konheim, and McAndrew's definition of entropy via covers and…

动力系统 · 数学 2023-01-25 Daniel Gonçalves , Danilo Royer , Felipe Augusto Tasca

We give a hierarchy of many-parameter families of maps of the interval [0,1] with an invariant measure and using the measure, we calculate Kolmogorov--Sinai entropy of these maps analytically. In contrary to the usual one-dimensional maps…

混沌动力学 · 物理学 2015-06-26 M. A. Jafarizadeh , S. Behnia

In this paper we prove that the monotonicity of kneading sequences and topological entropy, a fundamental structural property of the quadratic family, extends to the class of power-law unimodal maps $f_a(x)=a-|x|^r$ for arbitrary critical…

动力系统 · 数学 2026-05-13 Michael Benedicks , Ana Rodrigues

We study the volume entropy of a class of presentations (including the classical ones) for all surface groups, called \emph{minimal geometric presentations}. We rediscover a formula first obtained by Cannon and Wagreich with the computation…

动力系统 · 数学 2014-07-08 Lluís Alsedà , David Juher , Jérôme Los , Francesc Mañosas

We consider a one parameter family of Lorenz maps indexed by their point of discontinuity $p$ and constructed from a pair of bilipschitz functions. We prove that their topological entropies vary continuously as a function of $p$ and discuss…

We study the topological entropy of a two-parameter family of maps related to (a,b)-continued fraction algorithms and prove that it is constant on a square within the parameter space (two vertices of this square correspond to well-studied…

动力系统 · 数学 2023-04-26 Adam Abrams , Svetlana Katok , Ilie Ugarcovici

Maps on a parameter space for expressing distribution functions are exactly derived from the Perron-Frobenius equations for a generalized Boole transform family. Here the generalized Boole transform family is a one-parameter family of maps…

数学物理 · 物理学 2018-04-18 Shin-itiro Goto , Ken Umeno
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