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This paper presents the notion of a variation entropy. This concept is an entropy framework for the gradient of the solution of a conservation law instead of on the solution itself. It appears that all semi-norms are admissible variation…

Numerical Analysis · Mathematics 2019-07-01 M. ten Eikelder , I. Akkerman

Entropy of measure preserving or continuous actions of amenable discrete groups allows for various equivalent approaches. Among them are the ones given by the techniques developed by Ollagnier and Pinchon on the one hand and the…

Dynamical Systems · Mathematics 2025-04-09 Till Hauser , Friedrich Martin Schneider

In the present paper, we introduce a natural extension of AKM-topological entropy for noncompact spaces and prove a variational principle which states that the topological entropy, the supremum of the measure theoretical entropies and the…

Dynamical Systems · Mathematics 2008-04-29 Mauro Patrão

We prove that a topologically predictable action of a countable amenable group has zero topological entropy, as conjectured by Hochman. On route, we investigate invariant random orders and formulate a unified Kieffer-Pinsker formula for the…

Dynamical Systems · Mathematics 2019-02-06 Andrei Alpeev , Tom Meyerovitch , Sieye Ryu

The notion of entropy appears in many fields and this paper is a survey about entropies in several branches of Mathematics. We are mainly concerned with the topological and the algebraic entropy in the context of continuous endomorphisms of…

General Topology · Mathematics 2013-08-20 Dikran Dikranjan , Anna Giordano Bruno

In this paper we introduce three notions of measure theoretical entropy of a measurable cover U in a measure theoretical dynamical system. Two of them were already introduced in [R] and the new one is defined only in the ergodic case. We…

Dynamical Systems · Mathematics 2008-10-24 Uri Shapira

The purpose of this paper is to generalize the variational principle, which states that the topological entropy is equal to the supremum of the measure theoretical entropies and also the minimum of the metric theoretical entropies, to…

Dynamical Systems · Mathematics 2013-12-04 Zheng Wei , Yangeng Wang , Guo Wei , Zhiming Li , Tonghui Wang

A rigorous connection is established between the local porosity entropy introduced by Boger et al. (Physica A 187, 55 (1992)) and the configurational entropy of Andraud et al. (Physica A 207, 208 (1994)). These entropies were introduced as…

Materials Science · Physics 2015-06-25 C. Andraud , A. Beghdadi , E. Haslund , R. Hilfer , J. Lafait , B. Virgin

A topological dynamical system $(X,f)$ induces two natural systems, one is on the probability measure spaces and other one is on the hyperspace. We introduce a concept for these two spaces, which is called entropy order, and prove that it…

Dynamical Systems · Mathematics 2020-05-08 Yong Ji , Ercai Chen , Xiaoyao Zhou

It is well-known that the relativized variational principle established by Bogenschutz and Kifer connects the fiber topological entropy and fiber measure-theoretic entropy. In context of random dynamical systems, metric mean dimension was…

Dynamical Systems · Mathematics 2025-09-24 Yunping Wang , Ercai Chen , Kexiang Yang

This paper aims to investigate the thermodynamic formalism of weighted amenable topological pressure for factor maps of amenable group actions. Following the approach of Tsukamoto [\emph{Ergodic Theory Dynam. Syst.} \textbf{43}(2023),…

Dynamical Systems · Mathematics 2023-07-10 Jiao Yang , Ercai Chen , Rui Yang , Xiaoyi Yang

For random dynamical systems, by summarizing the fundamental properties of Kifer's topological pressure we introduce the concept of random pressure functions, and define Ruelle's metric entropy for invariant measures. Employing the…

Dynamical Systems · Mathematics 2026-05-19 Rui Yang , Ercai Chen , Xiaoyao Zhou

We develop entropy and variance results for the product of independent identically distributed random variables on Lie groups. Our results apply to the study of stationary measures in various contexts.

Probability · Mathematics 2026-02-03 Samuel Kittle , Constantin Kogler

In this short note, for countably infinite amenable group actions, we provide topological proofs for the following results: Bowen topological entropy (dimensional entropy) of the whole space equals the usual topological entropy along…

Dynamical Systems · Mathematics 2017-12-19 Dou Dou , Ruifeng Zhang

We prove that for a measure preserving action of a sofic group with positive sofic entropy, the set of points with finite stabilizer have positive measure. This extends results of Weiss and Seward for amenable groups and free groups,…

Dynamical Systems · Mathematics 2016-08-24 Tom Meyerovitch

In this paper, we introduce the notions of topological pressure and measure-theoretic entropy for a free semigroup action. Suppose that a free semigroup acts on a compact metric space by continuous self-maps. To this action, we assign a…

Dynamical Systems · Mathematics 2016-10-27 Xiaogang Lin , Dongkui Ma , Yupan Wang

We prove two relative local variational principles of topological pressure functions $P(T,\mathcal{F},\mathcal{U},y)$ and$P(T,\mathcal{F},\mathcal{U}|Y)$ for a given factor map $\pi$, an open cover $\mathcal{U} $ and a subadditive sequence…

Dynamical Systems · Mathematics 2009-09-14 Xianfeng Ma , Ercai Chen

The goal of this paper is to define and investigate those topological pressures, which is an extension of topological entropy presented by Feng and Huang [13], of continuous transformations. This study reveals the similarity between many…

Dynamical Systems · Mathematics 2013-08-05 Xinjia Tang , Wen-Chiao Cheng , Yun Zhao

In previous work, I introduced a measure-conjugacy invariant for sofic group actions called sofic entropy. Here it is proven that the sofic entropy of an amenable group action equals its classical entropy. The proof uses a new…

Dynamical Systems · Mathematics 2011-03-29 Lewis Bowen

In analogy to the topological entropy for continuous endomorphisms of totally disconnected locally compact groups, we introduce a notion of topological entropy for continuous endomorphisms of locally linearly compact vector spaces. We study…

Group Theory · Mathematics 2021-01-22 Ilaria Castellano , Anna Giordano Bruno