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We study two variations of Bowen's definitions of topological entropy based on separated and spanning sets which can be applied to the study of discontinuous semiflows on compact metric spaces. We prove that these definitions reduce to…

Dynamical Systems · Mathematics 2018-05-14 Nelda Jaque , Bernardo San Martín

In arXiv:1801.01238 a variation of Bowen's topological entropy that can be applied to the study of discontinuous semiflows on compact metric spaces was introduced. The main novetly is the use of certain family of pseudosemimetrics…

Dynamical Systems · Mathematics 2019-09-24 Nelda Jaque , Bernardo San Martín

In [44], we qualitatively studied some classical results implied by the specification property for dynamical systems with non-uniform specification. In this paper, we perform quantitative studies on how properties of topological theory and…

Dynamical Systems · Mathematics 2025-08-26 Wanshan Lin , Xueting Tian , Chenwei Yu

Let $(X, \phi)$ be a compact metric flow without fixed points. We will be concerned with the entropy of flows which takes into consideration all possible reparametrizations of the flows. In this paper, by establishing the Brin-Katok's…

Dynamical Systems · Mathematics 2019-10-04 Yunping Wang , Ercai Chen , Ting Wu , Zijie Lin

Bowen showed that a continuous expansive map with specification has a unique measure of maximal entropy. We show that the conclusion remains true under weaker non-uniform versions of these hypotheses. To this end, we introduce the notions…

Dynamical Systems · Mathematics 2019-02-20 Vaughn Climenhaga , Daniel J. Thompson

In this paper, we mainly revisit a nice theory for topological entropy of weakly equivalent flows, which was originally investigated by Ohno in 1980. We will develop a new approach, being more straightforward and elementary than the…

Dynamical Systems · Mathematics 2026-02-27 Lei Jin , Yixiao Qiao

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…

Dynamical Systems · Mathematics 2024-10-29 Maysam Maysami Sadr , Mina Shahrestani

Since seminal work of Bowen, it has been known that the specification property implies various useful properties about a topological dynamical system, among them uniqueness of the measure of maximal entropy (often referred to as intrinsic…

Dynamical Systems · Mathematics 2014-11-11 Ronnie Pavlov

Two flows defined on a smooth manifold are equivalent if there exists a homeomorphism of the manifold that sends each orbit of one flow onto an orbit of the other flow while preserving the time orientation. The topological entropy of a flow…

Dynamical Systems · Mathematics 2011-12-02 Wenxiang Sun , Todd Young , Yunhua Zhou

In this article we study the regularity of the topological and metric entropy of partially hyperbolic flows with two-dimensional center direction. We show that the topological entropy is upper semicontinuous with respect to the flow, and we…

Dynamical Systems · Mathematics 2018-11-05 Mario Roldán , Radu Saghin , Jiagang Yang

Using an approach due to Bowen, Franco showed that continuous expansive flows with specification have unique equilibrium states for potentials with the Bowen property. We show that this conclusion remains true using weaker non-uniform…

Dynamical Systems · Mathematics 2017-10-25 Vaughn Climenhaga , Daniel J. Thompson

In this paper, we study ergodic optimization of continuous functions for flows by concentrating on the entropy spectrum of their maximizing measures. Precisely, over a wide family of flows with non-uniformly hyperbolic structure, we obtain…

Dynamical Systems · Mathematics 2026-02-09 Qiao Liu , Tianyu Wang , Weisheng Wu

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…

Dynamical Systems · Mathematics 2007-05-23 Boris Hasselblatt , Zbigniew Nitecki , James Propp

We construct a family of shift spaces with almost specification and multiple measures of maximal entropy. This answers a question from Climenhaga and Thompson [Israel J. Math. 192 (2012), no. 2, 785--817]. Elaborating on our examples we…

Dynamical Systems · Mathematics 2014-11-10 Dominik Kwietniak , Piotr Oprocha , Michał Rams

We study nontrivial entropy invariants in the class of parabolic flows on homogeneous spaces, quasi-unipotent flows. We show that topological complexity (ie, slow entropy) can be computed directly from the Jordan block structure of the…

Dynamical Systems · Mathematics 2019-08-27 Adam Kanigowski , Kurt Vinhage , Daren Wei

In this paper, we continue our investigation on sub-additive pressures for $C^1$-smooth partially hyperbolic diffeomorphisms. Under the assumption of unstable almost product property, we show that the unstable Bowen topological pressure on…

Dynamical Systems · Mathematics 2022-03-22 Wenda Zhang , Zhiqiang Li , Xiankun Ren

We study suspension flows defined over sub-shifts of finite type with continuous roof functions. We prove the existence of suspension flows with uncountably many ergodic measures of maximal entropy. More generally, we prove that any…

Dynamical Systems · Mathematics 2021-08-16 Godofredo Iommi , Anibal Velozo

Motivated by the notion of intermediate dimensions introduced by Falconer et al., we introduce a continuum of topological entropies that are intermediate between the (Bowen) topological entropy and the lower and upper capacity topological…

Dynamical Systems · Mathematics 2026-05-05 Yujun Ju

This paper defines and discusses the dimension notion of topological slow entropy of any subset for Z^d actions. Also, the notion of measure-theoretic slow entropy for Z^d actions is presented, which is modified from Brin and Katok [2].…

Dynamical Systems · Mathematics 2011-11-28 De-Peng Kong , Er-Cai Chen

Co-compact entropy is introduced as an invariant of topological conjugation for perfect mappings defined on any Hausdorff space(compactness and metrizability not necessarily required). This is achieved through the consideration of…

Dynamical Systems · Mathematics 2015-06-12 Zheng Wei , Yangeng Wang , Guo Wei
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