Shadowing, sensitivity, and entropy points

Abstract For continuous self-maps of compact metric spaces, we explore the relationship among the shadowable points, sensitive points, and entropy points. Specifically, we show that (1) if the set of shadowable points is dense in the phase space, then any interior point of the set of sensitive points is an entropy point; and (2) if the topological entropy is zero, then the denseness of the set of shadowable points is equivalent to almost chain continuity. In addition, we present a counter-example to a question raised by Ye and Zhang regarding entropy points.

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Publication Details

Journal
Canadian Mathematical Bulletin
Published
2025-09-18
DOI
https://doi.org/10.4153/s0008439525101239
Primary Topic
Mathematical Dynamics and Fractals
Type
article
Field-Weighted Citation Impact
0.00
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article

Shadowing, sensitivity, and entropy points

Noriaki Kawaguchi
Canadian Mathematical Bulletin
Mathematical Dynamics and Fractals
article

Shadowing, sensitivity, and entropy points

Noriaki Kawaguchi
article en

Abstract

Abstract For continuous self-maps of compact metric spaces, we explore the relationship among the shadowable points, sensitive points, and entropy points. Specifically, we show that (1) if the set of shadowable points is dense in the phase space, then any interior point of the set of sensitive points is an entropy point; and (2) if the topological entropy is zero, then the denseness of the set of shadowable points is equivalent to almost chain continuity. In addition, we present a counter-example to a question raised by Ye and Zhang regarding entropy points.

Canadian Mathematical Bulletin
Shanghai Institute for Science of Science (CN), Institute of Science Tokyo (JP)
Openalex Percentile: Top 68%
Mathematical Dynamics and Fractals
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