On some properties of the local entropy of dynamical systems unwinded as a function of a point in the phase space

The article studies the nature of the dependence on the local entropy point of a non-autonomous dynamical system. It is proved that the local entropy is a function of the second Baire class on the phase space, and its set of lower semicontinuity points forms an everywhere dense set of type $G_\delta$. An autonomous dynamical system is constructed such that the set of above semicontinuity points of the local entropy of this system is empty.

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Publication Details

Journal
Vestnik Udmurtskogo Universiteta Matematika Mekhanika Komp yuternye Nauki
Published
2025-06-20
DOI
https://doi.org/10.35634/vm250202
Primary Topic
Mathematical Dynamics and Fractals
Type
article
Field-Weighted Citation Impact
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article

On some properties of the local entropy of dynamical systems unwinded as a function of a point in the phase space

А. Н. Ветохин
Vestnik Udmurtskogo Universiteta Matematika Mekhanika Komp yuternye Nauki
Mathematical Dynamics and Fractals
article

On some properties of the local entropy of dynamical systems unwinded as a function of a point in the phase space

А. Н. Ветохин
article en

Abstract

The article studies the nature of the dependence on the local entropy point of a non-autonomous dynamical system. It is proved that the local entropy is a function of the second Baire class on the phase space, and its set of lower semicontinuity points forms an everywhere dense set of type $G_\delta$. An autonomous dynamical system is constructed such that the set of above semicontinuity points of the local entropy of this system is empty.

Vestnik Udmurtskogo Universiteta Matematika Mekhanika Komp yuternye NaukiVol. 35(2)
Lomonosov Moscow State University (RU), Moscow State University (TJ)
Openalex Percentile: Top 79%
Mathematical Dynamics and Fractals
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