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Abstract
In the paper by D. Burago, S. Ivanov and A. Novikov, “A survival guide for feeble fish”, it has been shown that a fish with limited velocity can reach any point in the (possibly unbounded) ocean provided that the fluid velocity field is incompressible, bounded and has vanishing mean drift. This result extends some known global controllability theorems though being substantially nonconstructive. We give a fish a different recipe of how to survive in a turbulent ocean, and show its relationship to structural stability of dynamical systems by providing a constructive way to change slightly the velocity field to produce conservative (in the sense of not having wandering sets of positive measure) dynamics. In particular, this leads to the extension of C. Pugh’s closing lemma to incompressible vector fields over unbounded domains. The results are based on an extension of the Poincaré recurrence theorem to some σ -finite measures and on specially constructed Newtonian potentials.
Citations
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Authors (2)
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-
Eugene Stepanov Prof.
- St. Petersburg Branch of the Steklov Mathematical Institute of the Russian Academy of Sciences, Russia
Cite as
Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jde.2019.04.010
- License
- Copyright (2019 Elsevier Inc)
Keywords
Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
JOURNAL OF DIFFERENTIAL EQUATIONS
no. 267,
pages 3442 - 3474,
ISSN: 0022-0396 - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Kryzhevich S., Stepanov E.: The saga of a fish: from a survival guide to closing lemmas// JOURNAL OF DIFFERENTIAL EQUATIONS -, (2019), s.3442-3474
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jde.2019.04.010
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
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