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Statistical determinism in non-Lipschitz dynamical systems

Part of: Dynamical systems with hyperbolic behavior Equations and systems with randomness Random dynamical systems

Published online by Cambridge University Press:  11 October 2023

THEODORE D. DRIVAS Open the ORCID record for THEODORE D. DRIVAS [Opens in a new window] ,
ALEXEI A. MAILYBAEV Open the ORCID record for ALEXEI A. MAILYBAEV [Opens in a new window]  and
ARTEM RAIBEKAS
THEODORE D. DRIVAS
Affiliation:
Department of Mathematics, Stony Brook University, Stony Brook, NY 11794, USA (e-mail: tdrivas@math.stonybrook.edu)
ALEXEI A. MAILYBAEV*
Affiliation:
Instituto de Matemática Pura e Aplicada, Rio de Janeiro, Brazil
ARTEM RAIBEKAS
Affiliation:
Instituto de Matemática e Estatística, Universidade Federal Fluminense, Niterói, Brazil (e-mail: artemr@id.uff.br)
*
e-mail: alexei@impa.br
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Abstract

We study a class of ordinary differential equations with a non-Lipschitz point singularity that admits non-unique solutions through this point. As a selection criterion, we introduce stochastic regularizations depending on a parameter $\nu $: the regularized dynamics is globally defined for each $\nu> 0$, and the original singular system is recovered in the limit of vanishing $\nu $. We prove that this limit yields a unique statistical solution independent of regularization when the deterministic system possesses a chaotic attractor having a physical measure with the convergence to equilibrium property. In this case, solutions become spontaneously stochastic after passing through the singularity: they are selected randomly with an intrinsic probability distribution.

Keywords

singular dynamical systemsnon-Lipschitz differential equationsspontaneous stochasticity

MSC classification

Primary: 34F05: Equations and systems with randomness
Secondary: 37H05: Foundations, general theory of cocycles, algebraic ergodic theory 37D45: Strange attractors, chaotic dynamics
Type
Original Article
Information
Ergodic Theory and Dynamical Systems , Volume 44 , Issue 7 , July 2024 , pp. 1856 - 1884
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Copyright
© The Author(s), 2023. Published by Cambridge University Press

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