The random case of Conley's theorem: II. The complete Lyapunov function

Details The random case of Conley's theorem: II. The complete Lyapunov function The random case of Conley's theorem: II. The complete Lyapunov function

2007-10-30

arxiv.org/abs/0710.5683v1

Nonlinearity 20 (2007), 1017--1030

Mathematics

Dynamical Systems

14 pages, no figure

Scientific paper

10.1088/0951-7715/20/4/012

Conley in \cite{Con} constructed a complete Lyapunov function for a flow on compact metric space which is constant on orbits in the chain recurrent set and is strictly decreasing on orbits outside the chain recurrent set. This indicates that the dynamical complexity focuses on the chain recurrent set and the dynamical behavior outside the chain recurrent set is quite simple. In this paper, a similar result is obtained for random dynamical systems under the assumption that the base space $(\Omega,\mathcal F,\mathbb P)$ is a separable metric space endowed with a probability measure. By constructing a complete Lyapunov function, which is constant on orbits in the random chain recurrent set and is strictly decreasing on orbits outside the random chain recurrent set, the random case of Conley's fundamental theorem of dynamical systems is obtained. Furthermore, this result for random dynamical systems is generalized to noncompact state spaces.

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