Asymptotic and Lyapunov stability of Poisson equilibria

Details Asymptotic and Lyapunov stability of Poisson equilibria Asymptotic and Lyapunov stability of Poisson equilibria

2004-04-26

arxiv.org/abs/math/0404462v1

Mathematics

Dynamical Systems

23 pages, 2 figures

Scientific paper

This paper includes results centered around three topics, all of them related with the nonlinear stability of equilibria in Poisson dynamical systems. Firstly, we prove an energy-Casimir type sufficient condition for stability that uses functions that are not necessarily conserved by the flow and that takes into account certain asymptotically stable behavior that may occur in the Poisson category. This method is adapted to Poisson systems obtained via a reduction procedure and we show in examples that the kind of stability that we propose is appropriate when dealing with the stability of the equilibria of some constrained systems. Finally, we discuss two situations in which the use of continuous Casimir functions in stability studies is equivalent to the topological stability methods introduced by Patrick {\it et al.}

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