Recent developments in perturbation theory of classical hamiltonian systems
by Antonio Giorgilli

Abstract: The methods of classical perturbation theory are revisited in the light of a rigorous algebraic approach and of Nekhoroshev's theorem on stability over exponentially large times. The applications to the restricted three body problem and to a statistical model of a diatomic gas of identical molecules are illustrated, with the aim of giving good estimates for the size of the stability region and for the dependence on the number of degrees of freedom.

Nonlinear dynamics, G. Turchetti ed., pp 30-43, World Scientific (1989)

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