Generic Nekhoroshev theory without small divisors

Details Generic Nekhoroshev theory without small divisors Generic Nekhoroshev theory without small divisors

2009-12-18

arxiv.org/abs/0912.3725v2

Mathematics

Dynamical Systems

Scientific paper

In this article, we present a new approach of Nekhoroshev theory for a generic unperturbed Hamiltonian which completely avoids small divisors problems. The proof is an extension of a method introduced by P. Lochak which combines averaging along periodic orbits with simultaneous Diophantine approximation and uses geometric arguments designed by the second author to handle generic integrable Hamiltonians. This method allows to deal with generic non-analytic Hamiltonians and to obtain new results of generic stability around linearly stable tori.

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