Birkhoff Normal Form and Hamiltonian PDEs

Details Birkhoff Normal Form and Hamiltonian PDEs Birkhoff Normal Form and Hamiltonian PDEs

2006-04-06

arxiv.org/abs/math/0604132v2

Mathematics

Analysis of PDEs

55 pages

Scientific paper

These notes are based on lectures held at the Lanzhou university (China) during a CIMPA summer school in july 2004 but benefit from recent devellopements. Our aim is to explain some perturbations technics that allow to study the long time behaviour of the solutions of Hamiltonian perturbations of integrable systems. We are in particular interested with stability results. Our approach is centered on the Birkhoff normal form theorem that we first proved in finite dimension. Then, after giving some exemples of Hamiltonian PDEs, we present an abstract Birkhoff normal form theorem in infinite dimension and discuss the dynamical consequences for Hamiltonian PDEs.

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