Normal forms, stability and splitting of invariant manifolds II. Finitely differentiable Hamiltonians

Abed Bounemoura (1)

1 CRM - Centre de Recerca Matemàtica

This paper is a sequel to ''Normal forms, stability and splitting of invariant manifolds I. Gevrey Hamiltonians", in which we gave a new construction of resonant normal forms with an exponentially small remainder for near-integrable Gevrey Hamiltonians at a quasi-periodic frequency, using a method of periodic approximations. In this second part we focus on finitely differentiable Hamiltonians, and we derive normal forms with a polynomially small remainder. As applications, we obtain a polynomially large upper bound on the stability time for the evolution of the action variables and a polynomially small upper bound on the splitting of invariant manifolds for hyperbolic tori.

Domaines: Systèmes dynamiques [math.DS]

Abed Bounemoura. Normal forms, stability and splitting of invariant manifolds II. Finitely differentiable Hamiltonians. Regular and Chaotic Dynamics, 2013, 18 (3), pp.261-276. ⟨hal-00761674⟩