Integrability and strong normal forms for non-autonomous systems in a neighbourhood of an equilibrium
Abstract
The paper deals with the problem of existence of a convergent “strong” normal form in the neighbourhood of an equilibrium, for a finite dimensional system of differential equations with analytic and time-dependent non-linear terms. The problem can be solved either under some non-resonance hypotheses on the spectrum of the linear part or if the non-linear term is assumed to be (slowly) decaying in time. This paper “completes” a pioneering work of Pustyl’nikov in which, despite under weaker non-resonance hypotheses, the nonlinearity is required to be asymptotically autonomous. The result is obtained as a consequence of the existence of a strong normal form for a suitable class of real-analytic Hamiltonians with non-autonomous perturbations.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 01, 2016
- Source ID
- 10.1063/1.4962802
Entities
People
- Alessandro Fortunati
- Stephen Wiggins
Organizations
- Office of Naval Research
- University of Bristol