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• Lindstedt series for lower dimensional tori ﻿

(1995)
Article
Accés obert
We consider the existence and effective computation of low-dimensional (less independent frequencies than degrees of freedom) invariant tori of a near-integrable system. Lindstedt method is a systematic procedure to compute ...
• On quasiperiodic perturbations of elliptic equilibrium points ﻿

(1995)
Article
Accés obert
This work focusses on quasiperiodic time-dependent perturbations of ordinary differential equations near elliptic equilibrium points. This means studying  \dot{x}=(A+\varepsilon Q(t,\varepsilon))x+\varepsilon ...