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• #### Exponentially small estimates for KAM theorem near an elliptic equilibrium point ﻿

(1997)
Article
Open Access
We give a precise statement of KAM theorem for a Hamiltonian system in a neighborhood of an elliptic equilibrium point. If the frequencies of the elliptic point satisfy a Diophantine condition, with exponent $\tau$, and ...
• #### Teoria Kam Sin Coordenadas Accion-Angulo ﻿

(2001)
Article
Open Access
The classical KAM methods, strongly supported on the use of canonical trans- formations in the action-angle context, are not effcient to be applied to a wide range of systems in which the Hamiltonian is known (for instance) ...