Ara mostrant els elements 1-5 de 5
Gutiérrez i Serrés, Pere (Data de defensa: 1995-06-02)
La memòria recull contribucions a diversos aspectes del problema de l'estabilitat en sistemes hamiltonians quasi-integrables. Aquests aspectes inclouen resultats d'estabilitat efectiva, que comporten ...
Bosch Gual, Miquel (Data de defensa: 1992-09-30)
L'objectiu del treball és mostrar que alguns aspectes de certs sistemes dinàmics discrets bidimensionals poden ser estudiats mitjançant sistemes de dimensió 1 que corresponen a casos particulars o ...
Tatjer i Montaña, Joan Carles (Data de defensa: 1990-03-01)
It is known that for the study of continuous dynamical systems the discret case plays an important role because, with it we can study the continuous one by using the Poincaré return map. In the discret ...
Jorba i Monte, Àngel (Data de defensa: 1991-10-11)
In this work we study several topics concerning quasi-periodic time-dependent perturbations of ordinary differential equations. This kind of equations appear as models in many applied problems of Celestial ...
Haro, Àlex (Data de defensa: 1998-10-02)
We have divided this thesis in four parts:<br/><br/>a) PART I: Exact symplectic geometry (introduction of the problems). This part contains the basic tools of symplectic geometry and outlines the four ...