Simon i Estrada, Sergi (Date of defense: 2007-07-09)
In this thesis, we present a proof of the meromorphic non-integrability for some problems arising from Celestial Mechanics, as well as a new necessary condition for partial integrability in a wider ...
Jorba i Monte, Àngel (Date of defense: 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 ...