Ara es mostren els items 38-42 de 42

    • Quantitative estimates on the normal form around a non semi-simple 1:-1 resonant periodic orbit 

      Ollé Torner, Mercè; Pacha Andújar, Juan Ramón; Villanueva Castelltort, Jordi (2003)
      Article
      Accés obert
      The purpose of thiswork is to give precise estimates for the size of the remainder of the normalized Hamiltonian around a non-semi-simple 1 : −1 resonant periodic orbit, as a function of the distance to the orbit. We ...
    • Quasi-periodic response solutions at normal-internal resonances 

      Broer, H. W.; Hanssmann, Heinz; Jorba, Angel; Villanueva Castelltort, Jordi; Wagener, Florian (2003)
      Article
      Accés obert
      In the conservative dynamics of certain quasi-periodically forced oscillators, normal-internal resonances are considered in a bifurcational setting. The unforced system is a one degree of freedom oscillator, under forcing ...
    • Stability and asymptotic behaviour of the vertical family of periodic orbits around L_5 of the restricted three-body problem 

      Jorba, Angel; Villanueva Castelltort, Jordi (1997)
      Article
      Accés obert
      In this work we study some numerical results about a family of periodic orbits of the Restricted Three Body Problem (RTBP). The family considered is one of the Lyapunov families related to the equlibrium point $L_5$. More ...
    • Teoria Kam Sin Coordenadas Accion-Angulo 

      González, Alejandra; Jorba, Angel; Llave Canosa, Rafael de la; Villanueva Castelltort, Jordi (2001)
      Article
      Accés obert
      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) ...
    • The fine geometry of the Cantor families of invariant tori in hamiltonian systems 

      Jorba, Angel; Villanueva Castelltort, Jordi (2000)
      Article
      Accés obert
      This work focuses on the dynamics around a partially elliptic, lower dimensional torus of a real analytic Hamiltonian system. More concretely, we investigate the abundance of invariant tori in the directions of the phase ...