# metadata.dc.description.abstract[].value
KAM theorem doesn't ensure stability for dynamical systems close to integrable Hamiltonian systems when the dimension of the phase space is more than four . In this case, irregular unstable orbits may occur, arbitrarily close to stable invariant tori . This is the Arnold diffusion . We study here some suf£icient conditions which guarantee the existence of this diffusion .

# metadata.dc.relation.ispartof[].value
Publicacions Matemàtiques, 1980, vol. 22, p. 27-30

# metadata.dc.rights[].value
(c) Universitat Autònoma de Barcelona, 1980

# metadata.dc.source[].value
Articles publicats en revistes (Matemàtiques i Informàtica)