MPEJ Volume 9, No. 1, 15 pp.
Received: Feb 28, 2003. Accepted: Apr 14, 2003.
Paolo Perfetti
A KAM theorem for infinite--dimensional discrete systems
ABSTRACT: Infinite--dimensional, discrete hamiltonian systems of the
type kinetic energy + potential energy over ${\Bbb R}^{{\Bbb Z}}\times
{\Bbb T}^{{\Bbb Z}}$ are studied. The existence of many
quasi--periodic motions with a maximal set of nonzero frequencies is
shown.
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