03-209 Paolo Perfetti
A KAM theorem for infinite--dimensional discrete systems (325K, ps) May 5, 03
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Abstract. Infinite--dimesional, 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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