Almost global existence for Hamiltonian
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D. Bambusi; J.-M. Delort; B. GrΓ©bert; J. Szeftel
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Article
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2007
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John Wiley and Sons
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English
β 207 KB
π 1 views
## Abstract This paper is devoted to the proof of almost global existence results for KleinβGordon equations on Zoll manifolds (e.g., spheres of arbitrary dimension) with Hamiltonian nonlinearities, when the Cauchy data are smooth and small. The proof relies on Birkhoff normal form methods and on t