Nonresonant smooth integrable Hamiltonian systems which don't admit a local smooth Birkhoff normal form

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/64581This small note has been withdrawn by the author. The main result of the note, with a corrected proof written in collaboration with a collegue, will be part of a joint work.3 pagesDynamical Systems70X00Nonresonant smooth integrable Hamiltonian systems which don't admit a local smooth Birkhoff normal formtext