Nonresonant smooth integrable Hamiltonian systems which don't admit a local smooth Birkhoff normal form
classification
🧮 math.DS
keywords
notesmoothadmitauthorbeenbirkhoffcollaborationcollegue
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This small note has been withdrawn by the author.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.
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