Abstract
This paper is concerned with the derivative nonlinear Schrödinger equation with periodic boundary conditions. We obtain complete Birkhoff normal form of order six. As an application, the long time stability for solutions of small amplitude is proved.
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The author is grateful to the referees for their valuable comments and suggestions.
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Supported by NNSFC (Grant Nos. 11671280, 11822108) and Fok Ying Tong Education Foundation (Grant No. 161002)
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Liu, J.J. Birkhoff Normal Form for the Derivative Nonlinear Schrödinger Equation. Acta. Math. Sin.-English Ser. 38, 249–262 (2022). https://doi.org/10.1007/s10114-022-0472-4
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DOI: https://doi.org/10.1007/s10114-022-0472-4