A remark about the justification of the nonlinear Schrödinger equation in quadratic spatially periodic media
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We prove the validity of a technical assumption necessary in a proof of the validity of the nonlinear Schrödinger equation as envelope equation in quadratic spatially periodic media.
Mathematics Subject Classiffication (2000).34C20 35L05 35Q60
Keywords.Normalform transformation Bloch wave interaction
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© Birkhaeuser 2007