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Transverse nonlinear instability for two-dimensional dispersive models

F. Rousset, N. Tzvetkov

math.AParXiv:math/0612494

Abstract

We present a method to prove nonlinear instability of solitary waves in dispersive models. Two examples are analyzed: we prove the nonlinear long time instability of the KdV solitary wave (with respect to periodic transverse perturbations) under a KP-I flow and the transverse nonlinear instability of solitary waves for the cubic nonlinear Schrödinger equation.

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