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Soliton resolution for derivative NLS equation - Sulem, Catherine (Auteur de la Conférence) | CIRM H

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We consider the Derivative Nonlinear Schrödinger equation for general initial conditions in weighted Sobolev spaces that can support bright solitons (but exclude spectral singularities). We prove global wellposedness and give a full description of the long-time behavior of the solutions in the form of a finite sum of localized solitons and a dispersive component. Our analysis provides explicit formulae for the multi-soliton component as well as the correction dispersive term. We use the inverse scattering approach and the nonlinear steepest descent method of Deift and Zhou (1993) revisited by the $\bar{\partial}$-analysis of Dieng-McLaughlin (2008) and complemented by the recent work of Borghese-Jenkins-McLaughlin (2016) on soliton resolution for the focusing nonlinear Schrödinger equation. This is a joint work with R. Jenkins, J. Liu and P. Perry.[-]
We consider the Derivative Nonlinear Schrödinger equation for general initial conditions in weighted Sobolev spaces that can support bright solitons (but exclude spectral singularities). We prove global wellposedness and give a full description of the long-time behavior of the solutions in the form of a finite sum of localized solitons and a dispersive component. Our analysis provides explicit formulae for the multi-soliton component as well as ...[+]

35Q55 ; 37K15 ; 37K40 ; 35P25 ; 35A01

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I will report on joint work with Ifrim and Tataru on the asymptotics of small localized solutions to the Korteweg-de Vries equation up to a quartic time scale. Tools are conserved energies, energy estimates and Klainerman Sobolev inequalities. The difficulty of the problem comes from various resonances.

35Q53 ; 37K40

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