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Various aspects of the dynamics of the cubic Szegö solutions

By Sandrine Grellier

Also appears in collection : Asymptotic analysis of evolution equations / Analyse asymptotique des équations d'évolution

The cubic Szegö equation has been introduced as a toy model for totally non dispersive evolution equations. It turned out that it is a complete integrable Hamiltonian system for which we built a non linear Fourier transform giving an explicit expression of the solutions. This explicit formula allows to study the dynamics of the solutions. We will explain different aspects of it: almost-periodicity of the solutions in the energy space, uniform analyticity for a large set of initial data, turbulence phenomenon for a dense set of smooth initial data in large Sobolev spaces. From joint works with Patrick Gérard.

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Citation data

  • DOI 10.24350/CIRM.V.19192503
  • Cite this video Grellier, Sandrine (05/07/2017). Various aspects of the dynamics of the cubic Szegö solutions. CIRM. Audiovisual resource. DOI: 10.24350/CIRM.V.19192503
  • URL https://dx.doi.org/10.24350/CIRM.V.19192503

Bibliography

  • Gérard, P., & Grellier, S. (2017). The cubic Szegö equation and Hankel operators. Astérisque 389. Paris: Société Mathématique de France - http://dx.doi.org/10.24033/ast.1014
  • Gérard, P., & Grellier, S. (2016). On the growth of Sobolev norms for the cubic Szegö equation. Séminaire Laurent Schwartz. EDP et Applications 2014-2015, Exp. No. 11 - http://dx.doi.org/10.5802/slsedp.70

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