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MiS Preprint

Numerical study of a multiscale expansion of KdV and Camassa-Holm equation

Tamara Grava and Christian Klein


We study numerically solutions to the Korteweg-de Vries and Camassa-Holm equation close to the breakup of the corresponding solution to the dispersionless equation. The solutions are compared with the properly rescaled numerical solution to a fourth order ordinary differential equation, the second member of the Painlevé I hierarchy. It is shown that this solution gives a valid asymptotic description of the solutions close to breakup. We present a detailed analysis of the situation and compare the Korteweg-de Vries solution quantitatively with asymptotic solutions obtained via the solution of the Hopf and the Whitham equations. We give a qualitative analysis for the Camassa-Holm equation.

MSC Codes:
54C40, 14E20, 46E25, 20C20
differential geometry, algebraic geometry

Related publications

2008 Repository Open Access
Tamara Grava and Christian Klein

Numerical study of a multiscale expansion of the Korteweg-de-Vries and Camassa-Holm equation

In: Integrable systems and random matrices : in honor of Percy Deift ; Conference on Integrable Systems, Random Matrices, and Applications in Honor of Percy Deift's 60th birthday, May 22 - 26, 2006, Courant Institute of Mathematical Sciences, New Yor University / Jinho Baik (ed.)
Providence, RI : American Mathematical Society, 2008. - pp. 81-98
(Contemporary mathematics ; 458)