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Séminaire du département Automatique du 03/03/2016 à 14h00


Asymptotic stability of a Korteweg-de Vries equation with a two-dimensional center manifold

Intervenant : Shuxia Tang, UC San Diego

Lieu : B208


Résumé :

Local asymptotic stability analysis is conducted for an initial-boundary-value problem of a Korteweg-de-Vries equation posed on a finite interval ($0,2 \pi \sqrt{7/3}$). The equation comes with a Dirichlet boundary condition at the left end-point and both of the Dirichlet and Neumann homogeneous boundary conditions at the right endpoint. It is known that the associated linearized equation around the origin is not asymptotically stable. In this paper, the nonlinear Korteweg-de Vries equation is proved to be locally asymptotically stable around the origin through the center manifold method. In particular, the existence of a two-dimensional local center manifold is presented, which is locally exponentially attractive. By analyzing the Korteweg-de Vries equation restricted on the local center manifold, a polynomial decay rate of the solution is obtained.

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