Initial boundary value problems for nonlinear dispersive wave equations |
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Authors: | Joachim Escher |
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Institution: | a Institute for Applied Mathematics, Leibniz University of Hanover, D-30167 Hanover, Germany b Department of Mathematics, Sun Yat-sen University, 510275 Guangzhou, China |
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Abstract: | In this paper we study initial value boundary problems of two types of nonlinear dispersive wave equations on the half-line and on a finite interval subject to homogeneous Dirichlet boundary conditions. We first prove local well-posedness of the rod equation and of the b-equation for general initial data. Furthermore, we are able to specify conditions on the initial data which on the one hand guarantee global existence and on the other hand produce solutions with a finite life span. In the case of finite time singularities we are able to describe the precise blow-up scenario of breaking waves. Our approach is based on sharp extension results for functions on the half-line or on a finite interval and several symmetry preserving properties of the equations under discussion. |
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Keywords: | The Camassa-Holm equation and the rod equation The Degasperis-Procesi equation and the b-equation Initial boundary value problems Local well-posedness Blow-up Global existence |
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