On the Stability of Periodic Solutions of the Generalized Benjamin-Bona-Mahony Equation

Details On the Stability of Periodic Solutions of the Generalized Benjamin-Bona-Mahony Equation On the Stability of Periodic Solutions of the Generalized Benjamin-Bona-Mahony Equation

2009-08-03

arxiv.org/abs/0908.0277v1

Mathematics

Analysis of PDEs

27 pages, 3 figures

Scientific paper

We study the stability of a four parameter family of spatially periodic traveling wave solutions of the generalized Benjamin-Bona-Mahony equation to two classes of perturbations: periodic perturbations with the same periodic structure as the underlying wave, and long-wavelength localized perturbations. In particular, we derive necessary conditions for spectral instability to perturbations to both classes of perturbations by deriving appropriate asymptotic expansions of the periodic Evans function, and we outline a nonlinear stability theory to periodic perturbations based on variational methods which effectively extends our periodic spectral stability results.

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