Abstract
We study nonlinear orbital stability and instability of the set of ground state solitary wave solutions of a one-dimensional Boussinesq equation or one-dimensional Benney–Luke equation. It is shown that a solitary wave (traveling wave with finite energy) may be orbitally stable or unstable depending on the range of the wave's speed of propagation.
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Quintero, J.R. Nonlinear Stability of a One-Dimensional Boussinesq Equation. Journal of Dynamics and Differential Equations 15, 125–142 (2003). https://doi.org/10.1023/A:1026109529292
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DOI: https://doi.org/10.1023/A:1026109529292