Solitary Waves and Periodic Waves in a Perturbed KdV Equation

• Li, Hong ^[1] ; Sun Hongquan ^[1] ; Zhu, Wenjing ^[2]
  1. [1] Jiujiang University

     Jiujiang University

     China

     
  2. [2] China Jiliang University

     China Jiliang University

     China

     
• Localización: Qualitative theory of dynamical systems, ISSN 1575-5460, Vol. 19, Nº 3, 2020
• Idioma: inglés
• DOI: 10.1007/s12346-020-00418-w
• Enlaces
  • Texto completo
• Resumen

  • In this paper, we consider a perturbed Korteweg–de Vries (KdV) equation with weak dissipation and Marangoni effects. Main attention is focused on the existence conditions of periodic and solitary wave solutions of the perturbed KdV equation. Based on bifurcation theory of dynamic system and geometric singular perturbation method, the parameter conditions and wave speed conditions for the existence of one periodic solution, one solitary solution and the coexistence of a solitary solution and infinite number of periodic solutions are given. By using Chebyshev criterion to analyze the ratio of Abelian integrals, the monotonicity of wave speed is proved, and the upper and lower bounds of wave speed are obtained.

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