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Group classification and exact solutions of a class of nonlinear waves

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  • Ndogmo, J.C.

Abstract

We apply an extension of a new method of group classification to a family of nonlinear wave equations labelled by two arbitrary functions, each depending on its own argument. The results obtained confirm the efficiency of the proposed method for group classification, termed the method of indeterminates. A model equation from the classified family of fourth order Lagrange equations is singled out. Travelling wave solutions of the latter are found through a similarity reduction by variational symmetry operators, followed by a double order reduction into a second order ordinary differential equation. Multi-soliton solutions and other exact solutions are also found by various methods including Lie group and Hirota methods. The most general action of the full symmetry group on any given solution is provided. Some remarkable facts on Lagrange equations emerging from the whole study are outlined.

Suggested Citation

  • Ndogmo, J.C., 2023. "Group classification and exact solutions of a class of nonlinear waves," Applied Mathematics and Computation, Elsevier, vol. 443(C).
    • Handle: RePEc:eee:apmaco:v:443:y:2023:i:c:s0096300322008372
    DOI: 10.1016/j.amc.2022.127769
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    References listed on IDEAS

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    1. Anwar Ja’afar Mohamad Jawad, 2017. "Three Different Methods for New Soliton Solutions of the Generalized NLS Equation," Abstract and Applied Analysis, Hindawi, vol. 2017, pages 1-8, October.
    2. J. C. Ndogmo & Victor Kovtunenko, 2021. "Group Classification and Conservation Laws of a Class of Hyperbolic Equations," Abstract and Applied Analysis, Hindawi, vol. 2021, pages 1-13, August.
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