Abstract
Ermakov-type systems in 2 + 1-dimensions are introduced. Multi-wave solutions of a 2 + 1-dimensional Pinney equation and a modulated 2 + 1-dimensional sine-Gordon equation are constructed via the standard Ermakov system. Lie group analysis of the latter is undertaken to reveal its underlying linear structure in terms of canonical coordinates. In conclusion, a 2 + 1-dimensional nonlinear system due to Stoker which arises in two-layer shallow water theory is shown to admit a symmetry reduction to a Ermakov system.
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Rogers, C., Hoenselaers, C., Ramgulam, U. (1993). Ermakov Structure in 2 + 1-Dimensional Systems. Canonical Reduction. In: Ibragimov, N.H., Torrisi, M., Valenti, A. (eds) Modern Group Analysis: Advanced Analytical and Computational Methods in Mathematical Physics. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2050-0_34
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DOI: https://doi.org/10.1007/978-94-011-2050-0_34
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