Abstract
We obtain new gauge-invariant forms of two-dimensional integrable systems of nonlinear equations: the Sawada-Kotera and Kaup-Kuperschmidt system, the generalized system of dispersive long waves, and the Nizhnik-Veselov-Novikov system. We show how these forms imply both new and well-known twodimensional integrable nonlinear equations: the Sawada-Kotera equation, Kaup-Kuperschmidt equation, dispersive long-wave system, Nizhnik-Veselov-Novikov equation, and modified Nizhnik-Veselov-Novikov equation. We consider Miura-type transformations between nonlinear equations in different gauges.
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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 160, No. 1, pp. 35–48, July, 2009.
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Dubrovsky, V.G., Gramolin, A.V. Gauge-invariant description of several (2+1)-dimensional integrable nonlinear evolution equations. Theor Math Phys 160, 905–916 (2009). https://doi.org/10.1007/s11232-009-0080-9
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DOI: https://doi.org/10.1007/s11232-009-0080-9