Abstract
We consider a deformation of the Whitham system for the nonlinear Klein-Gordon equation. This deformation has a Lorentz-invariant form. Using the Lagrangian formalism of the original system, we obtain the first nontrivial correction to the Whitham system in the Lorentz-invariant approach.
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Translated from Funktsional’nyi Analiz i Ego Prilozheniya, Vol. 42, No. 2, pp. 28–43, 2008
Original Russian Text Copyright © by A. Ya. Maltsev
The work was partially supported by the grant of President of Russian Federation (MD-8906.2006.2) and Russian Science Support Foundation.
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Maltsev, A.Y. The Lorentz-invariant deformation of the Whitham system for the nonlinear Klein-Gordon equation. Funct Anal Its Appl 42, 103–115 (2008). https://doi.org/10.1007/s10688-008-0016-4
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DOI: https://doi.org/10.1007/s10688-008-0016-4