Perturbation Theory of the Double Sine-Gordon Equation
A general perturbation theory has recently been developed by KAUP and NEWELL  for dealing with almost completely integrable nonlinear partial differential equations, for which conventional inverse scattering transform (IST) techniques are inapplicable. One such equation is the double sine-Gordon equation (DSGE).
KeywordsReflection Coefficient Rest Frame Nonlinear Partial Differential Equation Oscillatory Regime Singular Perturbation Theory
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