Perturbation Theory for the Double-Sine-Gordon Equation

Abstract

This paper presents the perturbation theory for the double--sine--Gordon equation. We received the system of differential equations that shows the soliton parameters modification under perturbation's influence. In particular case $\lambda =0$ the results of the research transform into well-known perturbation theory for the sine--Gordon equation.

LaTeX, 7 pages, 3 figures