K. Narita, NEW SOLUTIONS FOR DIFFERENCE-DIFFERENCE MODELS OF THE PHI(4) EQUATIONAND NONLINEAR KLEIN-GORDON EQUATION IN 1-DIMENSION(1), Chaos, solitons and fractals, 7(3), 1996, pp. 365-369
We present a new solution for Hirota's difference-difference model of
the phi(4) equation in 1+1 dimension, extending Hirota's kink solution
. We also present three new solutions for a difference-difference mode
l of the nonlinear Klein-Gordon equation. We discuss asymptotic behavi
ours of these solutions in small limits of the lattice spacing.