Exponential function rational expansion method for nonlinear differential-difference equations

An exponential function rational expansion method for solving exact traveling wave solutions to nonlinear differential difference equations is proposed. By this method, new exact traveling wave solutions to some nonlinear differential difference equations such as Langmiuir lattice, discrete mKdV lattice equation, Hybrid lattice equation, etc., are obtained. (C) 2007 Elsevier Ltd. All rights reserved.