Exact solutions of coupled nonlinear evolution equations

In this paper, we employ the tanh method for traveling wave solutions of coupled Ramani and Nizhnik-Novikov-Veselov equations. Based on the idea of the tanh method, a simple and efficient method is proposed to obtain exact solutions to the nonlinear evolution equations. The solutions obtained may be of importance in the explanation of some practical problems in physics. (c) 2006 Elsevier Ltd. All rights reserved.