Copyright © 2011 SciRes. AM Expanding the Tanh-Function Method for Solving Nonlinear Equations

In this paper, using the tanh-function method, we introduce a new approach to solitary wave solutions for solving nonlinear PDEs. The proposed method is based on adding integration constants to the resulting non-linear ODEs from the nonlinear PDEs using the wave transformation. Also, we use a transformation related to those integration constants. Some examples are considered to find their exact solutions such as KdV-Burgers class and Fisher, Boussinesq and Klein-Gordon equations. Moreover, we discuss the geometric in-terpretations of the resulting exact solutions