Application of Exp-function method for (3+1)-dimensional nonlinear evolution equations

In this paper, the Exp-function method is used to construct solitary and periodic solutions of nonlinear partial differential equations. We choose an example, which includes Kadomstev-Petviashvili equation and potantial-YTSF equation, to illustrate the method. The method is straightforward and concise, and its applications are promising. The Exp-function method presents a wider applicability for handling nonlinear wave equations. (C) 2008 Elsevier Ltd. All rights reserved.