eng Science and Education Publishing American Journal of Applied Mathematics and Statistics 2328-7292 2013-09-17 1 1 64 70 10.12691/ajams-1-4-3 AJAMS2013143 article Hasibun Naher hasibun06tasauf@gmail.com 1 2 Farah Aini Abdullah 2 School of Mathematical Sciences, Universiti Sains Malaysia,Penang, Malaysia In this article, the improved (G^’/G)-expansion method has been implemented to generate travelling wave solutions, where G(ξ) satisfies the second order linear ordinary differential equation. To show the advantages of the method, the (3+1)-dimensional Kadomstev-Petviashvili (KP) equation has been investigated. Higher-dimensional nonlinear partial differential equations have many potential applications in mathematical physics and engineering sciences. Some of our solutions are in good agreement with already published results for a special case and others are new. The solutions in this work may express a variety of new features of waves. Furthermore, these solutions can be valuable in the theoretical and numerical studies of the considered equation. Also, in order to understand the behaviour of solutions, the graphical representations of some obtained solutions have been presented. http://pubs.sciepub.com/ajams/1/4/3/ajams-1-4-3.pdf the improved (G^’/G)-expansion method the Kadomstev-Petviashvili equation traveling wave solutions nonlinear evolution equations