“…Exact solutions to nonlinear partial differential equations play an important role in nonlinear physical science since they can provide much physical information and more insight into the physical aspects of the problem and thus lead to further applications. In recent years, many methods for obtaining explicit traveling and solitary wave solutions of NLEEs have been proposed such as inverse scattering transform method [2], Darboux transformation method [3,4], Hirota's bilinear method [5], Bäcklund transformation method [6], homogeneous balance method [7], solitary wave ansatz method [8,9], Jacobi elliptic function expansion method [10], the tanh function method [11], ð G 0 G Þ expansion method [12,13], F-expansion method [14], projective Ricatti equation method [15,16,17] and so on. Among them extended F-expansion and projective Ricatti equation methods have been proved to be a powerful mathematical tool to investigate the exact solutions for NLEEs.…”