Equivalence of The (G `/G)-expansion Method and The Tanh-Coth Function Method

Wazwaz {[}Appl. Math. Comput 195, 24-33 (2008)] has used the tanh-coth function method to find the solutions of the Pochhammer-Chree equation (1). In this article, we have applied the (G'/G)-expansion method to solve the same equation. We have noted that both of these methods give the same solutions. Furthermore, we have shown in theorem 1, that the (G'/G)-expansion method is equivalent to the tanh-coth function method