Comments on “Soliton solutions to fractional-order nonlinear differential equations based on the exp-function method”

In their recently published article, Guner and Atik apply the exp-function method to derive solitary solutions to fractional-order nonlinear differential equations. We argue that the solutions provided by Guner and Atik do not satisfy the considered equations. Furthermore, we derive correct solitary solutions as well as necessary and sufficient conditions for the existence of these solutions in the space of equation parameters and initial conditions.