Singular and non-topological soliton solutions for nonlinear fractional differential equations

In this article, the fractional derivatives are described in the modified Riemann-Liouville sense.We propose a new approach, namely an ansatz method, for solving fractional differential equations (FDEs) based on a fractional complex transform and apply it to solve nonlinear space-time fractional equations.As a result, the non-topological as well as the singular soliton solutions are obtained.This method can be suitable and more powerful for solving other kinds of nonlinear fractional FDEs arising in mathematical physics.