(in lingua inglese)
In this paper, the improved fractional Riccati expansion method is presented to find the analytical solutions of nonlinear space time FDEs. The obtained solutions are expressed through Mittag–Leffler type functions. Four examples are studied to illustrate the efficiency of the method. With the best of our knowledge, some of the obtained results are appear for the first time. The improved fractional Riccati expansion method can be applied to other FDEs.