University of TabrizComputational Methods for Differential Equations2345-398212220240301Modified simple equation method (MSEM) for solving nonlinear (3+1)-dimensional space-time fractional equations4134241688610.22034/cmde.2023.51930.2168ENMohammad SaeedBarikbinDepartment of Mathematics, Takestan branch, Islamic Azad University, Takestan, IranJournal Article20220604In the present paper, modified simple equation method (MSEM) is implemented for obtaining exact solutions of three nonlinear (3 + 1)-dimensional space-time fractional equation, namely three types of modified Korteweg-de-Vries (mKdV) equations. Here, the derivatives are of the type of conformable fractional derivatives. The solving process produces a system of algebraic equations which is possible to be easily with no need of using software for determining unknown coefficients. Results show that this method can supply a powerful mathematical tool to construct exact solutions of mKdV equations and it can be employed for other nonlinear (3 + 1) - dimensional space-time fractional equations.https://cmde.tabrizu.ac.ir/article_16886_3907b478dcc84572a45d47e1c0bb930d.pdf