Solutions of nonlinear differential equations by F-expansion method

This thesis is consists of four sections. In the first section, classifying and basic partial differentia equations and obtaining partial differentia equations are told and non-linear equations are given from the first step. At last in this section we focused on non linear formation equations and approaches on physical soliton theory. In the second section, the main point of my thesis, F-expansion method is told and applying Zakharov-Kutnezsov, Bossinesq, (2+1) KdV dimensional equations, Broer-Kaup equations to F-expansion equations is tried to be told. In the third section expanded F-expansion is focused on and applying F-expansion method to some non-linear systems is given. At the last, in the forth section the general revision of my thesis is made.Keywords: Exact solutions, F-expansion method, Differential equations, Partial differential equations.