Analysis of solutions of some partial differential equation with the method of bernoulli sub-equation function

This study consists of the four chapters. In the first chapter, it has been given information on some fundamental definitions and theorems which have been used in following chapters. In chapter two, it has been given information on general structure of Bernoulli Sub-Equation Function. In chapter three, Vakhnenko-Parkes ve PHI-four equations have been solved with Bernoulli Sub-Equation Method. 2D and 3D graphics of the solutions have been drawn used Mathematica 9 program. In chapter four, it has been given a comprehensive conclusion by taking into account analytical solutions obtained in this study.