Periodic Solutions Of Neutral Functional Differential Equations

This thesis is concerned with periodic solutions of neutral functional differential equations. The thesis contains three chapters.Chapter 1 introduces research backgrounds of periodic solutions of neutral functional differential equations, and the main results of the thesis.In Chapter 2, we discuss the following nonlinear ~neutral functional differential equations:By using the coincidence degree theory, we obtain the existence of periodic solutions:The final chapter considers periodic solution of functional differential equations with distributed delay:Some sufficient conditions are obtained by using the fixed point theorem.