Oscillations of solutions of second order functional delay differential equations

This thesis consists of three chapters. The thesis is devoted to a generaldiscussion of second order half linear functional differential equations.The first chapter is deveted to a general discussion of functional differentialequations. In this context, the classification of these types of equation, existenceand uniqueness theorems for initial-valuve problems, and oscillation definitionshave been investigated. The second chapter, criteria with second orderfunctional type equations of the form.are examined.The third chapters provides type equations of the form which defined Tiryaki[13]. Criteria to the oscillation.