Oscillation Of Certain Two-dimensional Nonlinear Difference System And Certain N Order Impulsive Differential Equation

This dissertation is devoted to studying of oscillation of certain two-dimensional nonlinear difference system and oscillation of certain n order differential equation. It mainly consists of two chapters.The second Chapter is concerned with oscillation of certain two-dimensional nonlinear difference systemWe established necessary and sufficient conditions for oscillation of its solutions.Chapter3 deals with oscillation of certain n order differential equationOur aim in this part is to obtain necessary and sufficient conditions for oscillation of its solutions.