Oscillation Of A Second Order Delay Differential Equations

In this paper, we study the oscillatory behavior of the solutions of the delay differential equation of the form ` 1 r(t) y 0 (t) ' 0 + p(t)y(ø(t)) = 0: The obtained results are applied to n-th order delay differential equation with quasiderivatives of the form Lnu(t) + p(t)u(ø(t)) = 0