Asymptotic Properties of N-th Order Differential Equations with Delayed Argument

The aim of this paper is to deduce oscillatory and asymptotic behaviour of delay differential equation L_nu(t)– P(t)u(τ(t))= 0 from the oscillation of a set of the first order delay differential equations with larger deviating argument of the form y′(t)+ q_i(t) y(w(t)) = 0.