Author/Authors :
Mohamad, Hussain Ali University of Baghdad - College of Science for Women - Department of Mathematic, Iraq , Mohammed, Sada F. University of Baghdad - College of Science for Women - Dept of Mathematics, Iraq , Hassan, Awatif A. University of Baghdad - College of Science for Women - Dept of Mathematics, Iraq
Abstract :
This paper is concerned with the oscillation of all solutions of the n-th order delay differential equation x(n)(t) + P(t) f (x(z(t))) = 0, n 2 . The necessary and sufficient conditions for oscillatory solutions are obtained and other conditions for nonoscillatory solution to converge to zero are established
