Author/Authors :
Mohamad, Hussain Ali University of Baghdad - College of Science for Women - Department of Mathematic, Iraq , Qasem, Intisar Haitham University of Baghdad - College of science for women - Dept of Mathematics, Iraq , Abdullah, Zainab Ahmed University of Baghdad - College of science for women - Dept of Mathematics, Iraq
Abstract :
Oscillation criteria are obtained for all solutions of the first-order linear delay differential equations with positive and negative coefficients where we established some sufficient conditions so that every solution of (1.1) oscillate. This paper generalized the results in [11]. Some examples are considered to illustrate our main results.
