DYNAMIC SYSTEMS AND APPLICATIONS, cilt.18, sa.3-4, ss.363-374, 2009 (SCI-Expanded)
In this article, we investigate oscillatory nature of all solutions of a class of delay dynamic equations including positive and negative coefficients. Also we give a nonoscillation criterion for this class of delay dynamic equations. While our results reduce to the well-known oscillation criteria for the particular cases of the time scale, they improve recent results on arbitrary time scales. Further, we give some illustrating examples as applications of our results.