CARPATHIAN JOURNAL OF MATHEMATICS, cilt.27, sa.1, ss.1-12, 2011 (SCI-Expanded)
We prove the existence and uniqueness of solutions of a class of second order differential equations with piecewise constant mixed arguments and we show that the zero solution of Eq. (1.1) is a global attractor. Also, we study some properties of solutions of Eq. (1.1) such as oscillation, nonoscillation, and periodicity