This is a preview. Log in through your library . Abstract We prove the existence and uniqueness of solutions of a class of second order differential equations with piecewise constant mixed arguments ...

Let Φ(z) = ∑∞ 0 βjz j have radius of convergence $r (0 < r < \infty)$ and no singularities other than poles on the circle |z| = r. A complete solution is ...