Abstract
A necessary and sufficient condition is obtained for oscillation of bounded solutions of second order impulsive delay differential equations of the form
(r(t)x(t))'+p(t)f(x(i(t)))=0,
t not equal theta Delta(r(theta(i))x'(theta(i)))+b(i)g(x(sigma(theta(i))) = 0,
i is an element of Z, Deltax(theta(i)) = 0.
An example is also inserted to illustrate the effect of impulses on the oscillatory behavior of the solutions.