Oscillation Criteria for Second Order Impulsive Delay Differential Equation.

A necessary and sufficient condition is obtained for oscillation of bounded solutions of second order impulsive delay differential equations of the form <DFORMULA>(r(t)x′(t))′ + p(t)f(x(τ(t))) = 0, t ≠ θi, Δ(r(θi)x′(θi)) + big(x(σ(θi))) = 0, i ∈ Z, Δx(θi) = 0</DFORMULA>. An example is also inserted to illustrate the effect of impulses on the oscillatory behavior of the solutions. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]