Kamenev-type and interval oscillation criteria for second-order linear differential equations on a measure chain

We establish Kamenev-type criteria and interval criteria for oscillation of the second-order scalar differential equation (p(t)xΔ(t ))Δ+q(t)x(σ(t)) = 0 on a measure chain. Our results cover those for differential equations and provide new oscillation criteria for difference equations. Several examples are given to show the significance of the results.  2004 Elsevier Inc. All rights reserved