Interval Oscillation Theorems for Certain Second Order Neutral Differential Equations with Continuous Deviating Arguments

By introducing two generalized integral operators and using a generalized Riccati technique, we obtain new oscillation criteria for certain second order neutral functional differential equations with continuously distributed delay. These results are different from most known ones in the sense that they are based on the information only on a sequence of subintervals of [t(0),infinity), rather than on the whole half-linear.