Oscillation Theorems for Certain Second Order Nonlinear Difference Equations

In this paper discrete inequalities are used to offer sufficient conditions for the oscillation of all solutions of the difference equation s D a D y..qq f y .sr , nG0 n n nq1 nq1 n where 0-s sprq with p, q odd integers, or p even and q odd integers. Several examples which dwell upon the importance of our results are also included.