Abstract :
In this paper we consider the second order nonlinear difference equation
D2 yny1qqnf yn.s0 ns1, 2, . . .., 1.
where D ynsynq1yyn is the forward difference operator, fgC R, R., f is
nondecreasing, and uf u.)0 as u/0, qn4 is a real sequence. Some new
sufficient conditions for the oscillation of all solutions of 1. are obtained.
