Oscillation of second order nonlinear delay difference equations
Bull. Korean Math. Soc. 2003 Vol. 40, No. 3, 489-501
Published online September 1, 2003
S. H. Saker
Mansoura University
Abstract : In this paper we shall consider the nonlinear delay difference
\Delta (p_{n}\Delta x_{n})+q_{n}f(x_{n-\sigma })=0,\qquad n=0,1,2,\ldots%
when $\sum\limits_{n=n_{0}}^{\infty }\frac{1}{p_{n}}<\infty $. We
will establish some sufficient conditions which guarantee that
every solution is oscillatory or converges to zero.
Keywords : oscillation, nonlinear delay difference equations
MSC numbers : 39A10
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