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Oscillation of linear difference equations with deviating arguments. (English) Zbl 1007.39002
The difference equation with deviating arguments $$\Delta^2 u(k)+ \sum^m_{j=1} p_j(k) u(\sigma_j(k))= 0,$$ is considered, where $\Delta u(k)= u(k+1)- u(k)$, $\Delta^2= \Delta\circ \Delta$, $p_j\ge 0$, and $\lim_{k\to\infty} \sigma_j(k)= \infty$, $j= 1,\dots, m$. Sufficient conditions are obtained for all proper solutions of the equation to be oscillatory.

##### MSC:
 39A11 Stability of difference equations (MSC2000) 65Q05 Numerical methods for functional equations (MSC2000)
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##### References:
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