COMPARISON RZSULT AND FORCED OSCILLATION FOR DIFFERENCE EQUATIONS WITH CONTINUOUS ARCUMENTS
具连续变量差分方程的比较定理及强迫振动

in this paper the necessary and sufficient condition for the existence of positivesolutions of linear difference equations with continuous arguments and constant coefficients isestablished. As an application, some sufficient conditions for oscillation of linear differenceequations with variable coefficients and forced term are obtained.