Frequent Oscillatory Behavior of Delay Partial Difference Equations with Positive and Negative Coefficients
نویسندگان
چکیده
Partial difference equations are difference equations that involve functions with two or more independent integer variables. Such equations arise from considerations of random walk problems, molecular structure problems, and numerical difference approximation problems. Recently, there have been a large number of papers devoted to partial difference equations, and the problem of oscillatory of solutions and frequent oscillatory solutions for partial difference equations is receiving much attention. In 1 , authors considered oscillatory behavior of the partial difference equations with positive and negative coefficients of the form
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