Nonexistence of positive solutions of a class of nonlinear delay partial difference equations (Q1301865)

The authors establish sufficient conditions for the nonexistence of positive solutions for a class of nonlinear delay partial difference equations. For related results see the papers of \textit{P. J. Y. Wong} and \textit{R. P. Agarwal} [J. Math. Anal. Appl. 214, No. 2, 503-523 (1997; Zbl 0895.39005); Comput. Math. Appl. 32, No. 6, 57-86 (1996; Zbl 0863.35111)] and \textit{B. G. Zhang} and \textit{S. T. Liu} [J. Math. Anal. Appl. 206, No. 2, 480-492 (1997; Zbl 0877.39012); Panam. Math. J. 5, No. 2, 61-70 (1995; Zbl 0840.39004)].