Existence of positive solutions of delay partial difference equations are studied. The positive solutions of the equations are given by using method of direct structure in the Banach space.
对时滞偏差分方程正解的存在性进行研究。
参考来源 - 偏差分方程正解的存在性和比较定理 Existence and Comparison Theorems of Positive Solution for Partial Difference Equations·2,447,543篇论文数据，部分数据来源于NoteExpress
In the second part, we mainly consider oscillations of solution of some linear and nonlinear partial difference equations with discrete variables and delays.
第二章主要是研究某些类型的线性或非线性的带有离散时滞的偏差分方程解的振动性的判别法。
By means of the comparison theorem, and the oscillation of some non-linear partial difference equations is discussed and some concise conditions and authenticity are given.
给出系统振动的比较定理，利用比较定理讨论了一类非线性偏差分方程的振动性，给出简单的判别条件及证明。
This paper is concerned with oscillation of solutions of a class of nonlinear partial difference equations. Some sufficient conditions of oscillation for the equations have been obtained.
本文讨论了一类半线性偏差分方程解的振动性，得到了这类方程解的振动性的一些充分条件。
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