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。

In the second part, we mainly consider oscillations of solution of some linear and nonlinear partial difference equations with discrete variables and delays.

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证明了一类非线性离散动力系统不动点的两个判别方法，具体分析了两个不同类型的离散动力系统的不动点性质及其分岔特性。

Some nonlinear discrete dynamic systems are considered, and two discriminating methods of the fixed point are proved. The bifurcation behavior of the corresponding dynamic systems is also studied.

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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。

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.

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