An important inequality is used to establish some criteria for the oscillation of forced difference equation and it is generalized to higher order.
借助一个重要的不等式研究一类带有强迫项的时滞差分方程的振动性，并推广至高阶的情形。
This paper is concerned with the asymptotic behavior and existence of positive solutions for a class of higher order nonlinear neutral difference equation.
研究了一类高阶非线性中立型差分方程正解的存在性和渐近性。
Then for higher order chaotic discrete-time system, the approach discussed can be degraded to one order difference equation. As a result, chaotic discrete-time system can be easily solved by Matlab.
对于高阶离散混沌系统也可以采用上面的变换将系统降阶，变成一阶差分方程组进行求解，从而离散混沌系统都可以通过简单的编程实现数值仿真。
Then for higher order chaotic discrete-time system, the approach discussed can be degraded to one order difference equation. As a result, chaotic discrete-time system can be easily solved by Matlab.
对于高阶离散混沌系统也可以采用上面的变换将系统降阶，变成一阶差分方程组进行求解，从而离散混沌系统都可以通过简单的编程实现数值仿真。
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