研究了三阶Poincaré差分方程解的渐近性质。这种差分方程对应的常系数线性差分方程的特征方程有重根。

We studied the asymptotic behavior of solutions to third order Poincaré difference equation whose characteristic equation has multiple roots.

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给出了求常系数线性齐次差分方程组通解的一种方法，用一个例子说明所给方法。

This paper gives a method to obtain solution of linear homogeneous difference systems with constant coefficients. The method of this paper is illustrated by a example.

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