本文运用形式幂级数的技巧，证明了一个重要的组合恒等式。
In this paper, an important combinatorial identity is obtained by means of the formal power series.
当指定Z为复数变元时，就有了形式幂级数的“变换”函数，即闭合形式的问题。
When Z is assigned the meaning of a complex variable, problem of "closed form" of formal power series emerges.
该文利用自由幺半群上的有理形式幂级数理论，构造出该概率分布的约化线性表示，从而完全解决了噪声变量的概率分布计算问题。
In this paper, we propose a reduced linear representation of such distribution based on the formal power series on free monoid which can be easily used to calculate the probability distribution.
采用复变函数及摄动方法，最后以幂级数形式给出应力强度因子的计算公式。
Stress intensity factors at the craek tips are computed by complex variable functions and perturbation method and formulas are given in power series forms.
给出了水平一的李型幂级数和水平二的A型幂级数的乘积形式。
The product forms of level one power series of Lie type and level two power series of A type.
采用全量理论和幂级数形式的应力一应变曲线，导出了弹塑性强化材料旋转园盘的渐近解。
Based on the stress - strain curve uith Power series, the asymptotic nalytical solution of rotating disks uith strain-hardening is obtained from the total strain theory.
结果在拉格朗日的视野中，微积分是关于函数的一种代数形式演算，而函数是由一个解析表达式给出并且均可展成幂级数。
Results in perspective of Lagrange, the calculus was a kind of algebraic calculation of the function given by an analytical expression, which could be developed into power series.
结果在拉格朗日的视野中，微积分是关于函数的一种代数形式演算，而函数是由一个解析表达式给出并且均可展成幂级数。
Results in perspective of Lagrange, the calculus was a kind of algebraic calculation of the function given by an analytical expression, which could be developed into power series.
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