An Algorithm for the Machine Computation of Partial-Fractions Expansion of Functions Having Multiple Poles
An Algorithm for the Machine Computation of Partial-Fractions Expansion of Functions Having Multiple Poles
复制标题
多极点函数的部分分数展开式的机器计算算法
DOI:
10.1109/t-c.1971.223099
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发表时间:
1971
影响因子:
3.7
通讯作者:
S. Godbole
中科院分区:
文献类型:
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作者:
S. Godbole
The partial-fractions expansion of a function F(s)/(s-a)m, m > 1, involves the computation of m coefficients, namely (1 /i!)(diF(a)/dsi), 0 ≤ i ≤ m-1. Wehrhahn [1] and Karni [3] have provided a method for computing these coefficients algebraically. A new approach is taken here which involves approximating a multiple pole by neighboring simple poles. The theory developed turns out to have a very interesting resemblance to the FFT algorithm. The algorithm is illustrated by several examples. Typical applications are finding the inverse Laplace transform of a function having multiple poles and the evaluation of higher order derivatives of an arbitrary function H(z) at some arbitrary z=z0.
DOI:
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发表时间:
2019
期刊:
影响因子:
--
作者:
宮部さやか;藤井規史;藤本慎司;岡本博之,藤森茜,森川公彦,水野薫
通讯作者:
岡本博之,藤森茜,森川公彦,水野薫