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Balanced polygamma function : ウィキペディア英語版 | Balanced polygamma function In mathematics, the generalized polygamma function or balanced negapolygamma function is a function introduced by Olivier Espinosa Aldunate and Victor H. Moll.〔(Olivier Espinosa Victor H. Moll. A Generalized polygamma function. Integral Transforms and Special Functions Vol. 15, No. 2, April 2004, pp. 101–115 )〕 It generalizes the polygamma function to negative and fractional order, but remains equal to it for integer positive orders. ==Definition==
The generalized polygamma function is defined as follows: : or alternatively, : where is the Polygamma function and is the Hurwitz zeta function. The function is balanced, in that it satisfies the conditions and .
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