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貝利定理


伽瑪(z)伽瑪函式n!! 表示 雙階乘,則

 [(Gamma(m+1/2))/(Gamma(m))]^2[1/m+(1/2)^21/(m+1)+((1·3)/(2·4))^21/(m+2)+...]_()_(n) 
=[(Gamma(n+1/2))/(Gamma(n))]^2[1/n+(1/2)^21/(n+1)+((1·3)/(2·4))^21/(n+2)+...]_()_(m).

顯式地寫出和式,貝利定理指出

 [(Gamma(m+1/2))/(Gamma(m))]^2sum_(k=0)^(n-1)1/(m+k)[((2k-1)!!)/((2k)!!)]^2 
 =[(Gamma(n+1/2))/(Gamma(n))]^2sum_(k=0)^(m-1)1/(n+k)[((2k-1)!!)/((2k)!!)]^2.

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伽瑪函式

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參考文獻

Bailey, W. N. "The Partial Sum of the Coefficients of the Hypergeometric Series." J. London Math. Soc. 6, 40-41, 1931.Bailey, W. N. "On One of Ramanujan's Theorems." J. London Math. Soc. 7, 34-36, 1932.Darling, H. B. C. "On a Proof of One of Ramanujan's Theorems." J. London Math. Soc. 5, 8-9, 1930.Hardy, G. H. Ramanujan: Twelve Lectures on Subjects Suggested by His Life and Work, 3rd ed. New York: Chelsea, pp. 106-107 and 112, 1999.Hodgkinson, J. "Note on One of Ramanujan's Theorems." J. London Math. Soc. 6, 42-43, 1931.Watson, G. N. "Theorems Stated by Ramanujan (VIII): Theorems on Divergent Series." J. London Math. Soc. 4, 82-86, 1929.Watson, G. N. "The Constants of Landau and Lebesgue." Quart. J. Math. (Oxford) 1, 310-318, 1930.Whipple, F. J. W. "The Sum of the Coefficients of a Hypergeometric Series." J. London Math. Soc. 5, 192, 1930.

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貝利定理

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Weisstein, Eric W. “貝利定理。” 來自 Web 資源。 https://mathworld.tw/BaileysTheorem.html

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