Formula:DLMF:25.11:E25

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\HurwitzZeta @ s a = 1 Γ ( s ) 0 x s - 1 e - a x 1 - e - x d x \HurwitzZeta @ 𝑠 𝑎 1 Euler-Gamma 𝑠 superscript subscript 0 superscript 𝑥 𝑠 1 𝑎 𝑥 1 𝑥 𝑥 {\displaystyle{\displaystyle{\displaystyle\HurwitzZeta@{s}{a}=\frac{1}{\Gamma% \left(s\right)}\int_{0}^{\infty}\frac{x^{s-1}{\mathrm{e}^{-ax}}}{1-{\mathrm{e}% ^{-x}}}\mathrm{d}x}}}

Constraint(s)

s > 1 𝑠 1 {\displaystyle{\displaystyle{\displaystyle\Re{s}>1}}} &
a > 0 𝑎 0 {\displaystyle{\displaystyle{\displaystyle\Re{a}>0}}}


Proof

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Symbols List

& : logical and
ζ 𝜁 {\displaystyle{\displaystyle{\displaystyle\zeta}}}  : Hurwitz zeta function : http://dlmf.nist.gov/25.11#E1
Γ Γ {\displaystyle{\displaystyle{\displaystyle\Gamma}}}  : Euler's gamma function : http://dlmf.nist.gov/5.2#E1
{\displaystyle{\displaystyle{\displaystyle\int}}}  : integral : http://dlmf.nist.gov/1.4#iv
e e {\displaystyle{\displaystyle{\displaystyle\mathrm{e}}}}  : the base of the natural logarithm : http://dlmf.nist.gov/4.2.E11
d n x superscript d 𝑛 𝑥 {\displaystyle{\displaystyle{\displaystyle\mathrm{d}^{n}x}}}  : differential : http://dlmf.nist.gov/1.4#iv
z 𝑧 {\displaystyle{\displaystyle{\displaystyle\Re{z}}}}  : real part : http://dlmf.nist.gov/1.9#E2

Bibliography

Equation (25), Section 25.11 of DLMF.

URL links

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