DLMF:25.14.E6 (Q7745)

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DLMF:25.14.E6
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    Φ ( z , s , a ) = 1 2 a - s + 0 z x ( a + x ) s d x - 2 0 sin ( x ln z - s arctan ( x / a ) ) ( a 2 + x 2 ) s / 2 ( e 2 π x - 1 ) d x , Lerch-Phi 𝑧 𝑠 𝑎 1 2 superscript 𝑎 𝑠 superscript subscript 0 superscript 𝑧 𝑥 superscript 𝑎 𝑥 𝑠 𝑥 2 superscript subscript 0 𝑥 𝑧 𝑠 𝑥 𝑎 superscript superscript 𝑎 2 superscript 𝑥 2 𝑠 2 superscript 𝑒 2 𝜋 𝑥 1 𝑥 {\displaystyle{\displaystyle\Phi\left(z,s,a\right)=\frac{1}{2}a^{-s}+\int_{0}^% {\infty}\frac{z^{x}}{(a+x)^{s}}\mathrm{d}x-2\int_{0}^{\infty}\frac{\sin\left(x% \ln z-s\operatorname{arctan}\left(x/a\right)\right)}{(a^{2}+x^{2})^{s/2}(e^{2% \pi x}-1)}\mathrm{d}x,}}
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    DLMF:25.14.E6
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    s > 0 𝑠 0 {\displaystyle{\displaystyle\Re s>0}}
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    s > 1 𝑠 1 {\displaystyle{\displaystyle\Re s>1}}
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    | z | = 1 , a > 0 formulae-sequence 𝑧 1 𝑎 0 {\displaystyle{\displaystyle|z|=1,\Re a>0}}
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    s > 0 𝑠 0 {\displaystyle{\displaystyle\Re s>0}}
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    | z | < 1 𝑧 1 {\displaystyle{\displaystyle|z|<1}}
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    s > 1 𝑠 1 {\displaystyle{\displaystyle\Re s>1}}
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