DLMF:8.19.E11 (Q2697)

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DLMF:8.19.E11
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    E p ( z ) = Γ ( 1 - p ) ( z p - 1 - e - z k = 0 z k Γ ( 2 - p + k ) ) , exponential-integral-En 𝑝 𝑧 Euler-Gamma 1 𝑝 superscript 𝑧 𝑝 1 superscript 𝑒 𝑧 superscript subscript 𝑘 0 superscript 𝑧 𝑘 Euler-Gamma 2 𝑝 𝑘 {\displaystyle{\displaystyle E_{p}\left(z\right)=\Gamma\left(1-p\right)\left(z% ^{p-1}-e^{-z}\sum_{k=0}^{\infty}\frac{z^{k}}{\Gamma\left(2-p+k\right)}\right),}}
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