DLMF:8.19.E7 (Q2693)

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Language	Label	Description	Also known as
English	DLMF:8.19.E7	No description defined

Statements

Defining formula

{\displaystyle{\displaystyle E_{n}\left(z\right)=\frac{(-z)^{n-1}}{(n-1)!}E_{1% }\left(z\right)+\frac{e^{-z}}{(n-1)!}\sum_{k=0}^{n-2}(n-k-2)!(-z)^{k},}}

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DLMF:8.19.E7

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{\displaystyle{\displaystyle n=2,3,\dots}}

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base of natural logarithm

Defining formula

{\displaystyle{\displaystyle\mathrm{e}}}

C4.S2.E11.m2addec

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exponential integral

Defining formula

{\displaystyle{\displaystyle E_{1}\left(\NVar{z}\right)}}

C6.S2.E1.m2adec

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generalized exponential integral

Defining formula

{\displaystyle{\displaystyle E_{\NVar{p}}\left(\NVar{z}\right)}}

C8.S19.E1.m2akdec

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Defining formula

{\displaystyle{\displaystyle!}}

introduction.Sx4.p1.t1.r15.m5adec

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Defining formula

{\displaystyle{\displaystyle z}}

C8.S1.XMD2.m1edec

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Sitelinks

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