DLMF:6.8.E1 (Q2270)

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Language	Label	Description	Also known as
English	DLMF:6.8.E1	No description defined

Statements

Defining formula

{\displaystyle{\displaystyle\frac{1}{2}\ln\left(1+\frac{2}{x}\right)<e^{x}E_{1% }\left(x\right)<\ln\left(1+\frac{1}{x}\right),}}

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DLMF:6.8.E1

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base of natural logarithm

Defining formula

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

C4.S2.E11.m2adec

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exponential integral

Defining formula

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

C6.S2.E1.m2adec

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principal branch of logarithm function

Defining formula

{\displaystyle{\displaystyle\ln\NVar{z}}}

C4.S2.E2.m2adec

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Defining formula

{\displaystyle{\displaystyle x}}

C6.S1.XMD1.m1dec

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Sitelinks

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