DLMF:6.4.E1 (Q2234)

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DLMF:6.4.E1
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    Statements

    Defining formula
    E 1 ⁡ ( z ) = Ein ⁡ ( z ) - Ln ⁡ z - γ ; exponential-integral 𝑧 complementary-exponential-integral 𝑧 multivalued-natural-logarithm 𝑧 {\displaystyle{\displaystyle E_{1}\left(z\right)=\mathrm{Ein}\left(z\right)-% \operatorname{Ln}z-\gamma;}}
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    DLMF id
    DLMF:6.4.E1
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    Symbols used
    Euler’s constant
    Defining formula
    γ {\displaystyle{\displaystyle\gamma}}
    xml-id
    C5.S2.E3.m2adec
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    complementary exponential integral
    Defining formula
    Ein ⁡ ( z ) complementary-exponential-integral 𝑧 {\displaystyle{\displaystyle\mathrm{Ein}\left(\NVar{z}\right)}}
    xml-id
    C6.S2.E3.m2adec
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    exponential integral
    Defining formula
    E 1 ⁡ ( z ) exponential-integral 𝑧 {\displaystyle{\displaystyle E_{1}\left(\NVar{z}\right)}}
    xml-id
    C6.S2.E1.m2adec
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