DLMF:5.15.E1 (Q2170)

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DLMF:5.15.E1
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    Statements

    test
    ψ ′ ⁡ ( z ) = ∑ k = 0 ∞ 1 ( k + z ) 2 , diffop digamma 1 𝑧 superscript subscript 𝑘 0 1 superscript 𝑘 𝑧 2 {\displaystyle{\displaystyle\psi'\left(z\right)=\sum_{k=0}^{\infty}\frac{1}{(k% +z)^{2}},}}
    0 references
    DLMF id
    DLMF:5.15.E1
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    constraint
    z ≠ 0 , - 1 , - 2 , … 𝑧 0 1 2 … {\displaystyle{\displaystyle z\neq 0,-1,-2,\dots}}
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    Symbols used
    psi (or digamma) function
    test
    ψ ⁡ ( z ) digamma 𝑧 {\displaystyle{\displaystyle\psi\left(\NVar{z}\right)}}
    xml-id
    C5.S2.E2.m2adec
    0 references
     
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