DLMF:13.2.E18 (Q4308)

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DLMF:13.2.E18
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    Statements

    Defining formula
    U ⁡ ( a , b , z ) = Γ ⁡ ( b - 1 ) Γ ⁡ ( a ) ⁢ z 1 - b + Γ ⁡ ( 1 - b ) Γ ⁡ ( a - b + 1 ) + O ⁡ ( z 2 - ℜ ⁡ b ) , Kummer-confluent-hypergeometric-U 𝑎 𝑏 𝑧 Euler-Gamma 𝑏 1 Euler-Gamma 𝑎 superscript 𝑧 1 𝑏 Euler-Gamma 1 𝑏 Euler-Gamma 𝑎 𝑏 1 Big-O superscript 𝑧 2 𝑏 {\displaystyle{\displaystyle U\left(a,b,z\right)=\frac{\Gamma\left(b-1\right)}% {\Gamma\left(a\right)}z^{1-b}+\frac{\Gamma\left(1-b\right)}{\Gamma\left(a-b+1% \right)}+O\left(z^{2-\Re b}\right),}}
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    DLMF id
    DLMF:13.2.E18
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