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DLMF:5.4.E15

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Formula:2587
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MaRDI QIDQ2587

  • Label: DLMF:5.4.E15


Digital Library of Mathematical Functions ID 5.4.E15

ψ ⁡ ( n + 1 2 ) = - γ - 2 ⁢ ln ⁡ 2 + 2 ⁢ ( 1 + 1 3 + … + 1 2 ⁢ n - 1 ) , digamma 𝑛 1 2 2 2 2 1 1 3 … 1 2 𝑛 1 {\displaystyle{\displaystyle\psi\left(n+\tfrac{1}{2}\right)=-\gamma-2\ln 2+2% \left(1+\tfrac{1}{3}+\dots+\tfrac{1}{2n-1}\right),}}


Constraint(s)

n = 1 , 2 , … 𝑛 1 2 … {\displaystyle{\displaystyle n=1,2,\dots}}

Symbols List

  • γ {\displaystyle{\displaystyle\gamma}} : Euler’s constant
  • ψ ⁡ ( z ) digamma 𝑧 {\displaystyle{\displaystyle\psi\left(\NVar{z}\right)}} : psi (or digamma) function
  • ln ⁡ z 𝑧 {\displaystyle{\displaystyle\ln\NVar{z}}} : principal branch of logarithm function
  • n 𝑛 {\displaystyle{\displaystyle n}} : nonnegative integer
  •  Edit this on Wikidata

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