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  2. Euler's constant - Wikipedia

    en.wikipedia.org/wiki/Euler's_constant

    The notation γ appears nowhere in the writings of either Euler or Mascheroni, and was chosen at a later time, perhaps because of the constant's connection to the gamma function. [3] For example, the German mathematician Carl Anton Bretschneider used the notation γ in 1835, [ 4 ] and Augustus De Morgan used it in a textbook published in parts ...

  3. Dirichlet hyperbola method - Wikipedia

    en.wikipedia.org/wiki/Dirichlet_hyperbola_method

    The method also has theoretical applications: for example, Peter Gustav Lejeune Dirichlet introduced the technique in 1849 to obtain the estimate [1] [2] = ⁡ + + (), where γ is the EulerMascheroni constant.

  4. Harmonic series (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Harmonic_series_(mathematics)

    The first terms of the series sum to approximately ⁡ +, where is the natural logarithm and is the EulerMascheroni constant. Because the logarithm has arbitrarily large values, the harmonic series does not have a finite limit: it is a divergent series .

  5. Poussin proof - Wikipedia

    en.wikipedia.org/wiki/Poussin_proof

    where d represents the divisor function, and γ represents the Euler-Mascheroni constant. In 1898, Charles Jean de la Vallée-Poussin proved that if a large number n is divided by all the primes up to n, then the average fraction by which the quotient falls short of the next whole number is γ:

  6. Stieltjes constants - Wikipedia

    en.wikipedia.org/wiki/Stieltjes_constants

    The area of the blue region converges on the EulerMascheroni constant, which is the 0th Stieltjes constant. In mathematics , the Stieltjes constants are the numbers γ k {\displaystyle \gamma _{k}} that occur in the Laurent series expansion of the Riemann zeta function :

  7. Harmonic number - Wikipedia

    en.wikipedia.org/wiki/Harmonic_number

    The interpolating function is in fact closely related to the digamma function = (+) +, where ψ(x) is the digamma function, and γ is the EulerMascheroni constant. The integration process may be repeated to obtain H x , 2 = ∑ k = 1 ∞ ( − 1 ) k − 1 k ( x k ) H k . {\displaystyle H_{x,2}=\sum _{k=1}^{\infty }{\frac {(-1)^{k-1}}{k}}{x ...

  8. File:EulerMascheroni.svg - Wikipedia

    en.wikipedia.org/wiki/File:EulerMascheroni.svg

    The area between the two curves (red) tends to a limit, namely the Euler-Mascheroni constant. ... some value. author name string: Tristanevanslee. ... Code of Conduct ...

  9. Digamma function - Wikipedia

    en.wikipedia.org/wiki/Digamma_function

    Euler's product formula for the gamma function, combined with the functional equation and an identity for the EulerMascheroni constant, yields the following expression for the digamma function, valid in the complex plane outside the negative integers (Abramowitz and Stegun 6.3.16): [1]