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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. 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 ...

  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. Gumbel distribution - Wikipedia

    en.wikipedia.org/wiki/Gumbel_distribution

    The standard Gumbel distribution is the case where = and = with cumulative distribution function = ()and probability density function = (+).In this case the mode is 0, the median is ⁡ (⁡ ()), the mean is (the EulerMascheroni constant), and the standard deviation is /

  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. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]

  8. Poussin proof - Wikipedia

    en.wikipedia.org/wiki/Poussin_proof

    In number theory, a branch of mathematics, the Poussin proof is the proof of an identity related to the fractional part of a ratio.. In 1838, Peter Gustav Lejeune Dirichlet proved an approximate formula for the average number of divisors of all the numbers from 1 to n:

  9. Barnes G-function - Wikipedia

    en.wikipedia.org/wiki/Barnes_G-function

    It is related to the gamma function, the K-function and the Glaisher–Kinkelin constant, and was named after mathematician Ernest William Barnes. [1] It can be written in terms of the double gamma function. Formally, the Barnes G-function is defined in the following Weierstrass product form: