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  2. Terror on the Prairie - Wikipedia

    en.wikipedia.org/wiki/Terror_on_the_Prairie

    In the 1870s, several years after the end of the Civil War, veteran Jeb McAllister and his wife Hattie struggle to raise their adolescent son Will and infant daughter in the wilds of Montana. [6]

  3. Central binomial coefficient - Wikipedia

    en.wikipedia.org/wiki/Central_binomial_coefficient

    The central binomial coefficients give the number of possible number of assignments of n -a-side sports teams from 2 n players, taking into account the playing area side. The central binomial coefficient is the number of arrangements where there are an equal number of two types of objects. For example, when , the binomial coefficient is equal ...

  4. Particular values of the Riemann zeta function - Wikipedia

    en.wikipedia.org/wiki/Particular_values_of_the...

    It is known that ζ(3) is irrational (Apéry's theorem) and that infinitely many of the numbers ζ(2n + 1) : n ∈ , are irrational. [1] There are also results on the irrationality of values of the Riemann zeta function at the elements of certain subsets of the positive odd integers; for example, at least one of ζ (5), ζ (7), ζ (9), or ζ ...

  5. Harmonic series (mathematics) - Wikipedia

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

    [3] The divergence of the harmonic series was first proven in 1350 by Nicole Oresme. [2] [4] Oresme's work, and the contemporaneous work of Richard Swineshead on a different series, marked the first appearance of infinite series other than the geometric series in mathematics. [5] However, this achievement fell into obscurity. [6]

  6. Basel problem - Wikipedia

    en.wikipedia.org/wiki/Basel_problem

    The Basel problem is a problem in mathematical analysis with relevance to number theory, concerning an infinite sum of inverse squares. It was first posed by Pietro Mengoli in 1650 and solved by Leonhard Euler in 1734, [ 1] and read on 5 December 1735 in The Saint Petersburg Academy of Sciences. [ 2] Since the problem had withstood the attacks ...

  7. Catalan number - Wikipedia

    en.wikipedia.org/wiki/Catalan_number

    Generalizations. The Catalan numbers can be interpreted as a special case of the Bertrand's ballot theorem. Specifically, is the number of ways for a candidate A with n + 1 votes to lead candidate B with n votes. The two-parameter sequence of non-negative integers is a generalization of the Catalan numbers.

  8. 1,3,5-Triazido-2,4,6-trinitrobenzene - Wikipedia

    en.wikipedia.org/wiki/1,3,5-Triazido-2,4,6-tri...

    Infobox references. 1,3,5-Triazido-2,4,6-trinitrobenzene, also known as TATNB (triazidotrinitrobenzene) and TNTAZB (trinitrotriazidobenzene), is an aromatic high explosive composed of a benzene ring with three azido groups (-N 3) and three nitro groups (-NO 2) alternating around the ring, giving the chemical formula C 6 (N 3) 3 (NO 2) 3.

  9. Particular values of the gamma function - Wikipedia

    en.wikipedia.org/wiki/Particular_values_of_the...

    Borwein and Zucker [2] have found that () can be expressed algebraically in terms of π, K(k(1)), K(k(2)), K(k(3)), and K(k(6)) where K(k(N)) is a complete elliptic integral of the first kind. This permits efficiently approximating the gamma function of rational arguments to high precision using quadratically convergent arithmetic–geometric ...