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  2. Wallis product - Wikipedia

    en.wikipedia.org/wiki/Wallis_product

    Wallis derived this infinite product using interpolation, though his method is not regarded as rigorous. A modern derivation can be found by examining ∫ 0 π sin n ⁡ x d x {\displaystyle \int _{0}^{\pi }\sin ^{n}x\,dx} for even and odd values of n {\displaystyle n} , and noting that for large n {\displaystyle n} , increasing n ...

  3. Wallis' integrals - Wikipedia

    en.wikipedia.org/wiki/Wallis'_integrals

    The sequence () is decreasing and has positive terms. In fact, for all : >, because it is an integral of a non-negative continuous function which is not identically zero; + = ⁡ + ⁡ = (⁡) (⁡) >, again because the last integral is of a non-negative continuous function.

  4. Stirling's approximation - Wikipedia

    en.wikipedia.org/wiki/Stirling's_approximation

    This is an example of an asymptotic expansion. It is not a convergent series ; for any particular value of n {\displaystyle n} there are only so many terms of the series that improve accuracy, after which accuracy worsens.

  5. John Wallis - Wikipedia

    en.wikipedia.org/wiki/John_Wallis

    Wallis' development of a model of English grammar, independent of earlier models based on Latin grammar, is a case in point of the way other sciences helped develop cryptology in his view. [37] Wallis tried to teach his own son John, and his grandson by his daughter Anne, William Blencowe the tricks of the trade.

  6. Kruskal–Wallis test - Wikipedia

    en.wikipedia.org/wiki/Kruskal–Wallis_test

    The parametric equivalent of the Kruskal–Wallis test is the one-way analysis of variance (ANOVA). A significant Kruskal–Wallis test indicates that at least one sample stochastically dominates one other sample. The test does not identify where this stochastic dominance occurs or for how many pairs of groups stochastic dominance obtains.

  7. Pell's equation - Wikipedia

    en.wikipedia.org/wiki/Pell's_equation

    For example, the smallest solution to = is (32 188 120 829 134 849, 1 819 380 158 564 160), and this is the equation which Frenicle challenged Wallis to solve. [20] Values of n such that the smallest solution of x 2 − n y 2 = 1 {\displaystyle x^{2}-ny^{2}=1} is greater than the smallest solution for any smaller value of n are

  8. Calculus - Wikipedia

    en.wikipedia.org/wiki/Calculus

    Calculus is also used to find approximate solutions to equations; in practice, it is the standard way to solve differential equations and do root finding in most applications. Examples are methods such as Newton's method, fixed point iteration, and linear approximation.

  9. List of formulae involving π - Wikipedia

    en.wikipedia.org/wiki/List_of_formulae_involving_π

    Einstein's field equation of general ... (another form of Wallis product) Viète's formula: = ... inversions are the following two examples, ...