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  2. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    the lower incomplete gamma function; the third angle in a triangle, opposite the side c; the Euler–Mascheroni constant in mathematics [18] gamma rays and the photon; the heat capacity ratio in thermodynamics; the Lorentz factor in special relativity [19] the flight path angle of an airplane

  3. Beta function - Wikipedia

    en.wikipedia.org/wiki/Beta_function

    In mathematics, the beta function, also called the Euler integral of the first kind, is a special function that is closely related to the gamma function and to binomial coefficients. It is defined by the integral

  4. Gamma function - Wikipedia

    en.wikipedia.org/wiki/Gamma_function

    The gamma function then is defined in the complex plane as the analytic continuation of this integral function: it is a meromorphic function which is holomorphic except at zero and the negative integers, where it has simple poles. The gamma function has no zeros, so the reciprocal gamma function ⁠ 1 / Γ(z) ⁠ is an entire function.

  5. List of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/List_of_trigonometric...

    These identities are useful whenever expressions involving trigonometric functions need to be simplified. An important application is the integration of non-trigonometric functions: a common technique involves first using the substitution rule with a trigonometric function, and then simplifying the resulting integral with a trigonometric identity.

  6. Inverse-gamma distribution - Wikipedia

    en.wikipedia.org/wiki/Inverse-gamma_distribution

    In probability theory and statistics, the inverse gamma distribution is a two-parameter family of continuous probability distributions on the positive real line, which is the distribution of the reciprocal of a variable distributed according to the gamma distribution.

  7. Jacobi polynomials - Wikipedia

    en.wikipedia.org/wiki/Jacobi_polynomials

    Plot of the Jacobi polynomial function (,) with = and = and = in the complex plane from to + with colors created with Mathematica 13.1 function ComplexPlot3D In mathematics , Jacobi polynomials (occasionally called hypergeometric polynomials ) P n ( α , β ) ( x ) {\displaystyle P_{n}^{(\alpha ,\beta )}(x)} are a class of classical orthogonal ...

  8. Direction cosine - Wikipedia

    en.wikipedia.org/wiki/Direction_cosine

    If vectors u and v have direction cosines (α u, β u, γ u) and (α v, β v, γ v) respectively, with an angle θ between them, their units vectors are ^ = + + (+ +) = + + ^ = + + (+ +) = + +. Taking the dot product of these two unit vectors yield, ^ ^ = + + = ⁡, where θ is the angle between the two unit vectors, and is also the angle between u and v.

  9. Mittag-Leffler function - Wikipedia

    en.wikipedia.org/wiki/Mittag-Leffler_function

    In mathematics, the Mittag-Leffler functions are a family of special functions. They are complex-valued functions of a complex argument z , and moreover depend on one or two complex parameters. The one-parameter Mittag-Leffler function , introduced by Gösta Mittag-Leffler in 1903, [ 1 ] [ 2 ] can be defined by the Maclaurin series