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  2. Frobenius solution to the hypergeometric equation - Wikipedia

    en.wikipedia.org/wiki/Frobenius_solution_to_the...

    In the following we solve the second-order differential equation called the hypergeometric differential equation using Frobenius method, named after Ferdinand Georg Frobenius. This is a method that uses the series solution for a differential equation, where we assume the solution takes the form of a series. This is usually the method we use for ...

  3. Orbital period - Wikipedia

    en.wikipedia.org/wiki/Orbital_period

    The orbital period (also revolution period) is the amount of time a given astronomical object takes to complete one orbit around another object. In astronomy, it usually applies to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars.

  4. Cabibbo–Kobayashi–Maskawa matrix - Wikipedia

    en.wikipedia.org/wiki/Cabibbo–Kobayashi...

    A "standard" parameterization of the CKM matrix uses three Euler angles ( θ 12, θ 23, θ 13 ) and one CP-violating phase ( δ 13 ). [8] θ 12 is the Cabibbo angle. Couplings between quark generations j and k vanish if θ jk = 0 . Cosines and sines of the angles are denoted c jk and s jk, respectively.

  5. Decimal degrees - Wikipedia

    en.wikipedia.org/wiki/Decimal_degrees

    A DMS value is converted to decimal degrees using the formula: = + + For instance, the decimal degree representation for 38° 53′ 23″ N, 77° 00′ 32″ W (the location of the United States Capitol) is 38.8897°, -77.0089°

  6. Young–Laplace equation - Wikipedia

    en.wikipedia.org/wiki/Young–Laplace_equation

    In physics, the Young–Laplace equation (/ l ə ˈ p l ɑː s /) is an algebraic equation that describes the capillary pressure difference sustained across the interface between two static fluids, such as water and air, due to the phenomenon of surface tension or wall tension, although use of the latter is only applicable if assuming that the wall is very thin.

  7. Truncated normal distribution - Wikipedia

    en.wikipedia.org/wiki/Truncated_normal_distribution

    Truncated normals with fixed support form an exponential family. Nielsen [3] reported closed-form formula for calculating the Kullback-Leibler divergence and the Bhattacharyya distance between two truncated normal distributions with the support of the first distribution nested into the support of the second distribution.

  8. Euler–Rodrigues formula - Wikipedia

    en.wikipedia.org/wiki/Euler–Rodrigues_formula

    Rotation is given by ′ (′ + ′ + ′) = † = (+ +) (+ + +), which it can be confirmed by multiplying out gives the Euler–Rodrigues formula as stated above. Thus, the Euler parameters are the real and imaginary coordinates in an SU(2) matrix corresponding to an element of the spin group Spin(3), which maps by a double cover mapping to a ...

  9. Nitrogen difluoride - Wikipedia

    en.wikipedia.org/wiki/Nitrogen_difluoride

    At room temperature N 2 F 4 is mostly associated with only 0.7% in the form of NF 2 at 5 mmHg (670 Pa) pressure. When the temperature rises to 225 °C, it mostly dissociates with 99% in the form of NF 2. [5] In NF 2, the N–F bond length is 1.3494 Å and the angle subtended at F–N–F is 103.33°. [7]