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  2. Gyromagnetic ratio - Wikipedia

    en.wikipedia.org/wiki/Gyromagnetic_ratio

    Here the small corrections to the relativistic result g = 2 come from the quantum field theory calculations of the anomalous magnetic dipole moment. The electron g -factor is known to twelve decimal places by measuring the electron magnetic moment in a one-electron cyclotron: [ 3 ] g e = − 2.002 319 304 361 18 ( 27 ) . {\displaystyle g_{\text ...

  3. Angular momentum diagrams (quantum mechanics) - Wikipedia

    en.wikipedia.org/wiki/Angular_momentum_diagrams...

    As a diagram this is a singleheaded arrow. Symmetrically, the corresponding bra is j, m|. In diagram form this is a doubleheaded arrow, pointing in the opposite direction to the ket. In each case; the quantum numbers j, m are often labelled next to the arrows to refer to a specific angular momentum state,

  4. EXPRESS (data modeling language) - Wikipedia

    en.wikipedia.org/wiki/EXPRESS_(data_modeling...

    In most cases the expression refers to other attributes of THIS instance. The expression may also use EXPRESS functions. Inverse attributes do not add "information" to an entity, but only name and constrain an explicit attribute to an entity from the other end. Specific attribute symbols of the EXPRESS-G notation: [2]

  5. Mathieu function - Wikipedia

    en.wikipedia.org/wiki/Mathieu_function

    Mathieu functions arise when separation of variables in elliptic coordinates is applied to 1) the Laplace equation in 3 dimensions, and 2) the Helmholtz equation in either 2 or 3 dimensions. Since the Helmholtz equation is a prototypical equation for modeling the spatial variation of classical waves, Mathieu functions can be used to describe a ...

  6. Mathematics of three-phase electric power - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_three-phase...

    Notice also that using the root mean square voltage =, the expression for above takes the following more classic form: P T O T = 3 V 2 R {\displaystyle P_{TOT}={\frac {3V^{2}}{R}}} . The load need not be resistive for achieving a constant instantaneous power since, as long as it is balanced or the same for all phases, it may be written as

  7. Clebsch–Gordan coefficients - Wikipedia

    en.wikipedia.org/wiki/Clebsch–Gordan_coefficients

    These rules may be iterated to, e.g., combine n doublets (s =1/2) to obtain the Clebsch-Gordan decomposition series, (Catalan's triangle), = = ⌊ / ⌋ (+ + (+)) (+) , where ⌊ / ⌋ is the integer floor function; and the number preceding the boldface irreducible representation dimensionality (2j+1) label indicates multiplicity of that ...

  8. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  9. List of formulae involving π - Wikipedia

    en.wikipedia.org/wiki/List_of_formulae_involving_π

    is the number of collisions made (in ideal conditions, perfectly elastic with no friction) by an object of mass m initially at rest between a fixed wall and another object of mass b 2N m, when struck by the other object. [1] (This gives the digits of π in base b up to N digits past the radix point.)