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  2. Five-point stencil - Wikipedia

    en.wikipedia.org/wiki/Five-point_stencil

    An illustration of the five-point stencil in one and two dimensions (top, and bottom, respectively). In numerical analysis, given a square grid in one or two dimensions, the five-point stencil of a point in the grid is a stencil made up of the point itself together with its four "neighbors".

  3. 6-5=2 - Wikipedia

    en.wikipedia.org/wiki/6-5=2

    6-5=2 is a 2013 Kannada found footage horror film, written and directed by K S Ashoka in his directoral debut. It is the first found footage film in Kannada. [2] The plot revolves around a fatal trek accident. [3] The film was reported to have taken its inspiration from the 1999 American independent film The Blair Witch Project. [3]

  4. Simplification - Wikipedia

    en.wikipedia.org/wiki/Simplification

    Simplification is the process of replacing a mathematical expression by an equivalent one that is simpler (usually shorter), according to a well-founded ordering. Examples include:

  5. Numerical differentiation - Wikipedia

    en.wikipedia.org/wiki/Numerical_differentiation

    In fact, all the finite-difference formulae are ill-conditioned [4] and due to cancellation will produce a value of zero if h is small enough. [5] If too large, the calculation of the slope of the secant line will be more accurately calculated, but the estimate of the slope of the tangent by using the secant could be worse. [6]

  6. 4F - Wikipedia

    en.wikipedia.org/wiki/4F

    4F correlator, in Fourier optics; The 4f electron shell; Section 4(f) of the United States DOT act of 1966, which regulates acquiring park and historic properties for transportation use. 4F case, a 4 February 2006 controversial criminal case in Barcelona; Flottille 4F a French naval aviation squadron; LMS Fowler Class 4F, a class of 0-6-0 steam ...

  7. Rijndael S-box - Wikipedia

    en.wikipedia.org/wiki/Rijndael_S-box

    Both the input and output are interpreted as polynomials over GF(2). First, the input is mapped to its multiplicative inverse in GF(2 8) = GF(2) [x]/(x 8 + x 4 + x 3 + x + 1), Rijndael's finite field. Zero, as the identity, is mapped to itself. This transformation is known as the Nyberg S-box after its inventor Kaisa Nyberg. [2]

  8. Six operations - Wikipedia

    en.wikipedia.org/wiki/Six_operations

    In mathematics, Grothendieck's six operations, named after Alexander Grothendieck, is a formalism in homological algebra, also known as the six-functor formalism. [1] It originally sprang from the relations in étale cohomology that arise from a morphism of schemes f : X → Y.

  9. Jefimenko's equations - Wikipedia

    en.wikipedia.org/wiki/Jefimenko's_equations

    Jefimenko's equations can be found [2] from the retarded potentials φ and A: (,) = (′,) | ′ | ′, (,) = (′,) | ′ | ′, which are the solutions to Maxwell's equations in the potential formulation, then substituting in the definitions of the electromagnetic potentials themselves: =, = and using the relation = replaces the potentials φ and A by the fields E and B.