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  2. Mordell curve - Wikipedia

    en.wikipedia.org/wiki/Mordell_curve

    y 2 = x 3 + 1, with solutions at (-1, 0), (0, 1) and (0, -1). In algebra, a Mordell curve is an elliptic curve of the form y 2 = x 3 + n, where n is a fixed non-zero integer. [1]These curves were closely studied by Louis Mordell, [2] from the point of view of determining their integer points.

  3. X + Y sorting - Wikipedia

    en.wikipedia.org/wiki/X_+_Y_sorting

    [1] [3] A variant of the problem sorts the sumset , the set of sums of pairs, with duplicate sums condensed to a single value. For this variant, the size of the sumset may be significantly smaller than n 2 {\displaystyle n^{2}} , and output-sensitive algorithms for constructing it have been investigated.

  4. Equation xy = yx - Wikipedia

    en.wikipedia.org/wiki/Equation_xy_=_yx

    "Rational Solutions to x^y = y^x". CTK Wiki Math. Archived from the original on 2021-08-15 "x^y = y^x - commuting powers". Arithmetical and Analytical Puzzles. Torsten Sillke. Archived from the original on 2015-12-28. dborkovitz (2012-01-29). "Parametric Graph of x^y=y^x". GeoGebra.

  5. Rotation of axes in two dimensions - Wikipedia

    en.wikipedia.org/wiki/Rotation_of_axes_in_two...

    A point P has coordinates (x, y) with respect to the original system and coordinates (x′, y′) with respect to the new system. [1] In the new coordinate system, the point P will appear to have been rotated in the opposite direction, that is, clockwise through the angle . A rotation of axes in more than two dimensions is defined similarly.

  6. List of mathematic operators - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematic_operators

    In mathematics, an operator or transform is a function from one space of functions to another. Operators occur commonly in engineering, physics and mathematics. Many are integral operators and differential operators.

  7. Nine-point stencil - Wikipedia

    en.wikipedia.org/wiki/Nine-point_stencil

    Or, for different anisotropic effects using the same vector field [14] θ = arctan ⁡ ( V y / − V x ) {\displaystyle \theta =\arctan(V_{y}/-V_{x})} It is important to note that, regardless of the values of θ {\displaystyle \theta } , the anisotropic propagation will occur parallel to the secondary direction c2 and perpendicular to the ...

  8. Marginal distribution - Wikipedia

    en.wikipedia.org/wiki/Marginal_distribution

    Joint and marginal distributions of a pair of discrete random variables, X and Y, dependent, thus having nonzero mutual information I(X; Y). The values of the joint distribution are in the 3×4 rectangle; the values of the marginal distributions are along the right and bottom margins.

  9. Cauchy's functional equation - Wikipedia

    en.wikipedia.org/wiki/Cauchy's_functional_equation

    [1] The fifth problem on Hilbert's list is a generalisation of this equation. Functions where there exists a real number c {\displaystyle c} such that f ( c x ) ≠ c f ( x ) {\displaystyle f(cx)\neq cf(x)} are known as Cauchy-Hamel functions and are used in Dehn-Hadwiger invariants which are used in the extension of Hilbert's third problem ...