When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Pairing function - Wikipedia

    en.wikipedia.org/wiki/Pairing_function

    Whether this is the only polynomial pairing function is still an open question. When we apply the pairing function to k 1 and k 2 we often denote the resulting number as k 1, k 2 . [citation needed] This definition can be inductively generalized to the Cantor tuple function [citation needed]

  3. Baker–Campbell–Hausdorff formula - Wikipedia

    en.wikipedia.org/wiki/Baker–Campbell...

    The above lists all summands of order 6 or lower (i.e. those containing 6 or fewer X 's and Y 's). The X ↔ Y (anti-)/symmetry in alternating orders of the expansion, follows from Z(Y, X) = −Z(−X, −Y). A complete elementary proof of this formula can be found in the article on the derivative of the exponential map.

  4. Consistent and inconsistent equations - Wikipedia

    en.wikipedia.org/wiki/Consistent_and...

    The system + =, + = has exactly one solution: x = 1, y = 2 The nonlinear system + =, + = has the two solutions (x, y) = (1, 0) and (x, y) = (0, 1), while + + =, + + =, + + = has an infinite number of solutions because the third equation is the first equation plus twice the second one and hence contains no independent information; thus any value of z can be chosen and values of x and y can be ...

  5. Carlson symmetric form - Wikipedia

    en.wikipedia.org/wiki/Carlson_symmetric_form

    In general, the arguments x, y, z of Carlson's integrals may not be real and negative, as this would place a branch point on the path of integration, making the integral ambiguous. However, if the second argument of R C {\displaystyle R_{C}} , or the fourth argument, p, of R J {\displaystyle R_{J}} is negative, then this results in a simple ...

  6. Cayley transform - Wikipedia

    en.wikipedia.org/wiki/Cayley_transform

    (by a formula Cayley had published the year before), except scaled so that w = 1 instead of the usual scaling so that w 2 + x 2 + y 2 + z 2 = 1. Thus vector (x,y,z) is the unit axis of rotation scaled by tan θ ⁄ 2. Again excluded are 180° rotations, which in this case are all Q which are symmetric (so that Q T = Q).

  7. Rotation matrix - Wikipedia

    en.wikipedia.org/wiki/Rotation_matrix

    The sum of the entries along the main diagonal (the trace), plus one, equals 4 − 4(x 2 + y 2 + z 2), which is 4w 2. Thus we can write the trace itself as 2w 2 + 2w 2 − 1; and from the previous version of the matrix we see that the diagonal entries themselves have the same form: 2x 2 + 2w 2 − 1, 2y 2 + 2w 2 − 1, and 2z 2 + 2w 2 − 1. So ...

  8. Milne-Thomson method for finding a holomorphic function

    en.wikipedia.org/wiki/Milne-Thomson_method_for...

    He is really interested in problems 3 and 4, but the answers to the easier problems 1 and 2 are needed for proving the answers to problems 3 and 4. 1st problem [ edit ]

  9. Gödel's β function - Wikipedia

    en.wikipedia.org/wiki/Gödel's_β_function

    In mathematical logic, Gödel's β function is a function used to permit quantification over finite sequences of natural numbers in formal theories of arithmetic. The β function is used, in particular, in showing that the class of arithmetically definable functions is closed under primitive recursion, and therefore includes all primitive recursive functions.