nonnegative element
61Busy beaver — In computability theory, a busy beaver (from the colloquial expression for an industrious person) is a Turing machine that attains the maximum operational busyness (such as measured by the number of steps performed, or the number of nonblank… …
62Generalized permutation matrix — In mathematics, a generalized permutation matrix (or monomial matrix) is a matrix with the same nonzero pattern as a permutation matrix, i.e. there is exactly one nonzero entry in each row and each column. Unlike a permutation matrix, where the… …
63Convex cone — In linear algebra, a convex cone is a subset of a vector space over an ordered field that is closed under linear combinations with positive coefficients. A convex cone (light blue). Inside of it, the light red convex cone consists of all points… …
64Examples of generating functions — The following examples are in the spirit of George Pólya, who advocated learning mathematics by doing and re capitulating as many examples and proofs as possible. The purpose of this article is to present common tricks of the trade in context, so …
65Lorentz transformation — A visualisation of the Lorentz transformation (full animation). Only one space coordinate is considered. The thin solid lines crossing at right angles depict the time and distance coordinates of an observer at rest with respect to that frame; the …
66Thue-Morse sequence — See also: Thue Morse constantIn mathematics and its applications, the Thue Morse sequence, or Prouhet Thue Morse sequence, is a certain binary sequence whose initial segments alternate (in a certain sense).The Thue Morse sequence begins:0… …
67Aperiodic monoid — In mathematics, an aperiodic semigroup is a semigroup S such that for every x ∈ S , there exists a nonnegative integer n such that xn = xn + 1 .An aperiodic monoid is an aperiodic semigroup which is a monoid. This notion is in some sense… …
68Covering relation — For other uses of Cover in mathematics, see Cover (mathematics). The Hasse diagram of the power set of three elements, partially ordered by inclusion. In mathematics, especially order theory, the covering relation of a partially ordered set is… …
69Thue–Morse sequence — See also: Prouhet–Thue–Morse constant 5 logical matrices that give the beginning of the T. M. sequence, when read line by line Either in set A (vertical index) …
70Octonion — In mathematics, the octonions are a normed division algebra over the real numbers, usually represented by the capital letter O, using boldface O or blackboard bold . There are only four such algebras, the other three being the real numbers R, the …
