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  2. Leibniz formula for determinants - Wikipedia

    en.wikipedia.org/wiki/Leibniz_formula_for...

    In algebra, the Leibniz formula, named in honor of Gottfried Leibniz, expresses the determinant of a square matrix in terms of permutations of the matrix elements. If A {\displaystyle A} is an n × n {\displaystyle n\times n} matrix, where a i j {\displaystyle a_{ij}} is the entry in the i {\displaystyle i} -th row and j {\displaystyle j} -th ...

  3. Bareiss algorithm - Wikipedia

    en.wikipedia.org/wiki/Bareiss_algorithm

    In mathematics, the Bareiss algorithm, named after Erwin Bareiss, is an algorithm to calculate the determinant or the echelon form of a matrix with integer entries using only integer arithmetic; any divisions that are performed are guaranteed to be exact (there is no remainder).

  4. Determinant - Wikipedia

    en.wikipedia.org/wiki/Determinant

    In mathematics, the determinant is a scalar-valued function of the entries of a square matrix.The determinant of a matrix A is commonly denoted det(A), det A, or | A |.Its value characterizes some properties of the matrix and the linear map represented, on a given basis, by the matrix.

  5. Dodgson condensation - Wikipedia

    en.wikipedia.org/wiki/Dodgson_condensation

    In mathematics, Dodgson condensation or method of contractants is a method of computing the determinants of square matrices.It is named for its inventor, Charles Lutwidge Dodgson (better known by his pseudonym, as Lewis Carroll, the popular author), who discovered it in 1866. [1]

  6. List of formulas in Riemannian geometry - Wikipedia

    en.wikipedia.org/wiki/List_of_formulas_in...

    This is a list of formulas encountered in Riemannian geometry. Einstein notation is used throughout this article. This article uses the "analyst's" sign convention for Laplacians, except when noted otherwise.

  7. Catholic nun arrested for bringing mafia messages to prisoners

    www.aol.com/catholic-nun-arrested-bringing-mafia...

    An Italian nun was arrested Thursday as part of a long investigation that led to the arrests of 25 suspects and the seizure of over 1,800,000 euros.

  8. Online sports betting has trickled down to high school football

    www.aol.com/sports/online-sports-betting...

    At first, BetOnline accepted bets on a handful of high school football games per year, the online gaming site’s brand manager, Dave Mason, told Yahoo Sports.

  9. Seven-dimensional cross product - Wikipedia

    en.wikipedia.org/wiki/Seven-dimensional_cross...

    The numbers under the Fano diagrams (the set of lines in the diagram) indicate a set of indices for seven independent products in each case, interpreted as ijk → e i × e j = e k. The multiplication table is recovered from the Fano diagram by following either the straight line connecting any three points, or the circle in the center, with a ...