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  2. Exercise book - Wikipedia

    en.wikipedia.org/wiki/Exercise_book

    There are three commonly used sizes of exercise book in the UK: A5 (148×210 mm), A4 (210×297 mm), and 178×229 mm (approximately 7″×9″, based on a traditional size used before the UK adopted ISO 216 paper sizes). They usually come with 32, 48, 64, or 80 pages which can be plain, ruled, or squared.

  3. Coherence (fairness) - Wikipedia

    en.wikipedia.org/wiki/Coherence_(fairness)

    Coherence, [1] also called uniformity [2]: Thm.8.3 or consistency, is a criterion for evaluating rules for fair division.Coherence requires that the outcome of a fairness rule is fair not only for the overall problem, but also for each sub-problem.

  4. Abelian group - Wikipedia

    en.wikipedia.org/wiki/Abelian_group

    In mathematics, an abelian group, also called a commutative group, is a group in which the result of applying the group operation to two group elements does not depend on the order in which they are written.

  5. Jacobian matrix and determinant - Wikipedia

    en.wikipedia.org/wiki/Jacobian_matrix_and...

    In vector calculus, the Jacobian matrix (/ dʒ ə ˈ k oʊ b i ə n /, [1] [2] [3] / dʒ ɪ-, j ɪ-/) of a vector-valued function of several variables is the matrix of all its first-order partial derivatives.

  6. Geometric median - Wikipedia

    en.wikipedia.org/wiki/Geometric_median

    For the 1-dimensional case, the geometric median coincides with the median.This is because the univariate median also minimizes the sum of distances from the points. (More precisely, if the points are p 1, ..., p n, in that order, the geometric median is the middle point (+) / if n is odd, but is not uniquely determined if n is even, when it can be any point in the line segment between the two ...

  7. Examples of vector spaces - Wikipedia

    en.wikipedia.org/wiki/Examples_of_vector_spaces

    A basic example of a vector space is the following. For any positive integer n, the set of all n-tuples of elements of F forms an n-dimensional vector space over F sometimes called coordinate space and denoted F n. [1]

  8. Farkas' lemma - Wikipedia

    en.wikipedia.org/wiki/Farkas'_lemma

    The latter variant is mentioned for completeness; it is not actually a "Farkas lemma" since it contains only equalities. Its proof is an exercise in linear algebra. There are also Farkas-like lemmas for integer programs. [9]: 12--14 For systems of equations, the lemma is simple: Assume that A and b have rational coefficients.

  9. Big O notation - Wikipedia

    en.wikipedia.org/wiki/Big_O_notation

    Big O notation is a mathematical notation that describes the limiting behavior of a function when the argument tends towards a particular value or infinity. Big O is a member of a family of notations invented by German mathematicians Paul Bachmann, [1] Edmund Landau, [2] and others, collectively called Bachmann–Landau notation or asymptotic notation.