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  2. Quadratic form - Wikipedia

    en.wikipedia.org/wiki/Quadratic_form

    The orthogonal group of a non-singular quadratic form Q is the group of the linear automorphisms of V that preserve Q: that is, the group of isometries of (V, Q) into itself. If a quadratic space ( A , Q ) has a product so that A is an algebra over a field , and satisfies ∀ x , y ∈ A Q ( x y ) = Q ( x ) Q ( y ) , {\displaystyle \forall x,y ...

  3. Group theory - Wikipedia

    en.wikipedia.org/wiki/Group_theory

    Group theory has three main historical sources: number theory, the theory of algebraic equations, and geometry. The number-theoretic strand was begun by Leonhard Euler, and developed by Gauss's work on modular arithmetic and additive and multiplicative groups related to quadratic fields.

  4. Group (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Group_(mathematics)

    The manipulations of the Rubik's Cube form the Rubik's Cube group.. In mathematics, a group is a set with an operation that associates an element of the set to every pair of elements of the set (as does every binary operation) and satisfies the following constraints: the operation is associative, it has an identity element, and every element of the set has an inverse element.

  5. Visa policy of Bolivia - Wikipedia

    en.wikipedia.org/wiki/Visa_policy_of_Bolivia

    The fee of 30 USD also applies when the visa is obtained in advance. China is lifted to Group 2 Country effective on August 17, 2014. Chinese nationals can get visa on arrival at airport or land check points as indicated by Bolivian Embassy in Beijing on December 27, 2017. [16] Nationals of Taiwan can obtain a visa on arrival for 90 days. The ...

  6. The Open Group Architecture Framework - Wikipedia

    en.wikipedia.org/wiki/The_Open_Group...

    The Open Group Architecture Framework (TOGAF) is the most used framework for enterprise architecture as of 2020 [2] that provides an approach for designing, planning, implementing, and governing an enterprise information technology architecture. [3] TOGAF is a high-level approach to design. It is typically modeled at four levels: Business ...

  7. SL2 (R) - Wikipedia

    en.wikipedia.org/wiki/SL2(R)

    SL (2, R) is a real, non-compact simple Lie group, and is the split-real form of the complex Lie group SL (2, C). The Lie algebra of SL (2, R), denoted sl (2, R), is the algebra of all real, traceless 2 × 2 matrices. It is the Bianchi algebra of type VIII.

  8. Special unitary group - Wikipedia

    en.wikipedia.org/wiki/Special_unitary_group

    The SU(n) groups find wide application in the Standard Model of particle physics, especially SU(2) in the electroweak interaction and SU(3) in quantum chromodynamics. [1] The simplest case, SU(1), is the trivial group, having only a single element. The group SU(2) is isomorphic to the group of quaternions of norm 1, and is thus diffeomorphic to ...

  9. Symmetric group - Wikipedia

    en.wikipedia.org/wiki/Symmetric_group

    The symmetric group on a finite set is the group whose elements are all bijective functions from to and whose group operation is that of function composition. [1] For finite sets, "permutations" and "bijective functions" refer to the same operation, namely rearrangement. The symmetric group of degree is the symmetric group on the set .