extension group
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Group extension — In mathematics, a group extension is a general means of describing a group in terms of a particular normal subgroup and quotient group. If Q and N are two groups, then G is an extension of Q by N if there is a short exact sequence:1 ightarrow N… … Wikipedia
Extension (mathematics) — In mathematics, the word extension has many uses. See:Analysis* Carathéodory s extension theorem * Continuous linear extension * M. Riesz extension theorem * Krein extension theorem * Hahn Banach theoremAlgebra* Abelian extension * Algebraic… … Wikipedia
Group theory — is a mathematical discipline, the part of abstract algebra that studies the algebraic structures known as groups. The development of group theory sprang from three main sources: number theory, theory of algebraic equations, and geometry. The… … Wikipedia
Group 6 element — Group → 6 ↓ Period 4 24 Cr 5 … Wikipedia
Group 10 element — Group 10 redirects here. For the rugby league competition, see Group 10 Rugby League. Group → 4 ↓ Period 4 … Wikipedia
Group 7 element — Group → 7 ↓ Period 4 25 Mn 5 … Wikipedia
Group 11 element — Group → 11 ↓ Period 4 29 Cu 5 … Wikipedia
Group 9 element — Group → 4 ↓ Period 4 27 Co 5 … Wikipedia
Group action — This article is about the mathematical concept. For the sociology term, see group action (sociology). Given an equilateral triangle, the counterclockwise rotation by 120° around the center of the triangle acts on the set of vertices of the… … Wikipedia
Extension (semantics) — In any of several studies that treat the use of signs, for example in linguistics, logic, mathematics, semantics, and semiotics, the extension of a concept, idea, or sign consists of the things to which it applies, in contrast with its… … Wikipedia
extension — [[t]ɪkste̱nʃ(ə)n[/t]] extensions 1) N COUNT An extension is a new room or building which is added to an existing building or group of buildings. 2) N COUNT: usu with supp An extension is a new section of a road or rail line that is added to an… … English dictionary
