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Three subgroups lemma information


In mathematics, more specifically group theory, the three subgroups lemma is a result concerning commutators. It is a consequence of Philip Hall and Ernst Witt's eponymous identity.

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Three subgroups lemma

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In mathematics, more specifically group theory, the three subgroups lemma is a result concerning commutators. It is a consequence of Philip Hall and Ernst...

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Perfect group

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Z_{2},G]=[[G,Z_{2}],G]=[[Z_{2},G],G]\subseteq [Z_{1},G]=1.} By the three subgroups lemma (or equivalently, by the Hall-Witt identity), it follows that [G...

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Commutator

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bracket Pincherle derivative Poisson bracket Ternary commutator Three subgroups lemma Fraleigh (1976, p. 108) Herstein (1975, p. 65) McKay (2000, p. 4)...

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Jacobi identity

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{\mathcal {L}}_{X}Y} . Structure constants Super Jacobi identity Three subgroups lemma (Hall–Witt identity) C. G. J. Jacobi (1862), §26, Theorem V. T....

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Philip Hall

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process Isoclinism of groups Regular p-group Three subgroups lemma Hall algebra, and Hall polynomials Hall subgroup Hall–Higman theorem Hall–Littlewood polynomial...

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Product of group subsets

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T are subgroups. The product of two subgroups S and T of a group G is itself a subgroup of G if and only if ST = TS. If S and T are subgroups of G, their...

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Splitting lemma

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mathematics, and more specifically in homological algebra, the splitting lemma states that in any abelian category, the following statements are equivalent...

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Margulis lemma

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In differential geometry, the Margulis lemma (named after Grigory Margulis) is a result about discrete subgroups of isometries of a non-positively curved...

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Isomorphism theorems

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correspondence between the set of subgroups of G {\displaystyle G} containing N {\displaystyle N} and the set of (all) subgroups of G / N {\displaystyle G/N}...

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Direct product of groups

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P as containing the original groups G and H as subgroups. These subgroups of P have the following three important properties: (Saying again that we identify...

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Gelfand pair

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pair for every G-normal subgroup N of K. For many purposes it suffices to consider K without any such non-identity normal subgroups. The action of G on the...

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Group action

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ring ...). The general linear group GL(n, K) and its subgroups, particularly its Lie subgroups (including the special linear group SL(n, K), orthogonal...

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Composition series

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entirely to subgroups invariant under the action of elements from Ω, called Ω-subgroups. Thus Ω-composition series must use only Ω-subgroups, and Ω-composition...

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Category of groups

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to the identity), three elements such that their product on one fixed side is always itself (the projections onto the three subgroups of order two), and...

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Dihedral group of order 6

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with the identity, form a subgroup of order 3, index 2, and the swaps of two blocks, each with the identity, form three subgroups of order 2, index 3. The...

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Mathematics of Sudoku

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construct Sudokus and related tables of numbers. Namely, one has to take subgroups and quotient groups into account: Take for example Z n ⊕ Z n {\displaystyle...

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Small cancellation theory

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finitely generated subgroups are finitely presented) and, moreover, locally quasiconvex (that is where all finitely generated subgroups are quasiconvex)...

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Signalizer functor

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p'} -subgroups of the centralizers of nonidentity elements in one or several given noncyclic elementary abelian p {\displaystyle p} -subgroups of G ...

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Semidirect product

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e, a subgroup H, and a normal subgroup N ◁ G, the following statements are equivalent: G is the product of subgroups, G = NH, and these subgroups have...

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Projective linear group

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elements mod n; the kernels are called the principal congruence subgroups. A noteworthy subgroup of the projective general linear group PGL(2, Z) (and of the...

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Free abelian group

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the free modules over the integers. Lattice theory studies free abelian subgroups of real vector spaces. In algebraic topology, free abelian groups are...

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