词条 | Congruence-permutable algebra |
释义 | {{unreferenced|date=February 2015}} In universal algebra, two congruences are said to be permutable if . A congruence-permutable algebra is one in which all congruences are permutable. A variety of algebras is congruence-permutable if every algebra in the variety is congruence-permutable. A Mal'cev term is a term M for which A congruence-permutable variety is one whose signature contains a Mal'cev term. Most classical varieties in abstract algebra, such as groups, rings, and Lie algebras, are congruence-permutable. Any variety that contains a group operation is congruence-permutable, and the Mal'cev term is . {{abstract-algebra-stub}} 1 : Universal algebra |
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