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单词 AffineAlgebraicGroup
释义

affine algebraic group


An affine algebraic group over a field k is quasi-affine variety G (a locally closed subset of affine space) over k, which is a equipped with a group such that the multiplication map m:G×GG and inverse map i:GG are algebraicMathworldPlanetmath.

For example, k is an affine algebraic group over itself with the group law being addition, and as is k*=k-{0} with the group law multiplication. Other common examples of affine algebraic groups are GLnk, the general linear groupMathworldPlanetmath over k (identifying matrices with affine space) and any algebraic torus over k.

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更新时间:2025/5/5 0:17:08