Mirabolic group

In mathematics, a mirabolic subgroup of the general linear group GL_n(k), studied by Gelfand & Kajdan (1975), is a subgroup consisting of automorphisms fixing a given non-zero vector in k. Its image in the projective general linear group is a parabolic subgroup consisting of all elements fixing a given point of projective space. The word "mirabolic" is a portmanteau of "miraculous parabolic". As an algebraic group, a mirabolic subgroup is the semidirect product of a vector space with its group of automorphisms, and such groups are called mirabolic groups. The mirabolic subgroup is used to define the Kirillov model of a representation of the general linear group.

单词	Mirabolic
释义	Mirabolic 英语百科 Mirabolic group In mathematics, a mirabolic subgroup of the general linear group GL_n(k), studied by Gelfand & Kajdan (1975), is a subgroup consisting of automorphisms fixing a given non-zero vector in k. Its image in the projective general linear group is a parabolic subgroup consisting of all elements fixing a given point of projective space. The word "mirabolic" is a portmanteau of "miraculous parabolic". As an algebraic group, a mirabolic subgroup is the semidirect product of a vector space with its group of automorphisms, and such groups are called mirabolic groups. The mirabolic subgroup is used to define the Kirillov model of a representation of the general linear group.
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