Group extensions ofp-adic and adelic linear groups

Group extensions ofp-adic and adelic linear groups
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DOI:
10.1007/bf02698923
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发表时间:
1968-12
期刊:
Publications Mathématiques de l'Institut des Hautes Études Scientifiques
影响因子:
--
通讯作者:
C. Moore
C. Moore
中科院分区:
其他
文献类型:
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作者:
C. Moore

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如果G是一个群,a是一个阿贝尔群,使得G作为自同构的群作用于a(即a是一个G模),那么我们就定义了上同态群H^ G, a), n^ 9[17]——群H^ G, a)表示G的交叉同态成a模的主同态,或者如果G作用于a[17],就简单地说Horn (G, a)。如果A是一个G模,那么G被A扩展就是一个精确序列
If G is a group and A an abelian group such that G operates on A as a group of automorphisms (ie, A is a G-module), then one has defined cohomology groups H^ G, A), n^ 9 [17]-The group H^ G, A) represents the crossed homomorphisms of G into A modulo the principal ones, or simply Horn (G, A) if G operates trivially on A [17]. If A is a G-module, an extension of G by A is an exact sequence