The ring of monomial representations I. Structure theory

The ring of monomial representations I. Structure theory
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单项式表示环 I. 结构理论

DOI:
10.1016/0021-8693(71)90132-3
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发表时间:
1971
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通讯作者:
A. Dress
A. Dress
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作者:
A. Dress

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设G是有限群,A是有限阿贝尔群,G在其上右作用:(a,g)++ as(uEA,gEG). A(G,A)-集S是一个有限集,其上半直积G × A通过从左到右的置换作用,使得ACG>:A自由作用. (We假设-A和G嵌入G x cl中,因此aog = gcag。)对于两个(G,A)-集S和Y,定义S+ Y为S和Y的不交并,具有明显的G × A-作用,定义5 'aA Y为关于A-作用的笛卡尔积S × Y中的A-轨道的集合
Let G be a finite group and A a finite abelian group, on which G acts from the right:(a, g)++ as (u EA, g EG). A (G,@-set S is a finite set, on which the semidirect product G x A acts bv permutations from the left, such that ACG>: A acts freely.(We assume-A and G to be imbedded in G x cl, thusaog= gcag.)For two (G, A)-sets S and Y define S+ Y to be the disjoint union of S and Y with the obvious G x A-action and define 5’aA Y to be the set of A-orbits in the Cartesian product S x Y with respect to the A-action