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qun huan gen de h.k.farahat wen ti
Author(s): 
Pages: 31-36
Year: Issue:  4
Journal: Chinese Quarterly Journal of Mathematics

Keyword:  交换环局部有限群半单性局部幂零理想群环半单环群代数半本原环素因子环根;
Abstract: <正> 令R(G)表示环R上群G的群环,群环的根如何刻化,至今尚无很好的结果。对于群代数F(G)(F是域),[4],[5]已对个别群证明JF(G)可由G的某些子群控制,即JF(G)=JF(H)·F(G),(J—指Jacohson根)。H.K.Farahat进一步提出何时等式JR(G)=(JR)(G)成立。显然,这对刻化群环的根很有价值。它将R(G)的半单性转化为R的半单性。[6],[7]中当G是局部有限群。R分别是半准素环与交换环时,证明Farahat等式对J—根成立。[3]证明了当R是交换环,G是有限群时Farahat等式对BM—根成立。
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