On the connected components of the spectrum of the extended character ring of a finite group

On the connected components of the spectrum of the extended character ring of a finite group
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有限群扩展特征环谱的连通分量

DOI:
10.1016/j.jalgebra.2007.03.029
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发表时间:
2007-06
期刊:
影响因子:
0.9
通讯作者:
--
中科院分区:
数学3区
文献类型:
--
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设R(G)是有限群G的特征标环.对复数域的任意子环S,设π是其逆不位于S中的有理素数的集合,并考虑系数扩张特征环S ∈ R(G)的素谱.利用Brauer归纳定理的推广,证明了S ∈ R(G)的素谱的连通分支数等于G的π-正则共轭类数.
Let R(G) be the character ring of a finite group G. For any subring S of the complex field, let π be the set of such rational primes whose inverse do not lie in S, and consider the prime spectrum of the coefficient extended character ring S⊗R(G). By means of a generalized version of Brauer's induction theorem, we show that the number of the connected components of the prime spectrum of S⊗R(G) equals the number of the π-regular conjugacy classes of G.
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