Nonabelian Fully-Ramified Sections

Nonabelian Fully-Ramified Sections
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DOI:
10.4153/cjm-1996-052-8
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发表时间:
1996-10
期刊:
Canadian Journal of Mathematics
影响因子:
--
通讯作者:
M. Lewis
M. Lewis
中科院分区:
其他
文献类型:
--
作者:
M. Lewis

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摘要设G为有限群,设K和L为G的正规子群,使得|K: L|和|G: K|是相对素数,并设|K: L|为奇数。设H是G的一个子群,使得G = HK且H∩K = L。设φ是L的一个不可约特征,它在L的作用下不变,并且是关于K/L的完全分枝。若χ∈Irr(G)是φG的一个组成部分,则证明χ h具有奇重性的唯一不可约组成部分。
Abstract Let G be a finite group and let K and L be normal subgroups of G such that |K : L| and |G : K| are relatively prime, and assume that |K : L| is odd. Let H be a subgroup of G such that G = HK and H ∩ K = L. Let φ be an irreducible character of L that is invariant under the action of L and is fully ramified with respect to K/L. If χ ∈ Irr(G) is a constituent of φG, then we prove that χH has a unique irreducible constituent having odd multiplicity.