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arXiv 0709.0064math.GR
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关于有限群在循环扩张中陪集间共轭类的分布

On the distribution of conjugacy classes between the cosets of a finite group in a cyclic extension

John R. Britnell, Mark Wildon

摘要:

设G是有限群,H是正规子群,使得G/H是循环群.给定G的一个共轭类g^G,我们定义它的中心化子群为HC_G(g).设K使得H \le K \le G.我们证明了K中包含的G-共轭类(其中心化子群为K)均匀分布在K中H的陪集之间。这个结果的证明是完全初等的。作为应用,我们找到了K在其自身作用下的共轭类数的表达式,其形式为仅与G的作用相关的量。

英文摘要:

Let G be a finite group and H a normal subgroup such that G/H is cyclic. Given a conjugacy class g^G of G we define its centralizing subgroup to be HC_G(g). Let K be such that H\le K\le G. We show that the G-conjugacy classes contained in K whose centralizing subgroup is K, are equally distributed between the cosets of H in K. The proof of this result is entirely elementary. As an application we find expressions for the number of conjugacy classes of K under its own action, in terms of quantities relating only to the action of G.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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