arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.03570math.GR
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整群环和亏块$1$中单位的阶

Orders of units in integral group rings and blocks of defect $1$

Mauricio Caicedo, Leo Margolis

摘要:

证明了如果有限群$G$的Sylow $p$ -子群是$p$阶的,则$G$的整群环的正规单位群包含$pq$阶的正规单位当且仅当$G$包含$pq$阶的元素,其中$q$是任意素数.我们利用这个结果回答了大多数散在单群和一些李型单群的素图问题,包括一类新的此类群的无穷级数。我们的方法是基于对循环亏损块和Young tableaux组合的理解。

英文摘要:

We show that if the Sylow $p$-subgroup of a finite group $G$ is of order $p$, then the normalized unit group of the integral group ring of $G$ contains a normalized unit of order $pq$ if and only if $G$ contains an element of order $pq$, where $q$ is any prime. We use this result to answer the Prime Graph Question for most sporadic simple groups and some simple groups of Lie type, including a new infinite series of such groups. Our methods are based on the understanding of blocks of cyclic defect and Young tableaux combinatorics.

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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