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arXiv 0705.4122math.GR
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求有限群的最小置换表示

Finding Minimal Permutation Representations of Finite Groups

Ben Elias, Lior Silberman, Ramin Takloo-Bighash

摘要:

有限群G的最小置换表示是具有最小可能大小的忠实G-集。我们研究了这种表示的结构,并表明,对于某些群体,他们可能会得到一个贪婪的建设。在这些情况下(除了当中心对合介入时),所有最小置换表示具有相同的轨道大小集。利用同样的思想,我们还证明了:如果一个极小忠实G-集的大小d(G)至少是c |G|(对于某个c>0),则d(G)= |G| /m + O(1)(对于一个整数m),隐含常数依赖于c.

英文摘要:

A minimal permutation representation of a finite group G is a faithful G-set with the smallest possible size. We study the structure of such representations and show that for certain groups they may be obtained by a greedy construction. In these situations (except when central involutions intervene) all minimal permutation representations have the same set of orbit sizes. Using the same ideas we also show that if the size d(G) of a minimal faithful G-set is at least c|G| for some c>0 then d(G) = |G|/m + O(1) for an integer m, with the implied constant depending on c.

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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