论文标题

有限和无限组的传播

The spread of finite and infinite groups

论文作者

Harper, Scott

论文摘要

众所周知,每个有限的简单组都有生成对。此外,Guralnick和Kantor证明,每个有限的简单组具有更强的属性,称为$ \ frac {3} {2} $ - 生成,每个非平凡元素都包含在生成对中。最近,该结果已被概括为三个不同的方向,这构成了本调查文章的基础。首先,我们查看一些更强的形式的$ \ frac {3} {2} $ - 有限简单组满足的生成,这些形式是用涂抹和统一的统治来描述的。接下来,我们讨论有限$ \ frac {3} {2} $生成的组的最新分类。最后,我们将注意力转移到无限的群体上,重点是最近发现的发现,汤普森的简单群体也是$ \ frac {3} {2} $ - 生成的,就像他们的许多概括一样。在整篇文章中,我们在该领域提出了开放的问题,我们强调了与小组理论的其他领域的联系。

It is well known that every finite simple group has a generating pair. Moreover, Guralnick and Kantor proved that every finite simple group has the stronger property, known as $\frac{3}{2}$-generation, that every nontrivial element is contained in a generating pair. Much more recently, this result has been generalised in three different directions, which form the basis of this survey article. First, we look at some stronger forms of $\frac{3}{2}$-generation that the finite simple groups satisfy, which are described in terms of spread and uniform domination. Next, we discuss the recent classification of the finite $\frac{3}{2}$-generated groups. Finally, we turn our attention to infinite groups, focusing on the recent discovery that the finitely presented simple groups of Thompson are also $\frac{3}{2}$-generated, as are many of their generalisations. Throughout the article we pose open questions in this area, and we highlight connections with other areas of group theory.

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