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arXiv 2302.04078math.GRmath.DSmath.OA
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源于纯无穷广群的Thompson群V的推广

Generalisations of Thompson's group V arising from purely infinite groupoids

Eusebio Gardella, Owen Tanner

AI总结:

研究源于纯无穷极小广群拓扑全群的Thompson群V推广,证明导出子群性质并给出群论刻画,同时完整抽象刻画此类群并描述Brin-Higman-Thompson群的特征。

摘要:

我们研究一类Thompson群$V$的推广,它们自然地作为纯无穷、极小广群的拓扑全群出现。在此过程中,我们证明此类群的导出子群在有限生成时是2-生成的,并且在完全一般性下没有真特征。我们通过对这些全群施加包括活力、$V$的适当嵌入的存在性以及可压缩性在内的一系列群论条件来刻画此类广群。此外,我们给出了作为纯无穷、极小广群的拓扑全群或导出子群出现的那些群的完整抽象刻画。作为应用,我们描述了Brin-Higman-Thompson群的所有真特征。

英文摘要:

We study a class of generalisations of Thompson's group $V$ arising naturally as topological full groups of purely infinite, minimal groupoids. In the process, we show that the derived subgroup of such a group is 2-generated whenever it is finitely generated and has no proper characters in full generality. We characterise this class of groupoids through a number of group-theoretic conditions on their full groups including vigor, the existence of suitable embeddings of $V$, and compressibility. We moreover give a complete abstract characterisation of those groups that arise as either topological full groups or derived subgroups of purely infinite, minimal groupoids. As an application, we describe all proper characters of the Brin-Higman-Thompson groups.

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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