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arXiv 0812.0037math.GRmath.OA
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Thompson群及其应用的新表述

New Presentations of Thompson's Groups and Applications

Uffe Haagerup, Gabriel Picioroaga

摘要:

我们发现新的介绍汤普森集团$F$,衍生组$F^{'}$和中间组$D$。这些表示有一个共同点,即它们的关系元是相同的,只有生成集不同。作为这些介绍的应用,我们提取以下结果:组$F^{'}$的成本是1,因此成本不能决定(非)顺从问题的$F$ ; $II_1$因子$L(F^{'})$是内渐近阿贝尔和减少$C^*$ -代数的$F$是不是剩余有限维。

英文摘要:

We find new presentations for the Thompson's groups $F$, the derived group $F^{'}$ and the intermediate group $D$. These presentations have a common ground in that their relators are the same and only the generating sets differ. As an application of these presentations we extract the following consequences: the cost of the group $F^{'}$ is 1 hence the cost cannot decide the (non)amenability question of $F$; the $II_1$ factor $L(F^{'})$ is inner asymptotically abelian and the reduced $C^*$-algebra of $F$ is not residually finite dimensional.

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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