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arXiv 2405.04422math.GT
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同伦辫群是无挠的

Homotopy braid groups are torsion-free

Emmanuel Graff

AI总结:

该研究证明任意分支数的同伦辫群均无挠,推广了既有结论,明确解答了辫群非阿贝尔无挠商群的存在性问题,基于焊接辫图解理论与Artin表示完成证明,并得到辫群无挠的新证法。

摘要:

我们证明,对任意数量的分支,在链环同伦意义下的辫群都是无挠的。这一结论推广了Humphries针对至多6个分支的结果,并明确解答了Lin提出、Linell与Schick研究过的关于辫群是否存在非阿贝尔无挠商群的问题。证明基于焊接辫的图解理论,并运用了Artin表示。作为推论,我们得到了辫群本身无挠的又一种证明。

英文摘要:

We show that, for any number of components, the group of braids up to link-homotopy is torsion-free. This generalizes a result of Humphries up to six components, and provides an explicit solution to a question posed by Lin and addressed by Linell and Schick regarding the existence of non-abelian torsion-free quotients of the braid group. The proof relies on the diagrammatic theory of welded braids and uses the Artin representation. As a corollary, we obtain yet another proof that braid groups themselves are torsion-free.

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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