自由产物自同构群的稳定性
Stabilité homologique pour les groupes d'automorphismes des produits libres
摘要:
我们在这篇文章中表明,对于任何群$G$不可分解的自由积 * 和非同构的$\mathbf{Z}$,规范包含${\rm Aut}(G^{*n})\to {\rm Aut}(G^{* n+1})$诱导同构之间的同调群$H_i$ $n\geq 2i+2$,如由Hatcher和Wahl。事实上,我们证明了更多-特别是,结果是真实的任何组$G$,如果我们取代的自同构群的自由积的对称自同构的子群。为了这个目的,我们使用的结构和无环性的结果,由于麦卡洛-米勒和陈格洛弗-詹森和函子性质,使我们能够应用经典的方法在函子同源。
英文摘要:
We show in this article that, for any group $G$ indecomposable for the free product * and non-isomorphic to $\mathbf{Z}$, the canonical inclusion ${\rm Aut}(G^{*n})\to {\rm Aut}(G^{* n+1})$ induces an isomorphism between the homology groups $H_i$ for $n\geq 2i+2$, as was conjectured by Hatcher and Wahl. In fact we show a little more --- in particular, the result is true for any group $G$ if we replace the automorphism group of the free product by the subgroup of symmetric automorphisms. For this purpose we use constructions and acyclicity results due to McCullough-Miller and Chen-Glover-Jensen and functoriality properties which allow us to apply classical methods in functor homology.
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。