arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1602.04842math.GR
收藏

线性群的剩余线性度的量化

Quantifying Residual Finiteness of Linear Groups

Daniel Franz

摘要:

正规剩余有限性增长度量了一个有限生成群被它的有限生成元近似的程度。我们发现,任何线性群$Γ\leq \mathrm{GL}_d(K)$有正常的剩余有限增长渐近上界的$(n\log n)^{d^2-1}$,值得注意的是,这个界只依赖于程度的线性$Γ$。当$Γ$是高阶Chevalley群$G$的一个子群时,我们也给出了精确的渐近性,并计算了这些情形下的非正态残差有限增长.特别地,$G(\mathbb{Z})$和$G(\mathbb{F}_p[t])$的有限指数子群具有正规剩余有限增长性$n^{\dim(G)}.$

英文摘要:

Normal residual finiteness growth measures how well a finitely generated group is approximated by its finite quotients. We show that any linear group $Γ\leq \mathrm{GL}_d(K)$ has normal residual finiteness growth asymptotically bounded above by $(n\log n)^{d^2-1}$; notably this bound depends only on the degree of linearity of $Γ$. We also give precise asymptotics in the case that $Γ$ is a subgroup of a higher rank Chevalley group $G$ and compute the non-normal residual finiteness growth in these cases. In particular, finite index subgroups of $G(\mathbb{Z})$ and $G(\mathbb{F}_p[t])$ have normal residual finiteness growth $n^{\dim(G)}.$

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。

↑