On the Andreadakis Problem for Subgroups of $IA_n$
On the Andreadakis Problem for Subgroups of $IA_n$
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关于 $IA_n$ 子群的 Andreadakis 问题
DOI:
10.1093/imrn/rnz237
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发表时间:
2018
影响因子:
1
通讯作者:
Jacques Darn'e
中科院分区:
文献类型:
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作者:
Jacques Darn'e
Let $F_n$ be the free group on $n$ generators. Consider the group $IA_n$ of automorphisms of $F_n$ acting trivially on its abelianization. There are two canonical filtrations on $IA_n$: the 1st one is its lower central series $\Gamma _*$; the 2nd one is the Andreadakis filtration $\mathcal A_*$, defined from the action on $F_n$. The Andreadakis problem consists in understanding the difference between these filtrations. Here, we show that they coincide when restricted to the subgroup of triangular automorphisms and to the pure braid group.
DOI:
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发表时间:
2019
期刊:
影响因子:
--
作者:
Kenjiro T. Miura;R.U. Gobithaasan;Peter Salvi;Dan Wang;Tadatoshi Sekine;Shin Usuki;Jun-ichi Inoguchi;Kenji Kajiwara;佐藤 隆夫
通讯作者:
佐藤 隆夫