Free-by-cyclic groups, automorphisms and actions on nearly canonical trees
Free-by-cyclic groups, automorphisms and actions on nearly canonical trees
复制标题
自由循环群、自同构和近规范树上的作用
DOI:
10.1016/j.jalgebra.2022.03.033
复制
发表时间:
2022
影响因子:
0.9
通讯作者:
Andrew N
中科院分区:
文献类型:
--
作者:
Andrew N
We study the automorphism groups of free-by-cyclic groups and show these are finitely generated in the following cases: (i) when defining automorphism has linear growth and (ii) when the rank of the underlying free group has rank at most 3.The techniques we use are actions on trees, including the trees of cylinders due to Guirardel and Levitt, the relative hyperbolicity of free-by-cyclic groups (due to Gautero and Lustig, Ghosh, and Dahmani and Li) and the filtration of the automorphisms of a group preserving a tree, following Bass and Jiang, and Levitt. Our general strategy is to produce an invariant tree for the group and study that, usually reducing the initial problem to some sort of McCool problem (the study of an automorphism group fixing some collection of conjugacy classes of subgroups) for a group of lower complexity. The obstruction to pushing these techniques further, inductively, is in finding a suitable invariant tree and in showing that the relevant McCool groups are finitely generated.
登录
查看更多内容
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
G. Levitt
通讯作者:
G. Levitt
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
F. Dahmani
通讯作者:
F. Dahmani
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
G. Levitt
通讯作者:
G. Levitt
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
E. Ventura
通讯作者:
E. Ventura
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
M. Bestvina;Mark Feighn;M. Handel
通讯作者:
M. Handel