11 citations · 14 across the 6 of their papers we have counts for
7 papers · 1 filter
Automorphism groups of free groups, surface groups and free abelian groups
Martin R Bridson, Karen Vogtmann
The group of 2-by-2 matrices with integer entries and determinant can be identified either with the group of outer automorphisms of a rank two free group or with the grou…
Free-group automorphisms, train tracks and the beaded decomposition
Martin R. Bridson, Daniel Groves
We study the automorphisms ϕof a finitely generated free group F. Building on the train-track technology of Bestvina, Feighn and Handel, we provide a topological representative f:G…
Normalisers in Limit Groups
Martin R Bridson, James Howie
Let $\G$ be a limit group, $S\subset\G$ a subgroup, and the normaliser of . If has finite $\Q$-dimension, then is finitely generated and either …
The quadratic isoperimetric inequality for mapping tori of free group automorphisms I: Positive automorphisms
Martin R. Bridson, Daniel P. Groves
If is a finitely generated free group and is a positive automorphism of then satisfies a quadratic isoperimetric inequality.
Homomorphisms from automorphism groups of free groups
Martin R Bridson, Karen Vogtmann
The automorphism group of a finitely generated free group is the normal closure of a single element of order 2. If is less than then a homomorphism c…
The conjugacy and isomorphism problems for combable groups
Martin R. Bridson
There exist combable groups in which the conjugacy problem is unsolvable. The isomorphism problem is unsolvable for certain recursive sequences of finite presentations of combable…