3 papers
math.GR2026
A virtual RAAG with no finite index normal RAAG
Oli Jones
In this note, we exhibit a group which has a right-angled Artin group as a finite index subgroup, but no finite index normal subgroup isomorphic to any right-angled Artin group. Th…
math.GR2025
Fixed subgroups of generalised Baumslag-Solitar groups
Oli Jones, Alan Logan
We investigate fixed subgroups of automorphisms of generalised Baumslag-Solitar (GBS) groups. Our main results are for automorphisms leaving a Bass-Serre tree invariant, under the…
math.GR2024
Type VF for outer automorphism groups of large-type Artin groups
Oli Jones
Given a connected large-type Artin group , we introduce a deformation space . If is triangle-free, or has all labels at least 6, we show that this space is…