| Automorphism groups of RAAGs and partially symmetric automorphisms of free groups |
| Kai-Uwe Bux, Ruth Charney and Karen Vogtmann |
| to appear in Groups, Geometry and Dynamics |
We compute the virtual cohomological dimension (VCD) of the group of partially symmetric outer automorphisms of a free group. We use this to obtain new upper and lower bounds on the VCD of the outer automorphism group of a two-dimensional right-angled Artin group. In the case of a right-angled Artin group with defining graph a tree, the bounds agree. |