Richard D. Wade

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math.GR2023

Commensurations of $Aut (F_{N})$ and its Torelli subgroup

Martin R. Bridson, Richard D. Wade

For $N \geq 3$ , the abstract commensurators of both $Aut (F_{N})$ and its Torelli subgroup $IA_{N}$ are isomorphic to $Aut (F_{N})$ itself.

math.GR2019

Calculating the virtual cohomological dimension of the automorphism group of a RAAG

Matthew B. Day, Andrew W. Sale, Richard D. Wade

We describe an algorithm to find the virtual cohomological dimension of the automorphism group of a right-angled Artin group. The algorithm works in the relative setting; in partic…

math.GR2019

Commensurations of subgroups of $Out (F_{N})$

Camille Horbez, Richard D. Wade

A theorem of Farb and Handel asserts that for $N \geq 4$ , the natural inclusion from $Out (F_{N})$ into its abstract commensurator is an isomorphism. We give a new proof of the…

Commensurations of Aut(FN​) and its Torelli subgroup

Calculating the virtual cohomological dimension of the automorphism group of a RAAG

Commensurations of subgroups of Out(FN​)

Commensurations of $Aut (F_{N})$ and its Torelli subgroup

Commensurations of subgroups of $Out (F_{N})$