Dimension invariants of outer automorphism groups
Dimension invariants of outer automorphism groups
The geometric dimension for proper actions \underline{\mathrm{gd}}(G) of a group G is the minimal dimension of a classifying space for proper actions \underline{E}G . We construct for every integer r\geq 1 , an example of a virtually torsion-free Gromov-hyperbolic group G such that for every group \Gamma which contains G …