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math.GR2010★ 2 cited
The Dehn function of Baumslag's Metabelian Group
Martin Kassabov, Tim Riley
Baumslag's group is a finitely presented metabelian group with a Z \wr Z subgroup. There is an analogue with an additional torsion relation in which this subgroup becomes C_m \wr Z…
math.GR2010
Hydra groups
Will Dison, Tim Riley
We give examples of CAT(0), biautomatic, free-by-cyclic, one-relator groups which have finite-rank free subgroups of huge (Ackermannian) distortion. This leads to elementary exampl…