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math.GR2000★ 8 cited
Two-dimensional Artin groups with CAT(0) dimension three
Noel Brady, John Crisp
We exhibit 3-generator Artin groups which have finite 2-dimensional Eilenberg-Mac Lane spaces, but which do not act properly discontinuously by semi-simple isometries on a 2-dimens…
math.GR2000★ 38 cited
The solution to a conjecture of Tits on the subgroup generated by the squares of the generators of an Artin group
John Crisp, Luis Paris
It was conjectured by Tits that the only relations amongst the squares of the standard generators of an Artin group are the obvious ones, namely that a^2 and b^2 commute if ab=ba a…