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math.GR2019
Polynomial-time proofs that groups are hyperbolic
Derek Holt, Stephen Linton, Max Neunhoeffer +3
It is undecidable in general whether a given finitely presented group is word hyperbolic. We use the concept of pregroups, introduced by Stallings, to define a new class of van Kam…
math.GR2016
A method for building permutation representations of finitely presented groups
Gabriele Nebe, Richard Parker, Sarah Rees
We design an algorithm to find certain partial permutation representations of a finitely presented group (the bricks) that may be combined to a transitive permutation represent…