Michael Tweedale

activity

20052007

most citedDeficiency and abelianized deficiency of some virtually free groups

15 citations · 16 across the 3 of their papers we have counts for

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3 papers · 1 filter

math.GR2007

Constructing presentations of subgroups of right-angled Artin groups

Martin R. Bridson, Michael Tweedale

Let $G$ be the right-angled Artin group associated to the flag complex $Σ$ and let $π : G \to Z$ be its canonical height function. We investigate the presentation theory of the groups…

math.GR2006★ 15 cited

Deficiency and abelianized deficiency of some virtually free groups

Martin R. Bridson, Michael Tweedale

Let $Q_{m}$ be the HNN extension of $Z / m \times Z / m$ where the stable letter conjugates the first factor to the second. We explore small presentations of the groups $Γ_{m,n}=Q_m \a…

math.GR2005★ 1 cited

Limit groups, positive-genus towers and measure equivalence

Martin R Bridson, Michael Tweedale, Henry Wilton

By definition, an $ω$ -residually free tower is positive-genus if all surfaces used in its construction are of positive genus. We prove that every limit group is virtually a subgrou…