5 citations · 5 across the 1 of their papers we have counts for
3 papers
math.GR2008★ 5 cited
The Sigma Invariants of Thompson's Group F
Robert Bieri, Ross Geoghegan, Dessislava Kochloukova
Thompson's group F is the group of all increasing dyadic piecewise linear homeomorphisms of the closed unit interval. We compute Sigma^m(F) and Sigma^m(F;Z), the homotopical and ho…
math.GR1998
Connectivity properties of group actions on non-positively curved spaces II: The geometric invariants
Robert Bieri, Ross Geoghegan
This is the second of two papers but has been written so as to have minimal dependence on the first paper (which is also on this archive). Let G be a group and let M be a CAT(0) pr…
math.GR1998
Connectivity properties of group actions on non-positively curved spaces I: Controlled connectivity and openness results
Robert Bieri, Ross Geoghegan
Let G be a group and let M be a CAT(0) proper metric space (e.g. a simply connected complete Riemannian manifold of non-positive sectional curvature or a locally finite tree). Isom…