1 citations · 1 across the 2 of their papers we have counts for
4 papers
Geometric characterization of flat groups of automorphisms
Udo Baumgartner, Günter Schlichting, George A. Willis
If H is a flat group of automorphisms of finite rank n of a totally disconnected, locally compact group G, then each orbit of H in the metric space B(G) of compact, open subgroups…
Hecke algebras from groups acting on trees and HNN extensions
Udo Baumgartner, Marcelo Laca, Jacqui Ramagge +1
We study Hecke algebras of groups acting on trees with respect to geometrically defined subgroups. In particular, we consider Hecke algebras of groups of automorphisms of locally f…
Cusps of lattices in rank 1 Lie groups over local fields
Udo Baumgartner
Let G be the group of rational points of a semisimple algebraic group of rank 1 over a nonarchimedean local field. We improve upon Lubotzky's analysis of graphs of groups describin…
Contraction groups and scales of automorphisms of totally disconnected locally compact groups
Udo Baumgartner, George A. Willis
We study contraction groups for automorphisms of totally disconnected locally compcat groups using the scale of the automorphism as a tool. The contraction group is shown to be unb…