8 citations · 9 across the 2 of their papers we have counts for
2 papers
math.AT2003★ 8 cited
L^2-Betti Numbers of Discrete Measured Groupoids
Roman Sauer
There are notions of L^2-Betti numbers for discrete groups (Cheeger-Gromov, Lueck), for type II_1-factors (recent work of Connes-Shlyakhtenko) and for countable standard equivalenc…
math.AT2003★ 1 cited
Homological Invariants and Quasi-Isometry
Roman Sauer
Building upon work of Y. Shalom we give a homological-algebra flavored definition of an induction map in group homology associated to a topological coupling. As an application we o…