There is the general principle to consider a classical invariant of a closed Riemannian
manifold M and to define its analog for the universal covering M taking the action of the …

" The subject of this book is the study of ergodic, measure preserving actions of countable
discrete groups on standard probability spaces. It explores a direction that emphasizes a …

We define for a topological group G and a family of subgroups F two versions for the
classifying space for the family F, the G-CW-version E_ F (G) and the numerable G-space …

arXiv:math/0402405v1 [math.KT] 25 Feb 2004 Page 1 arXiv:math/0402405v1 [math.KT] 25
Feb 2004 The Baum-Connes and the Farrell-Jones Conjectures in K- and L-Theory Wolfgang …

[en] This manuscript contains extended notes of the lectures presented by the author at the
summer school'High-dimensional Manifold Theory'in Trieste in May/June 2001. It is written …

A group is of type VF if it has a finite-index subgroup which has a finite classifying space. We
construct groups of type VF in which the centralizers of some elements of finite order are not …

arXiv:math/0701027v2 [math.GR] 21 Mar 2008 Page 1 arXiv:math/0701027v2 [math.GR] 21
Mar 2008 ORBIT INEQUIVALENT ACTIONS FOR GROUPS CONTAINING A COPY OF F2 …

Let $ G $ be a word hyperbolic group in the sense of Gromov and $ P $ its associated Rips
complex. We prove that the fixed point set $ P^ H $ is contractible for every finite subgroups …

Let G be a locally compact topological group and EG its universal space for the family of
compact subgroups. We give criteria for this space to be G-homotopy equivalent to a d …

Various notions of dimension for discrete groups are compared. A group is exhibited that
acts with finite stabilizers on an acyclic 2-complex in such a way that the fixed point …