3 papers
math.GT2008
L^2-Torsion and Bounded Measure Equivalence of Groups
Christian Wegner
This paper has been withdrawn by the author due to an error in the proof of Proposition 4.8.
math.GT2008
On the behaviour of the Atiyah Conjecture under taking subgroups and under taking quotients with finite kernel
Christian Wegner
We state and prove a condition under which the strong Atiyah Conjecture carries over to subgroups. Moreover, we show that if a group satisfies the (strong) Atiyah Conjecture then a…
math.GT2008
L^2-Invariants of Finite Aspherical CW-Complexes
Christian Wegner
Let be a finite aspherical CW-complex whose fundamental group possesses a subnormal series with a non-trivial elementary amenable g…