Relative hyperbolicity, classifying spaces, and lower algebraic K-theory

Details Relative hyperbolicity, classifying spaces, and lower algebraic K-theory Relative hyperbolicity, classifying spaces, and lower algebraic K-theory

2006-06-19

arxiv.org/abs/math/0606473v1

Topology 46 (2007), pgs. 527-553

Mathematics

K-Theory and Homology

24 pages, some commutative diagrams

Scientific paper

For $\Gamma$ a relatively hyperbolic group, we construct a model for the universal space among $\Gamma$-spaces with isotropy on the family VC of virtually cyclic subgroups of $\Gamma$. We provide a recipe for identifying the maximal infinite virtually cyclic subgroups of Coxeter groups which are lattices in $O^+(n,1)= \iso(\mathbb H^n)$. We use the information we obtain to explicitly compute the lower algebraic K-theory of the Coxeter group $\gt$ (a non-uniform lattice in $O^+(3,1)$). Part of this computation involves calculating certain Waldhausen Nil-groups for $\mathbb Z[D_2]$, $\mathbb Z[D_3]$.

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