Groups, Geometry, and Dynamics


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Volume 5, Issue 1, 2011, pp. 121–138
DOI: 10.4171/GGD/118

Published online: 2011-01-19

The cohomology of Bestvina–Brady groups

Ian J. Leary[1] and Müge Saadetoğlu[2]

(1) University of Southampton, UK
(2) Eastern Mediterranean University, Gazimağusa, North Cyprus, Turkey

For each subcomplex of the standard CW-structure on any torus, we compute the homology of a certain infinite cyclic regular covering space. In all cases when the homology is finitely generated, we also compute the cohomology ring. For aspherical subcomplexes of the torus, our computation gives the homology of the groups introduced by M. Bestvina and N. Brady in [3]. We compute the cohomological dimension of each of these groups.

Keywords: Cohomological dimension, cohomology ring, Bestvina–Brady group, Artin group

Leary Ian, Saadetoğlu Müge: The cohomology of Bestvina–Brady groups. Groups Geom. Dyn. 5 (2011), 121-138. doi: 10.4171/GGD/118