Title of article :
Covering theory for complexes of groups
Author/Authors :
Seonhee Lim، نويسنده , , Anne Thomas، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
We develop an explicit covering theory for complexes of groups, parallel to that developed for graphs of groups by Bass. Given a covering of developable complexes of groups, we construct the induced monomorphism of fundamental groups and isometry of universal covers. We characterize faithful complexes of groups and prove a conjugacy theorem for groups acting freely on polyhedral complexes. We also define an equivalence relation on coverings of complexes of groups, which allows us to construct a bijection between such equivalence classes, and subgroups or overgroups of a fixed lattice Γ in the automorphism group of a locally finite polyhedral complex X.
Journal title :
Journal of Pure and Applied Algebra
Journal title :
Journal of Pure and Applied Algebra