Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4660128 | Topology and its Applications | 2011 | 8 Pages |
Abstract
Cohomology groups Hs(Zn,Zm) are studied to describe all groups up to isomorphism which are (central) extensions of the cyclic group Zn by the Zn-module Zm. Further, for each such a group the number of non-equivalent extensions is determined.
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Mathematics
Geometry and Topology