Article ID Journal Published Year Pages File Type
4660128 Topology and its Applications 2011 8 Pages PDF
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.

Related Topics
Physical Sciences and Engineering Mathematics Geometry and Topology