The decomposition theorem for abelian groups

non-divisibility for abelian groups

Throughout all groups are abelian. We say a group G is n-divisible if nG = G. If G has no non-zero n-divisible subgroups for all n>1 then we say that G is absolutely non-divisible. In the study of class C consisting   all absolutely non-divisible groups such as G, we come across the sub groups T_p(G) = the sum of all p-divisible subgroups and rad_p(G) = the intersection of all p^nG. The proper...

Hindman’s Theorem in Abelian Groups

Hindman’s theorem tells us that for every finite colouring/partition of the natural numbers, there is an infinite subset X for which every finite subset X0 Ď X has the same colour for ř X0. Certain generalisations of this theorem to abelian groups are known to fail in the uncountable case but an example exists for boolean groups when the desired homogeneous set is finite. In this paper, I will ...

The Structure Theorem for Finitely Generated Abelian Groups

This paper provides a thorough explication of the Structure Theorem for Abelian groups and of the background information necessary to prove it. The outline of this paper is as follows. We first consider some theorems related to abelian groups and to R-modules. In this section we see that every finitely generated abelian group is the epimorphic image of a finitely generated free abelian group. H...

The Hahn Embedding Theorem for Abelian Lattice-ordered Groups

Decomposition of Elements in Abelian Groups*

In the present paper we determine necessary and sufficient conditions for an abelian group to have the property Pw . The author first proved the validity of these conditions for fields, but, as noted by T. Nakayama, the operation X does not occur, so that the theory may be stated for a system of elements with only one operation + defined for these elements. Groups with the property Pn have usef...