On the unions of ascending chains of direct sums of ideals of h-local Prüfer domains

Details On the unions of ascending chains of direct sums of ideals of h-local Prüfer domains On the unions of ascending chains of direct sums of ideals of h-local Prüfer domains

2011-12-02

arxiv.org/abs/1112.0600v1

Algebra Colloquium 18(Spec 1), pp. 749-757, 2011

Mathematics

Commutative Algebra

Communicated by J. Zhang

Scientific paper

In this work, we investigate conditions under which unions of ascending chains of modules which are isomorphic to direct sums of ideals of an integral domain are again isomorphic to direct sums of ideals. We obtain generalizations of the Pontryagin-Hill theorems for modules which are direct sums of ideals of h-local Pr\"{u}fer domains. Particularly, we prove that a torsion-free module over a Dedekind domain with a countable number of maximal ideals is isomorphic to a direct sum of ideals if it is the union of a countable ascending chain of pure submodules which are isomorphic to direct sums of ideals.

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