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Regulating hulls of almost completely decomposable groups
Published online by Cambridge University Press: 09 April 2009
Abstract
This note investigates torsion-free abelian groups G of finite rank which embed, as subgroups of finite index, in a finite direct sum C of subgroups of the additive group of rational numbers. Specifically, we examine the relationship between G and C when the index of G in C is minimal. Some properties of Warfield duality are developed and used (in the case that G is locally free) to relate our results to earlier ones by Burkhardt and Lady.
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- Research Article
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- Copyright © Australian Mathematical Society 1993
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