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Fundamenta Mathematicae 148 (1995) 101-116
Bounded countable atomic compactness of ordered groups
Friedrich Wehrung 1
(1995)

We show that whenever $A$ is a monotone $\sigma$-complete dimension group, then $A^+\cup\{\infty\}$ is countably equationally compact, and we show how this property can supply the necessary amount of completeness in several kinds of problems. In particular, if $A$ is a countable dimension group and $E$ is a monotone $\sigma$-complete dimension group, then the ordered group of all relatively bounded homomorphisms from $A$ to $E$ is a monotone $\sigma$-complete dimension group.
1 :  Laboratoire de Mathématiques Nicolas Oresme (LMNO)
CNRS : UMR6139 – Université de Caen Basse-Normandie
Mathématiques/Mathématiques générales
Monotone $\sigma$-complete groups – dimension groups – equational compactness
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