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On projective QTAG-modules
Journal article

On projective QTAG-modules

01/01/2019

Abstract

countably generated modules General Topology Logic Mathematics module n omega+n projective modules summable modules
In this paper we introduce the new class of QTAG-modules namely $\omega_1$-$(\omega+n)$-projective modules, which is an amalgamation of three important classes of modules: $n$-bounded modules, the direct sum of uniserial modules and the countably generated modules. This class is given many equivalent characterizations including being the smallest class containing the $(\omega+n)$-projective modules that is closed with respect to $\omega_1$-bijective homomorphisms.

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