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This work was written under contract SC/014?88 from Eolas, the Irish Science and Technology Agency. Published in Commentationes Mathematicae Universitatis Carolinae, 34, 1 (1993), pp.1-9. http://www.karlin.mff.cuni.cz/cmuc/cmucemis/cmucemis.html

Abstract

The discrete algebras A over a commutative ring R which can be realised as the full endomorphism algebra of a torsion-free R-module have been investigated by Dugas and Gobel under the additional set-theoretic axiom of constructibility, V = L. Many interesting results have been obtained for cotorsion-free algebras but the proofs involve rather elaborate calculations in linear algebra. Here these results are rederived in a more natural topological setting and substantial generalizations to topological algebras (which could not be handled in the previous linear algebra approach) are obtained. The results obtained are independent of the usual Zermelo-Fraenkel set theory ZFC.

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