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Cohomology and extensions of regular semigroups
Published online by Cambridge University Press: 09 April 2009
Abstract
Let S be a regular semigroup and A a D(S)-module. We proved in a previous paper that the set Ext(S, A) of equivalence classes of extensions of A by S admits an abelian group structure and studied its functorial properties. The main aim of this paper is to describe Ext(S, A) as a second cohomology group of certain chain complex.
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- Research Article
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- Copyright © Australian Mathematical Society 1983
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