Abstract
AbstractThe covers of cyclic acts over monoids were investigated by Mahmoudi and Renshaw (M. Mahmoudi and J. Renshaw, On covers of cyclic acts over monoids, Semigroup Forum77 (2008), 325–338) and the authors posed some open problems. In the present paper, we give answers to their problems 1 and 5, and we also give a sufficient and necessary condition that a cyclic act has a weakly pullback flat cover.
Publisher
Cambridge University Press (CUP)
Reference15 articles.
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2. On covers of cyclic acts over monoids
3. Perfect monoids revisited
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