On injective and subdirectly irreducible S-acts over left zero semigroups
Gholamreza Moghaddasi · TURKISH JOURNAL OF MATHEMATICS · 2012
The aim of this paper is to characterize subdirectly irreducible S-acts over left zero semigroups. Also we compute the number of such acts and specify cogenerators acts over left zero semigroups. To do these we first take another look at the description of injective hulls of the separated S-acts over left zero semigroups.