Document Type : Original Manuscript
Author
Department of Mathematics, Hakikm Sabzevari University, P.O.Bo 397, Sabzevar, Iran.
Abstract
In this paper we study the notions of cogenerator and subdirectly irreducible in the category of S-poset. First we give some
necessary and sufficient conditions for a cogenerator $S$-posets. Then we see that under some conditions, regular injectivity implies generator and cogenerator. Recalling Birkhoff's Representation Theorem for algebra, we study subdirectly irreducible S-posets and give this theorem for the category of ordered right acts over an ordered monoid. Among other things, we give the relations between cogenerators and subdirectly irreducible S-posets.
Keywords
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