FINITELY GENERATED SEMIGROUPS HAVING PRESENTATION WITH REGULAR CONGRUENCE CLASSES
Kunitaka Shoji · Scientiae mathematicae Japonicae · 2009
For a finitely generated semigroup S, there exist a finite alphabet X and a surjective homomorphism φ of X + to S. We say that S has a presentation given by X and φ. In this paper, we investigate finitely generated semigroups having a presentation with regular congruence classes or with finite congruence classes.