Constrained abstract representation problems in semigroups and partial groupoids
A. Mani · Glasnik Matematicki · 2004
Abstract. In this paper dierent constrained abstract representa-tion theorems for partial groupoids and semigroups are proved. Methods for improving the retract properties of the structures are also developed. These have strong class-theoretical implications for many types of gener-alized periodic semigroups and related partial semigroups. The results are signi cant in a model-theoretical setting. 1.