Complete Semigroups of Binary Relations Defined by Semilattices of the Class ∑1(X,10)
Shota Makharadze, NEŞET AYDIN, Ali Erdoğan · Applied Mathematics · 2015
In this paper we give a full description of idempotent elements of the semigroup BX (D), which are defined by semilattices of the class ∑1 (X, 10). For the case where X is a finite set we derive formulas by means of which we can calculate the numbers of idempotent elements of the respective semigroup.