08A35 4 08B20 3 17A30 3 endomorphism semigroup 3 08A30 2 automorphism 2 16S50 1 16S60,16G20 1 18B35 1 18E05 1 \(g\)-dimonoid 1 abelian dimonoid 1 automorphism group 1 congruence 1 dimonoid 1 finitary incidence algebra 1 free abelian diband 1 free abelian dimonoid 1 free commutative \(g\)-dimonoid 1 partially ordered category,quasiordered set 1