Congruences on generalized inverse semigroups.
Congruences on ordered groupoids.
Congruences on regular semigroups.
Congruences on semigroups of continuous selfmaps.
Congruences on semigroups which are perfect rectangular bands of inverse semigroups.
Congruences on simple extensions of semigroups.
Congruences on strong semilattices of regular simple semigroups.
Conjugacy in monoids.
Conjugation in semigroups and finite dimensional algebras
Connected algebraic monoids.
Connected CM-homomorphisms into
Connected CM-homomorphisms into semigroups of closed binary relations on hereditarily locally connected cont inua.
Connections between left adequate semigroups and ...-semigroups.
Constructing finitely presented monoids which have no finite complete presentation.
Constructing inverse monoids from small categories.
Constructing ordered groupoids
Constructing the maximal monoids in the semigroups , and
Construction and representation of regular semigroups.
Construction de codes indécomposables
Construction of medial semigroups