Order relations on symmetric semigroups of transformations and on their homomorphic images.
Order theoretic variants of the fundamental theorem of compact semigroups.
Ordered semigroups containing minimal and maximal elements.
Ordered sets which support inverse semigroups : Three examples.
Ordering D-classes and computing Schein rank is hard.
Ordering the local subsemigroups of a semigroup.
Orders of subsemigroups of Tn.
Ordres maximaux
Orthodox bands of modules
Orthodox congruences on regular semigroups.
Orthodox semidirect products and wreath products of monoids.
Orthodox semigroups.
Orthodox semigroups whose idempotents satisfy a certain identity.
Orthodox semigroups with complemented congruence lattices.
Orthodox -semigroups.
O-simple strictly regular semigroups.