Comultiplication on monoids.
Concerning congruences on symmetric inverse semigroups
Concerning restrictions of Green's H equivalence.
Conditions for strong Morita equivalence of partially ordered semigroups
We investigate when a partially ordered semigroup (with various types of local units) is strongly Morita equivalent to a posemigroup from a given class of partially ordered semigroups. Necessary and sufficient conditions for such equivalence are obtained for a series of well-known classes of posemigroups. A number of sufficient conditions for several classes of naturally ordered posemigroups are also provided.
Congruence relations on left canonic semigroups.
Congruence-free inverse semigroups.
Congruence-free regular semigroups with zero.
Congruences associated with inverse transversals.
Congruences on an inverse Bruck-Reilly monoid. Part I: Non-group congruences.
Congruences on bands of π-groups
A semigroup S is said to be completely π-regular if for any a ∈ S there exists a positive integer n such that aⁿ is completely regular. The present paper is devoted to the study of completely regular semigroup congruences on bands of π-groups.
Congruences on Bruck-Reilly extensions of monoids.
Congruences on conventional semigroups
Congruences on generalized inverse semigroups.
*-Congruences on regular *-semigroups.
Congruences on semigroups which are perfect rectangular bands of inverse semigroups.
Congruences on strong semilattices of regular simple semigroups.
Conjugation in semigroups and finite dimensional algebras
Connected algebraic monoids.
Connections between left adequate semigroups and ...-semigroups.
Construction and representation of regular semigroups.