A special congruence lattice of a regular semigroup.
A structure theorem for right invariant right holoids.
A structure theorem for right pp-semigroups with left central idempotents
The concept of strong spined product of semigroups is introduced. We first show that a semigroup S is a rpp-semigroup with left central idempotents if and only if S is a strong semilattice of left cancellative right stripes. Then, we show that such kind of semigroups can be described by the strong spined product of a C-rpp-semigroup and a right normal band. In particular, we show that a semigroup is a rpp-semigroup with left central idempotents if and only if it is a right bin.
A study of operands in terms of maximal generalized orbits.
A subdirectly irreducible band accepting a = a.
A SURVEY OF SEMIGROUPS OF CONTINUOUS SELFMAPS.
A synchronization property of pure subsemigroups.
-systems
A theorem concerning the restriction of the -structure of a semigroup to a subsemigroup of
A theorem on binary relations and infinite languages.
A theorem on doubly transitive permutation groups with application to universal algebras
A theorem on free envelopes.
A theorem on normal semigroups
A theory of transformation monoids: combinatorics and representation theory.
A unified syntactical approach to theorems of Putcha, Margolis, and Straubing on finite power semigroups.
A uniform chain whose inverse semigroup has no chart.
Abian's order relation for semigroups.
About presentations of braid groups and their generalizations
In the paper we give a survey of rather new notions and results which generalize classical ones in the theory of braids. Among such notions are various inverse monoids of partial braids. We also observe presentations different from standard Artin presentation for generalizations of braids. Namely, we consider presentations with small number of generators, Sergiescu graph-presentations and Birman-Ko-Lee presentation. The work of V.~V.~Chaynikov on the word and conjugacy problems for the singular...
About the finiteness of monoids generated by closures and interiors.
Absolute flatness of regular semigroups with a finite height function.