Subgroups of free idempotent generated regular semigroups

The biorder on the partial groupoid of idempotents of a semigroup

Francis Pastijn · Journal of Algebra · 1980 · 40 citations

Natural Sciences, Architectural Theory, Combinatorics +5

Idempotent-generated completely O-simple semigroups

Francis Pastijn · Semigroup Forum · 1977 · 20 citations

Natural Sciences, Computer Science, Dynamical Systems +4

The partial groupoid of idempotents of a regular semigroup

A. H. Clifford · Semigroup Forum · 1975 · 15 citations

Natural Sciences, Classics, Representation Theory +5