Bilateral semidirect products of transformation semigroups

Categories as algebra: An essential ingredient in the theory of monoids

Bret Tilson · Journal of Pure and Applied Algebra · 1987 · 284 citations

Natural Sciences, Mathematics, Algebra +10

The structure of idempotent semigroups. I

Naoki Kimura · Pacific Journal of Mathematics · 1958 · 118 citations · Full text

Natural Sciences, Mathematics, Set Theory +5

The kernel of monoid morphisms

John Rhodes, Bret Tilson · Journal of Pure and Applied Algebra · 1989 · 81 citations

Natural Sciences, Biology, Morphology +4

Zappa products

Michael Kunze · Acta Mathematica Academiae Scientiarum Hungaricae · 1983 · 40 citations

Semigroups of mappings on graphs

Semigroup Forum · 1983 · 36 citations

Natural Sciences, Mathematics, Topology +5