Combinatorial results for semigroups of order-preserving partial transformations

Combinatorial Identities

J. Gani, J. Riordan · Technometrics · 1969 · 955 citations

Natural Sciences, Mathematics, Combinatorics +2

On the ranks of certain semigroups of order-preserving transformations

Gracinda M. S. Gomes, John Howie · Semigroup Forum · 1992 · 181 citations

Natural Sciences, Mathematics, Representation Theory +10

Products of idempotents in certain semigroups of transformations

John Howie · Proceedings of the Edinburgh Mathematical Society · 1971 · 119 citations · Full text

Natural Sciences, Mathematics, Algebra +6

On the semigroups of order-decreasing finite full transformations

Abdullahi Umar · Proceedings of the Royal Society of Edinburgh Section A Mathematics · 1992 · 63 citations

Natural Sciences, Mathematics, Algebra +6

Combinatorial results for semigroups of order-preserving mappings

Peter M. Higgins · Mathematical Proceedings of the Cambridge Philosophical Society · 1993 · 61 citations

Natural Sciences, Mathematics, Combinatorics +10