7 citations · 12 across the 4 of their papers we have counts for
4 papers
Projection algebras and free projection- and idempotent-generated regular -semigroups
James East, Robert D. Gray, P. A. Azeef Muhammed +1
The purpose of this paper is to introduce a new family of semigroups - the free projection-generated regular -semigroups - and initiate their systematic study. Such a semigroup…
Atomicity and well quasi-order for consecutive orderings on words and permutations
Matthew McDevitt, Nik Ruskuc
Algorithmic decidability is established for two order-theoretic properties of downward closed subsets defined by finitely many obstructions in two infinite posets. The properties u…
Generating subdirect products
Peter Mayr, Nik Ruskuc
We study conditions under which subdirect products of various types of algebraic structures are finitely generated or finitely presented. In the case of two factors, we prove gener…
Geometric grid classes of permutations
Michael H. Albert, M. D. Atkinson, Mathilde Bouvel +2
A geometric grid class consists of those permutations that can be drawn on a specified set of line segments of slope \pm1 arranged in a rectangular pattern governed by a matrix. Us…