James East

activity

20072026

most citedMotzkin monoids and partial Brauer monoids

31 citations · 211 across the 34 of their papers we have counts for

collaborators

Showing 2019Show all

4 papers · 1 filter

math.GR2019

Structure of principal one-sided ideals

James East

We give a thorough structural analysis of the principal one-sided ideals of arbitrary semigroups, and then apply this to full transformation semigroups and symmetric inverse monoid…

math.GR2019★ 5 cited

Sandwich semigroups in diagram categories

Ivana Đurđev, Igor Dolinka, James East

This paper concerns a number of diagram categories, namely the partition, planar partition, Brauer, partial Brauer, Motzkin and Temperley-Lieb categories. If $K$ denotes a…

math.GR2019

Idempotents and one-sided units: Lattice invariants and a semigroup of functors on the category of monoids

James East

For a monoid $M$ , we denote by $G (M)$ the group of units, $E (M)$ the submonoid generated by the idempotents, and $G_{L} (M)$ and $G_{R} (M)$ the submonoid…

math.GR2019

Green's relations and stability for subsemigroups

James East, Peter M. Higgins

We prove new results on inheritance of Green's relations by subsemigroups in the presence of stability of elements. We provide counterexamples in other cases to show in particular…