3 papers
math.GR2021
Cancellable elements of the lattice of monoid varieties
Sergey V. Gusev, Edmond W. H. Lee
The set of all cancellable elements of the lattice of semigroup varieties has recently been shown to be countably infinite. But the description of all cancellable elements of the l…
math.GR2020
Varieties of monoids with complex lattices of subvarieties
Sergey V. Gusev, Edmond W. H. Lee
A variety is finitely universal if its lattice of subvarieties contains an isomorphic copy of every finite lattice. Examples of finitely universal varieties of semigroups have been…
math.GR2019
A Survey on Varieties Generated by Small Semigroups and a Companion Website
João Araújo, João Pedro Araújo, Peter J. Cameron +2
The aim of this paper is to provide an atlas of identity bases for varieties generated by small semigroups and groups. To help the working mathematician easily find information, we…