Commuting double Ockham algebras
A double Ockham algebra \((L;\wedge,\vee,0,1,f,k)\) is said to commute if the dual endomorphisms \(f\) and \(k\) are such that \(fk=kf\). In the class of commuting double Ockham algebras the subdirectly irreducible members are characterised and it is shown via Priestley duality that there are precisely nine such algebras all of which are simple.
scientific article; zbMATH DE number 5292911