Endomorphism regular Ockham algebras of finite boolean type

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4 Citations (Scopus)

Abstract

If (L; f) is an Ockham algebra with dual space (X; g), then it is known that the semigroup of Ockham endomorphisms on L is (anti-)isomorphic to the semigroup Lambda(X; g) of continuous order-preserving mappings on X that commute with g. Here we consider the case where L is a finite boolean lattice and fis a bijection. We begin by determining the size of Lambda(X; g), and obtain necessary and sufficient conditions for this semigroup to be regular or orthodox. We also describe its structure when it is a group, or an inverse semigroup that is not a group. In the former case it is a cartesian product of cyclic groups and in the latter a cartesian product of cyclic groups each with a zero adjoined.

Original languageEnglish
Pages (from-to)99-110
Number of pages12
JournalGlasgow Mathematical Journal
Volume39
Publication statusPublished - Jan 1997

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