Article
On Certain Cross Varieties of Aperiodic Monoids with Commuting Idempotents
Results in Mathematics
Document Type
Article
Publication Date
11-1-2014
Keywords
- Monoid,
- Aperiodic monoid,
- Commuting idempotents,
- Cross varieties,
- Variety
Disciplines
Abstract
Let Acom denote the class of aperiodic monoids with commuting idempotents. It is shown that any subvariety of Acom that satisfies the identity x2yx ≈ xyx2 is Cross if and only if it excludes the almost Cross varieties J1, J2, and L. Consequently, these three almost Cross varieties are unique among all subvarieties of Acom that satisfy the identity x2yx ≈ xyx2. On the other hand, the existence of almost Cross subvarieties of Acom different from J1, J2, and L is also established.
ORCID ID
0000-0002-1662-3734
ResearcherID
I-6970-2013
DOI
10.1007/s00025-014-0390-6
Citation Information
Edmond W. H. Lee. "On Certain Cross Varieties of Aperiodic Monoids with Commuting Idempotents" Results in Mathematics Vol. 66 Iss. 3 (2014) p. 491 - 510 ISSN: 1422-6383 Available at: http://works.bepress.com/edmond-lee/18/
20M07