Identities and bases in the hypoplactic monoid
Rings and Algebras
2021-07-14 v3 Combinatorics
Group Theory
Abstract
This paper presents new results on the identities satisfied by the hypoplactic monoid. We show how to embed the hypoplactic monoid of any rank strictly greater than 2 (including infinite rank) into a direct product of copies of the hypoplactic monoid of rank 2. This confirms that all hypoplactic monoids of rank greater than or equal to 2 satisfy exactly the same identities. We then give a complete characterization of those identities, and prove that the variety generated by the hypoplactic monoid has finite axiomatic rank, by giving a finite basis for it.
Keywords
Cite
@article{arxiv.2010.06953,
title = {Identities and bases in the hypoplactic monoid},
author = {Alan J. Cain and António Malheiro and Duarte Ribeiro},
journal= {arXiv preprint arXiv:2010.06953},
year = {2021}
}
Comments
19 pages