Motzkin monoids and partial Brauer monoids

Dolinka, Igor, East, James and Gray, Robert D. (2017) Motzkin monoids and partial Brauer monoids. Journal of Algebra, 471. 251–298. ISSN 0021-8693

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We study the partial Brauer monoid and its planar submonoid, the Motzkin monoid. We conduct a thorough investigation of the structure of both monoids, providing information on normal forms, Green's relations, regularity, ideals, idempotent generation, minimal (idempotent) generating sets, and so on. We obtain necessary and sufficient conditions under which the ideals of these monoids are idempotent-generated. We find formulae for the rank (smallest size of a generating set) of each ideal, and for the idempotent rank (smallest size of an idempotent generating set) of the idempotent-generated subsemigroup of each ideal; in particular, when an ideal is idempotent-generated, the rank and idempotent rank are equal. Along the way, we obtain a number of results of independent interest, and we demonstrate the utility of the semigroup theoretic approach by applying our results to obtain new proofs of some important representation theoretic results concerning the corresponding diagram algebras, the partial (or rook) Brauer algebra and Motzkin algebra.

Item Type: Article
Uncontrolled Keywords: partial brauer monoids,motzkin monoids,brauer monoids,idempotents,ideals,rank,idempotent rank,diagram algebras,partial brauer algebras,motzkin algebras,cellular algebras
Faculty \ School: Faculty of Science > School of Mathematics
UEA Research Groups: Faculty of Science > Research Groups > Algebra and Combinatorics
Depositing User: Pure Connector
Date Deposited: 24 Sep 2016 00:56
Last Modified: 12 May 2023 00:18
DOI: 10.1016/j.jalgebra.2016.09.018


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