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Semigroups of I-type

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arxiv math/0308071 v1 pith:3LGVGL3J submitted 2003-08-08 math.QA

Semigroups of I-type

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keywords semigroupuscrauthorconditiongeneratedsemigroupstypealgebras
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Assume that $S$ is a semigroup generated by $\{x_1,...,x_n\}$, and let $\Uscr$ be the multiplicative free commutative semigroup generated by $\{u_1,...,u_n\}$. We say that $S$ is of \emph{$I$-typ}e if there is a bijection $v:\Uscr\r S$ such that for all $a\in\Uscr$, $\{v(u_1a),... v(u_na)\}=\{x_1v(a),...,x_nv(a)\}$. This condition appeared naturally in the work on Sklyanin algebras by John Tate and the second author. In this paper we show that the condition for a semigroup to be of $I$-type is related to various other mathematical notions found in the literature. In particular we show that semigroups of $I$-type appear in the study of the settheoretic solutions of the Yang-Baxter equation, in the theory of Bieberbach groups and in the study of certain skew binomial polynomial rings which were introduced by the first author.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Integrable multi-species SSEP with reactive particle species

    math-ph 2026-07 accept novelty 6.0

    A new integrable family of exclusion processes, the (p,q)-SSEP, adds reactive particle pairs that transform or evaporate/condensate, with exact stationary densities and currents for one class of open boundaries.

  2. Twisted symmetric exclusion processes and set-theoretical $R$-matrices

    math-ph 2026-02 conditional novelty 6.0

    Lyubashenko solutions of the Yang-Baxter equation produce Markov processes equivalent to a twisted SSEP, whose stationary sectors are labeled exactly by a species profile and a total charge.