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- W4313483702 abstract "The hypoplactic monoid was introduced by Krob and Thibon through a presentation and through quasi-ribbon tableaux and an insertion algorithm. Just as Kashiwara crystals enriched the structure of the plactic monoid and allowed its generalization, the first and third authors of this paper introduced a construction of the hypoplactic monoid by identifying vertices in a quasi-crystal graph derived from the crystal graph associated to the general linear Lie algebra. Although this construction is based on Kashiwara's work, it cannot be extended to other crystal graphs, since the analogous quasi-Kashiwara operators on words do not admit a recursive definition. This paper addresses these issues. A general notion of quasi-crystal is introduced, followed by a study of its properties and relation with crystals. A combinatorial study of quasi-crystals is then made by associating a quasi-crystal graph to each quasi-crystal, which for the class of seminormal quasi-crystals results in a one-to-one correspondence. To model the binary operation of the hypoplactic monoid by quasi-crystals, a notion of quasi-tensor product of quasi-crystals is introduced, along with a combinatorial way of computing it similar to the signature rule for the tensor product of crystals. This framework allows the generalization of the classical hypoplactic monoid to a family of hypoplactic monoids associated to the various simple Lie algebras. The quasi-crystal structure is then used to establish algebraic properties of the hypoplactic monoid associated to the symplectic Lie algebra." @default.
- W4313483702 created "2023-01-06" @default.
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- W4313483702 date "2022-12-31" @default.
- W4313483702 modified "2023-09-30" @default.
- W4313483702 title "Quasi-crystals for arbitrary root systems and associated generalizations of the hypoplactic monoid" @default.
- W4313483702 doi "https://doi.org/10.48550/arxiv.2301.00271" @default.
- W4313483702 hasPublicationYear "2022" @default.
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