# ALGEBRAIC COMBINATORICS

Promotion on oscillating and alternating tableaux and rotation of matchings and permutations
Algebraic Combinatorics, Volume 3 (2020) no. 1, pp. 107-141.

Using Henriques’ and Kamnitzer’s cactus groups, Schützenberger’s promotion and evacuation operators on standard Young tableaux can be generalised in a very natural way to operators acting on highest weight words in tensor products of crystals.

For the crystals corresponding to the vector representations of the symplectic groups, we show that Sundaram’s map to perfect matchings intertwines promotion and rotation of the associated chord diagrams, and evacuation and reversal. We also exhibit a map with similar features for the crystals corresponding to the adjoint representations of the general linear groups.

We prove these results by applying van Leeuwen’s generalisation of Fomin’s local rules for jeu de taquin, connected to the action of the cactus groups by Lenart, and variants of Fomin’s growth diagrams for the Robinson–Schensted correspondence.

Revised:
Accepted:
Published online:
DOI: https://doi.org/10.5802/alco.87
Classification: 05E18,  05E10
Keywords: Promotion, evacuation, cactus group
Pfannerer, Stephan 1; Rubey, Martin 1; Westbury, Bruce 2

1. Fakultät für Mathematik und Geoinformation TU Wien, Austria
2. Department of Mathematics University of Texas at Dallas, U.S.A.
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Pfannerer, Stephan; Rubey, Martin; Westbury, Bruce. Promotion on oscillating and alternating tableaux and rotation of matchings and permutations. Algebraic Combinatorics, Volume 3 (2020) no. 1, pp. 107-141. doi : 10.5802/alco.87. https://alco.centre-mersenne.org/articles/10.5802/alco.87/

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