Comptes Rendus
Combinatoire, Théorie des groupes
Affine twisted length function
Nathan Chapelier-Laget1 
1 Institut Denis Poisson at the University of Tours (CNRS), France.
Comptes Rendus. Mathématique, Volume 359 (2021) no. 7, pp. 873-879.

Let W a be an affine Weyl group. In 1987 Jian Yi Shi gave a characterization of the elements w∈W a in terms of Φ + -tuples (k(w,α)) α∈Φ + called the Shi vectors. Using these coefficients, a formula is provided to compute the standard length of W a . In this note we express the twisted affine length function of W a in terms of the Shi coefficients.

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DOI : 10.5802/crmath.227
Nathan Chapelier-Laget 1

1 Institut Denis Poisson at the University of Tours (CNRS), France.
Licence : CC-BY 4.0
Droits d'auteur : Les auteurs conservent leurs droits 
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Nathan Chapelier-Laget. Affine twisted length function. Comptes Rendus. Mathématique, Volume 359 (2021) no. 7, pp. 873-879. doi : 10.5802/crmath.227. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.5802/crmath.227/

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