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  1. Home > Articles & Issues >
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  3. Combinatorial formul ...
Conference paper

Combinatorial formulas for double parabolic R-polynomials

Justin Lambright (1), Mark Skandera ORCID (2)
(1) Lehigh University [Bethlehem]
(2) Department of Mathematics
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Imported on
January 31, 2017
Published on
December 31, 2009
Last modified on
March 31, 2025
Volume
DMTCS Proceedings vol. AN, 22nd International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2010)
Proceedings
DOI
10.46298/dmtcs.2825
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https://about.hal.science/hal-authorisation-v1
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Combinatorial formulas for double parabolic R-polynomials

Justin Lambright (1), Mark Skandera ORCID (2)
(1) Lehigh University [Bethlehem]
(2) Department of Mathematics
Abstract
English
The well-known R-polynomials in ℤ[q], which appear in Hecke algebra computations, are closely related to certain modified R-polynomials in ℕ[q] whose coefficients have simple combinatorial interpretations. We generalize this second family of polynomials, providing combinatorial interpretations for expressions arising in a much broader class of computations. In particular, we extend results of Brenti, Deodhar, and Dyer to new settings which include parabolic Hecke algebra modules and the quantum polynomial ring.
French
Les bien connues polynômes-R en ℤ[q], qui apparaissent dans les calcules d'algébre de Hecke, sont relationés à certaines polynômes-R modifiés en ℕ[q], dont les coefficients ont simples interprétations combinatoires. Nous généralisons cette deuxième famille de polynômes, fournissant des interprétations combinatoires pour les expressions qui se posent dans une catégorie beaucoup plus vaste de calculs. En particulier, nous étendons des résultats de Brenti, Deodhar, et Dyer à des situations nouvelles, qui comprennent modules paraboliques pour l'algébre de Hecke, et l'anneau des polynômes quantiques.
Keywords
  • [MATH.MATH-CO]Mathematics [math]/Combinatorics [math.CO]
  • [INFO.INFO-DM]Computer Science [cs]/Discrete Mathematics [cs.DM]
  • Immanants
  • Kazhdan-Lusztig polynomials
  • quantum groups
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