hal-00204952v2Communication dans un congrès Adrien Boussicault, Jean-Gabriel Luque. Staircase Macdonald polynomials and the $q$-Discriminant Krattenthaler, Christian and Sagan, Bruce. 20th Annual International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2008), 2008, Viña del Mar, Chile. Discrete Mathematics and Theoretical Computer Science, DMTCS Proceedings vol. AJ, 20th Annual International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2008), pp.381-392, 2008, DMTCS Proceedings