Crystal Bases of Quantum Affine Algebras and Affine Kazhdan-Lusztig Polynomials

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We present a fast version of the algorithm of Lascoux, Leclerc, and Thibon for the lower global crystal base for the Fock representation of quantum affine sl_n. We also show that the coefficients of the lower global crystal base coincide with certain affine Kazhdan-Lusztig polynomials. It is known that the coefficients of the global crystal base are q-analogues of decomposition numbers for Specht modules of the Hecke algebra of type A_n, and that the coefficients of the affine Kazhdan-Lusztig polynomials are q-analogues of decomposition numbers for tilting modules for quantum sl_k. Thus our algorithm allows fast computation of these decomposition numbers.
22 pages, amslatex

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Quantum Algebra, Combinatorics, 17B37

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http://salesiana.dossiersoluciones.com/handle/123456789/77116

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/9807014
 http://arxiv.org/abs/math/9807014

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arXiv