Hall-Littlewood polynomials and characters of affine Lie algebras
| Autor: | Bartlett, Nick, Warnaar, S. Ole |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Advances in Mathematics 285 (2015), 1066-1105 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.aim.2015.08.011 |
| Popis: | The Weyl-Kac character formula gives a beautiful closed-form expression for the characters of integrable highest-weight modules of Kac-Moody algebras. It is not, however, a formula that is combinatorial in nature, obscuring positivity. In this paper we show that the theory of Hall-Littlewood polynomials may be employed to prove Littlewood-type combinatorial formulas for the characters of certain highest weight modules of the affine Lie algebras C_n^{(1)}, A_{2n}^{(2)} and D_{n+1}^{(2)}. Through specialisation this yields generalisations for B_n^{(1)}, C_n^{(1)}, A_{2n-1}^{(2)}, A_{2n}^{(2)} and D_{n+1}^{(2)} of Macdonald's identities for powers of the Dedekind eta-function. These generalised eta-function identities include the Rogers-Ramanujan, Andrews-Gordon and G\"ollnitz-Gordon q-series as special, low-rank cases. Comment: 33 pages, proofs of several conjectures from the earlier version have been included |
| Databáze: | arXiv |
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