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Bosonic formulas for affine branching functions

E. Feigin
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Abstract

In this paper we derive two bosonic (alternating sign) formulas for branching functions for general affine Kac-Moody Lie algebra $\g$. Both formulas are given in terms of the Weyl group and string functions of $\g$.

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E. Feigin. 2006-04-17. Bosonic formulas for affine branching functions. https://arxiv.org/abs/math/0604370

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