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arXiv · 2502.03316

Hidden $SL_2(\mathbb{Z})$-symmetry in $BC_l^{(2)}$

K. Iohara·Y. Saito
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Abstract

A well-known \(\Gamma_\theta\)-action on the characters of integrable highest weight modules over the affine Lie algebra of type \(BC_l^{(2)}\) at a positive level is extended to an \(\mathrm{SL}_2(\mathbb{Z})\)-action at a positive even level by supplementing their twisted characters.

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BibTeXRIS

K. Iohara, Y. Saito. 2025-02-05. Hidden $SL_2(\mathbb{Z})$-symmetry in $BC_l^{(2)}$. https://arxiv.org/abs/2502.03316

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