Preprint
Oct 2026
Quasimodularity of $q$-series associated to root lattices
Motivated by conjectures arising in part from the study of class-$\mathcal{S}$ vertex algebras associated with four-dimensional supersymmetric field theories, we study multiple $q$-zeta functions attached to finite-dimensional simple Lie algebras. We prove their conjectured quasimodularity for all classical Lie algebra...
A. Milas, J. V. van Ittersum
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