Abstract
In this work we consider an association of meromorphic Jacobi forms of half-integral index to the pure D-type cases of umbral moonshine, and solve the module problem for four of these cases by constructing vertex operator superalgebras that realise the corresponding meromorphic Jacobi forms as graded traces. We also present a general discussion of meromorphic Jacobi forms with half-integral index and their relationship to mock modular forms.
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Notes
Our nomenclature follows [15], except that elliptic forms are assumed to be holomorphic in that work, and the focus there is on integral index.
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Acknowledgements
We thank Andrew O’Desky for discussions on closely related topics, and we thank the anonymous referees for helpful comments and suggestions. The work of M.C. was supported by ERC starting grant H2020 ERC StG #640159. J.D. acknowledges support from the Simons Foundation (#316779), and the U.S. National Science Foundation (DMS 1203162, DMS 1601306).
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Communicated by Y. Kawahigashi
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Cheng, M.C.N., Duncan, J.F.R. Meromorphic Jacobi Forms of Half-Integral Index and Umbral Moonshine Modules. Commun. Math. Phys. 370, 759–780 (2019). https://doi.org/10.1007/s00220-019-03540-2
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DOI: https://doi.org/10.1007/s00220-019-03540-2