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Theta lifts for Lorentzian lattices and coefficients of mock theta functions
Mathematische Zeitschrift ( IF 1.0 ) Pub Date : 2020-07-09 , DOI: 10.1007/s00209-020-02572-y
Jan Hendrik Bruinier , Markus Schwagenscheidt

We evaluate regularized theta lifts for Lorentzian lattices in three different ways. In particular, we obtain formulas for their values at special points involving coefficients of mock theta functions. By comparing the different evaluations, we derive recurrences for the coefficients of mock theta functions, such as Hurwitz class numbers, Andrews' spt-function, and Ramanujan's mock theta functions.

中文翻译:

洛伦兹格的 Theta 提升和模拟 theta 函数的系数

我们以三种不同的方式评估洛伦兹格的正则化 theta 提升。特别是,我们在涉及模拟 theta 函数系数的特殊点处获得了它们的值的公式。通过比较不同的评估,我们推导出模拟 theta 函数系数的递归,例如 Hurwitz 类数、Andrews 的 spt 函数和 Ramanujan 的模拟 theta 函数。
更新日期:2020-07-09
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