Affiliation:
1. Mathematisches Institut, University of Cologne, Weyertal 86-90, D-50931 Cologne, Germany
Abstract
Abstract
We complete several generating functions to non-holomorphic modular forms in two variables. For instance, we consider the generating function of a natural family of meromorphic modular forms of weight two. We then show that this generating series can be completed to a smooth, non-holomorphic modular form of weights $\frac 32$ and two. Moreover, it turns out that the same function is also a modular completion of the generating function of weakly holomorphic modular forms of weight $\frac 32$, which prominently appear in work of Zagier [27] on traces of singular moduli.
Funder
Deutsche Forschungsgemeinschaft
Publisher
Oxford University Press (OUP)
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