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On a certain class of modular functions |
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| Authors: | Winfried Kohnen |
| Institution: | Mathematisches Institut, Universität Heidelberg, INF 288, D-69120 Heidelberg, Germany |
| Abstract: | We give a characterization of those meromorphic modular functions on a subgroup of finite index of the full modular group whose divisors are supported at the cusps, in terms of the growth of the exponents of their infinite product expansions. |
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