Abstract
Ramanujan, in his unpublished manuscripts, had written down without proof, explicit linear combinations of cusp forms whose Mellin transforms possess Euler products in the sense of Hecke. All these results are proved here and their connection with the work of Hecke, Rankin and Serre is pointed out.
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Rangachari, S.S. Ramanujan and dirichlet series with euler products. Proc. Indian Acad. Sci. (Math. Sci.) 91, 1–15 (1982). https://doi.org/10.1007/BF02837257
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DOI: https://doi.org/10.1007/BF02837257