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arxiv: 2304.13978 · v2 · pith:K5LXMYGG · submitted 2023-04-27 · math.NT

Applications of Ramanujan's work on Eisenstein series

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keywords ramanujanserieseisensteinworkapplicationscertaincheng-continue
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Ramanujan (1916) expressed quotients of certain q-series as polynomials of Eisenstein series of degree 2, 4, 6 and derived the famous Ramanujan's differential equations. We continue this research with the variants of Eisenstein-type series which Hahn (2007) recently introduced. We also prove new formulas of convolution sums for divisor sum functions as subsequent work of Cheng- Williams (2004) and Huard-Ou-Spearman-Williams (2002).

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