{ "id": "1901.10373", "version": "v1", "published": "2019-01-29T16:37:47.000Z", "updated": "2019-01-29T16:37:47.000Z", "title": "A Ramanujan-type formula for $ΞΆ^{2}(2m+1)$ and its generalizations", "authors": [ "Atul Dixit", "Rajat Gupta" ], "comment": "29 pages, submitted for publication", "categories": [ "math.NT", "math.CA" ], "abstract": "A Ramanujan-type formula involving the squares of odd zeta values is obtained. The crucial part in obtaining such a result is to conceive the correct analogue of the Eisenstein series involved in Ramanujan's formula for $\\zeta(2m+1)$. The formula for $\\zeta^{2}(2m+1)$ is then generalized in two different directions, one, by considering the generalized divisor function $\\sigma_z(n)$, and the other, by studying a more general analogue of the aforementioned Eisenstein series, consisting of one more parameter $N$. A number of important special cases are derived from the first generalization. For example, we obtain a series representation for $\\zeta(1+\\omega)\\zeta(-1-\\omega)$, where $\\omega$ is a non-trivial zero of $\\zeta(z)$. We also evaluate a series involving the modified Bessel function of the second kind in the form of a rational linear combination of $\\zeta(4k-1)$ and $\\zeta(4k+1)$ for $k\\in\\mathbb{N}$.", "revisions": [ { "version": "v1", "updated": "2019-01-29T16:37:47.000Z" } ], "analyses": { "subjects": [ "11M06", "11J81" ], "keywords": [ "ramanujan-type formula", "odd zeta values", "important special cases", "rational linear combination", "ramanujans formula" ], "note": { "typesetting": "TeX", "pages": 29, "language": "en", "license": "arXiv", "status": "editable" } } }