{ "id": "2308.06800", "version": "v1", "published": "2023-08-13T15:54:52.000Z", "updated": "2023-08-13T15:54:52.000Z", "title": "Some q-Identities derived by the ordinary derivative operator", "authors": [ "Jin Wang", "Ruiqi Ruan", "Xinrong Ma" ], "comment": "22 pages", "categories": [ "math.CO" ], "abstract": "In this paper, we investigate applications of the ordinary derivative operator, instead of the $q$-derivative operator, to the theory of $q$-series. As main results, many new summation and transformation formulas are established which are closely related to some well-known formulas such as the $q$-binomial theorem, Ramanujan's ${}_1\\psi_1$ formula, the quintuple product identity, Gasper's $q$-Clausen product formula, and Rogers' ${}_6\\phi_5$ formula, etc. Among these results is a finite form of the Rogers-Ramanujan identity and a short way to Eisenstein's theorem on Lambert series.", "revisions": [ { "version": "v1", "updated": "2023-08-13T15:54:52.000Z" } ], "analyses": { "subjects": [ "05A30", "33D15" ], "keywords": [ "ordinary derivative operator", "q-identities", "clausen product formula", "quintuple product identity", "finite form" ], "note": { "typesetting": "TeX", "pages": 22, "language": "en", "license": "arXiv", "status": "editable" } } }