{ "id": "2004.12122", "version": "v1", "published": "2020-04-25T12:23:11.000Z", "updated": "2020-04-25T12:23:11.000Z", "title": "On some congruences using multiple harmonic sums of length three and four", "authors": [ "Walid Kehila" ], "comment": "8 pages", "categories": [ "math.NT", "math.CO" ], "abstract": "In the present paper, we determine the sums $\\sum_{j=1}^{p-1}\\frac{H_j^{(s_1)}H_j^{(s_3)}}{j^{s_2}}$ and $\\sum_{j=1}^{p-1}\\frac{H_j^{(s_1)}H_j^{(s_3)}H_j^{(s_4)}}{j^{s_2}}$ modulo $p$ and modulo $p^2$ in certain cases. This is done by using multiple harmonic sums of length three and four, as well as, many other results. In addition, We recover three congruences conjectured by Z.-W Sun and solved later by the author himself and R. Me\\v{s}trovi\\'c.", "revisions": [ { "version": "v1", "updated": "2020-04-25T12:23:11.000Z" } ], "analyses": { "subjects": [ "11A07", "11B68", "11B50", "11B83" ], "keywords": [ "multiple harmonic sums", "congruences", "author himself" ], "note": { "typesetting": "TeX", "pages": 8, "language": "en", "license": "arXiv", "status": "editable" } } }