{ "id": "1407.2397", "version": "v2", "published": "2014-07-09T09:16:52.000Z", "updated": "2014-08-17T12:34:52.000Z", "title": "Elementary methods for incidence problems in finite fields", "authors": [ "Javier Cilleruelo", "Alex Iosevich", "Ben Lund", "Oliver Roche-Newton", "Misha Rudnev" ], "comment": "9 pages. In this new version, Theorem 3 has been significantly improved, whilst the proof has been simplified. Also, Ben Lund has been added as an author", "categories": [ "math.CO" ], "abstract": "We use elementary methods to prove an incidence theorem for points and spheres in $\\mathbb{F}_q^n$. As an application, we show that any point set of $P\\subset \\mathbb{F}_q^2$ with $|P|\\geq 5q$ determines a positive proportion of all circles. The latter result is an analogue of Beck's Theorem for circles which is optimal up to multiplicative constants.", "revisions": [ { "version": "v2", "updated": "2014-08-17T12:34:52.000Z" } ], "analyses": { "subjects": [ "52C10" ], "keywords": [ "elementary methods", "incidence problems", "finite fields", "incidence theorem", "becks theorem" ], "note": { "typesetting": "TeX", "pages": 9, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2014arXiv1407.2397C" } } }