{ "id": "1509.04757", "version": "v1", "published": "2015-09-15T22:07:08.000Z", "updated": "2015-09-15T22:07:08.000Z", "title": "Representations of integers by systems of three quadratic forms", "authors": [ "Lillian B. Pierce", "Damaris Schindler", "Melanie Matchett Wood" ], "comment": "66 pages", "categories": [ "math.NT" ], "abstract": "It is classically known that the circle method produces an asymptotic for the number of representations of a tuple of integers $(n_1,\\ldots,n_R)$ by a system of quadratic forms $Q_1,\\ldots, Q_R$ in $k$ variables, as long as $k$ is sufficiently large; reducing the required number of variables remains a significant open problem. In this work, we consider the case of 3 forms and improve on the classical result by reducing the number of required variables to $k \\geq 10$ for \"almost all\" tuples, under appropriate nonsingularity assumptions on the forms $Q_1,Q_2,Q_3$. To accomplish this, we develop a three-dimensional analogue of Kloosterman's circle method, in particular capitalizing on geometric properties of appropriate systems of three quadratic forms.", "revisions": [ { "version": "v1", "updated": "2015-09-15T22:07:08.000Z" } ], "analyses": { "keywords": [ "quadratic forms", "representations", "circle method produces", "appropriate nonsingularity assumptions", "kloostermans circle method" ], "note": { "typesetting": "TeX", "pages": 66, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2015arXiv150904757P" } } }