{ "id": "1512.08691", "version": "v1", "published": "2015-12-29T14:27:16.000Z", "updated": "2015-12-29T14:27:16.000Z", "title": "Correspondences between model theory and banach space theory", "authors": [ "Karim Khanaki" ], "comment": "arXiv admin note: substantial text overlap with arXiv:1509.03193", "categories": [ "math.LO", "math.FA" ], "abstract": "In \\cite{K3} we pointed out the correspondence between a result of Shelah in model theory, i.e. a theory is unstable if and only if it has IP or SOP, and the well known compactness theorem of Eberlein and \\v{S}mulian in functional analysis. In this paper, we relate a {\\em natural} Banach space $V$ to a formula $\\phi(x,y)$, and show that $\\phi$ is stable (resp NIP, NSOP) if and only if $V$ is reflexive (resp Rosenthal, weakly sequentially complete) Banach space. Also, we present a proof of the Eberlein-\\v{S}mulian theorem by a model theoretic approach using Ramsey theorems which is illustrative to show some correspondences between model theory and Banach space theory.", "revisions": [ { "version": "v1", "updated": "2015-12-29T14:27:16.000Z" } ], "analyses": { "subjects": [ "03C45", "46E15", "46B50" ], "keywords": [ "banach space theory", "model theory", "correspondence", "model theoretic approach", "resp rosenthal" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2015arXiv151208691K" } } }