{ "id": "math/9710204", "version": "v1", "published": "1997-10-15T00:00:00.000Z", "updated": "1997-10-15T00:00:00.000Z", "title": "Superreflexivity and J-convexity of Banach spaces", "authors": [ "Joerg Wenzel" ], "categories": [ "math.FA" ], "abstract": "A Banach space X is superreflexive if each Banach space Y that is finitely representable in X is reflexive. Superreflexivity is known to be equivalent to J-convexity and to the non-existence of uniformly bounded factorizations of the summation operators S_n through X. We give a quantitative formulation of this equivalence. This can in particular be used to find a factorization of S_n through X, given a factorization of S_N through [L_2,X], where N is `large' compared to n.", "revisions": [ { "version": "v1", "updated": "1997-10-15T00:00:00.000Z" } ], "analyses": { "subjects": [ "46B07", "46B10" ], "keywords": [ "banach space", "superreflexivity", "j-convexity", "summation operators" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "1997math.....10204W" } } }