{ "id": "0909.4854", "version": "v1", "published": "2009-09-26T11:07:15.000Z", "updated": "2009-09-26T11:07:15.000Z", "title": "Multi-norms and modules over group algebras", "authors": [ "Paul Ramsden" ], "comment": "29 pages", "categories": [ "math.FA" ], "abstract": "Let G be a locally compact group, and let 1 < p < \\infty. In this paper we investigate the injectivity of the left L^1(G)-module L^p(G). We define a family of amenability type conditions called (p,q)-amenability, for any 1 <= p <= q. For a general locally compact group G we show if L^p(G) is injective, then G must be (p,p)-amenable. For a discrete group G we prove that l^p(G) is injective if and only if G is (p,p)-amenable.", "revisions": [ { "version": "v1", "updated": "2009-09-26T11:07:15.000Z" } ], "analyses": { "subjects": [ "46H25", "43A20" ], "keywords": [ "group algebras", "multi-norms", "general locally compact group", "amenability type conditions", "discrete group" ], "note": { "typesetting": "TeX", "pages": 29, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2009arXiv0909.4854R" } } }