{ "id": "1910.13183", "version": "v1", "published": "2019-10-29T10:35:05.000Z", "updated": "2019-10-29T10:35:05.000Z", "title": "Orlicz spaces associated to a quasi-Banach function space. Applications to vector measures and interpolation", "authors": [ "Ricardo del Campo", "Antonio Fernández", "Fernando Mayoral", "Francisco Naranjo" ], "categories": [ "math.FA" ], "abstract": "We characterize the relatively compact subsets of $L^1\\left(\\| m \\| \\right),$ the quasi-Banach function space associated to the semivariation of a given vector measure $m$ showing that the strong connection between compactness, uniform absolute continuity, uniform integrability, almost order boundedness and L-weak compactness that appears in the classic setting of Lebesgue spaces remains almost invariant in this new context of the Choquet integration. Also we present a de la Vall\\'ee-Poussin type theorem in the context of these spaces $L^1\\left(\\|m\\|\\right)$ that allows us to locate each compact subset of $L^1\\left(\\|m\\|\\right)$ as a compact subset of a smaller quasi-Banach Orlicz space $L^\\Phi\\left(\\|m\\|\\right)$ associated to the semivariation of the measure $m.$", "revisions": [ { "version": "v1", "updated": "2019-10-29T10:35:05.000Z" } ], "analyses": { "subjects": [ "46E30", "46G10" ], "keywords": [ "quasi-banach function space", "vector measure", "compact subset", "smaller quasi-banach orlicz space", "applications" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }