{ "id": "1912.03635", "version": "v1", "published": "2019-12-08T08:01:54.000Z", "updated": "2019-12-08T08:01:54.000Z", "title": "Birkhoff-James orthogonality to a subspace of operators defined between Banach spaces", "authors": [ "Arpita Mal", "Kallol Paul" ], "comment": "8 Pages, Submitted to Journal of Operator Theory on 12th November, 2019", "categories": [ "math.FA" ], "abstract": "This paper deals with study of Birkhoff-James orthogonality of a linear operator to a subspace of operators defined between arbitrary Banach spaces. In case the domain space is reflexive and the subspace is finite dimensional we obtain a complete characterization. For arbitrary Banach spaces, we obtain the same under some additional conditions. For arbitrary Hilbert space $ \\mathbb{H},$ we also study orthogonality to subspace of the space of linear operators $L(\\mathbb{H}), $ both with respect to operator norm as well as numerical radius norm.", "revisions": [ { "version": "v1", "updated": "2019-12-08T08:01:54.000Z" } ], "analyses": { "subjects": [ "47L05", "46B20" ], "keywords": [ "birkhoff-james orthogonality", "arbitrary banach spaces", "linear operator", "arbitrary hilbert space", "paper deals" ], "note": { "typesetting": "TeX", "pages": 8, "language": "en", "license": "arXiv", "status": "editable" } } }