{ "id": "2102.12207", "version": "v1", "published": "2021-02-24T11:06:53.000Z", "updated": "2021-02-24T11:06:53.000Z", "title": "The weak compactification of locally compact groups", "authors": [ "María V. Ferrer", "Salvador Hernández" ], "comment": "arXiv admin note: text overlap with arXiv:1704.03438", "categories": [ "math.GN", "math.FA" ], "abstract": "We further investigate the weak topology generated by the irreducible unitary representations of a group $G$. A deep result due to Ernest \\cite{Ernest1971} and Hughes \\cite{Hughes1973} asserts that every weakly compact subset of a locally compact (LC) group $G$ is compact in the LC-topology, generalizing thereby a previous result of Glicksberg \\cite{glicks1962} for abelian locally compact (LCA) groups. Here, we first survey some recent findings on the weak topology and establish some new results about the preservation of several compact-like properties when going from the weak topology to the original topology of LC groups. Among others, we deal with the preservation of countably compactness, pseudocompactness and functional boundedness.", "revisions": [ { "version": "v1", "updated": "2021-02-24T11:06:53.000Z" } ], "analyses": { "keywords": [ "locally compact groups", "weak compactification", "weak topology", "irreducible unitary representations", "weakly compact subset" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }