{ "id": "1106.4133", "version": "v1", "published": "2011-06-21T08:39:57.000Z", "updated": "2011-06-21T08:39:57.000Z", "title": "Uniform covers at non-isolated points", "authors": [ "Fucai Lin", "Shou Lin" ], "comment": "12 pages", "journal": "Topology proceedings, 32(2008), 259-275", "categories": [ "math.GN" ], "abstract": "In this paper,\\ the authors define a space with an uniform base at non-isolated points, give some characterizations of images of metric spaces by boundary-compact maps, and study certain relationship among spaces with special base properties.\\ The main results are the following: (1)\\ $X$ is an open,\\ boundary-compact image of a metric space if and only if $X$ has an uniform base at non-isolated points; (2)\\ Each discretizable space of a space with an uniform base is an open compact and at most boundary-one image of a space with an uniform base; (3)\\ $X$ has a point-countable base if and only if $X$ is a bi-quotient,\\ at most boundary-one and countable-to-one image of a metric space.", "revisions": [ { "version": "v1", "updated": "2011-06-21T08:39:57.000Z" } ], "analyses": { "subjects": [ "54C10", "54D70", "54E30", "54E40" ], "keywords": [ "non-isolated points", "uniform base", "uniform covers", "metric space", "open compact" ], "tags": [ "journal article" ], "note": { "typesetting": "TeX", "pages": 12, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2011arXiv1106.4133L" } } }