Tightness and π-character in centered spaces
نویسندگان
چکیده
منابع مشابه
Topology Proceedings TIGHTNESS IN σ-COMPACT SPACES
In 1993 Arhangelskii and Stavrova de ned the notion of the k-tightness number of a space and its hereditary version. They proved that the hereditary k-tightness of a compact space is equal to the standard notion of tightness. Out of this grew the notion of what one might call σ-compact tightness: the closure of a set is the union of the closures of all its σ-compact subsets. We contribute to th...
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ژورنال
عنوان ژورنال: Colloquium Mathematicum
سال: 1999
ISSN: 0010-1354,1730-6302
DOI: 10.4064/cm-80-2-297-307