Densely continuous forms in Vietoris hyperspaces

被引:5
|
作者
McCoy, RA [1 ]
机构
[1] Virginia Tech, Dept Math, Blacksburg, VA 24061 USA
来源
SET-VALUED ANALYSIS | 2000年 / 8卷 / 03期
关键词
densely continuous forms; Vietoris hyperspaces; semicontinuous functions; countably paracompact normal spaces; locally compact separable metric spaces;
D O I
10.1023/A:1008773312587
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
For countably paracompact normal spaces X and locally compact separable metric spaces Y, a characterization is given for the closure of the set of densely continuous forms from X to Y in the hyperspace of nonempty closed subsets of X x Y under the Vietoris topology. This shows that for such X having no isolated points, every closed subset of X x R that is dense over X can be 'Vietoris approximated' by a semicontinuous function on X.
引用
收藏
页码:267 / 271
页数:5
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