超空间选择避免点

IF 0.2 Q4 MATHEMATICS
V. Gutev
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引用次数: 0

摘要

本文讨论了连通空间中的一个超空间选择问题。我们给出了这个问题的两个解,说明了非空闭集和至多两点集的选择之间的区别。在第一种情况下,我们得到了紧致可序空间的一个刻画。在后一种情况下——对于至多两点集的选择,相同的选择性质等价于空间上三元关系的存在,称为循环序,并给出了所谓的弱循环序空间的特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hyperspace selections avoiding points
In this paper, we deal with a hyperspace selection problem in the setting of connected spaces. We present two solutions of this problem illustrating the difference between selections for the nonempty closed sets, and those for the at most two-point sets. In the first case, we obtain a characterisation of compact orderable spaces. In the latter case -- that of selections for at most two-point sets, the same selection property is equivalent to the existence of a ternary relation on the space, known as a cyclic order, and gives a characterisation of the so called weakly cyclically orderable spaces.
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来源期刊
CiteScore
0.60
自引率
0.00%
发文量
19
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