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arXiv 2007.12890math.GNmath.LO
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离散Priestley空间的Vietoris超空间

Vietoris hyperspaces of scattered Priestley spaces

T. Banakh, R. Bonnet, W. Kubiś

摘要:

研究了Priestley空间的闭集和闭终集的Vietoris超空间。我们对Skula拓扑结构特别感兴趣。一个拓扑空间是\emph{Skula},如果它的拓扑是由另一个拓扑的开集的差生成的。紧Skula空间是散布的,而且具有与拓扑相容的自然良基序,即它是Priestley空间。我们的主要目标之一是研究一般Priestley空间的Vietoris超空间,解决当它们的拓扑是Skula时的问题,并计算相关的序秩。我们将我们的结果应用到基于某些几乎不相交族的离散紧空间,特别是Lusin族和梯形系。

英文摘要:

We study Vietoris hyperspaces of closed and closed final sets of Priestley spaces. We are particularly interested in Skula topologies. A topological space is \emph{Skula} if its topology is generated by differences of open sets of another topology. A compact Skula space is scattered and moreover has a natural well-founded ordering compatible with the topology, namely, it is a Priestley space. One of our main objectives is investigating Vietoris hyperspaces of general Priestley spaces, addressing the question when their topologies are Skula and computing the associated ordinal ranks. We apply our results to scattered compact spaces based on certain almost disjoint families, in particular, Lusin families and ladder systems.

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