Abstract
We study Vietoris hyperspaces of closed and final sets of Priestley spaces. We are particularly interested in Skula topologies. A topological space is 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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Dedicated to the memory of Matatyahu Rubin (1946–2017)
Partially supported by NCN grant DEC-2012/07/D/ST1/02087 (The National Science Center, Poland).
Supported by the Institute of Mathematics, Czech Academy of Sciences.
Supported by the GA ČR grant 20-22230L (Czech Science Foundation).
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Banakh, T., Bonnet, R. & Kubiś, W. Vietoris hyperspaces over scattered Priestley spaces. Isr. J. Math. 249, 37–81 (2022). https://doi.org/10.1007/s11856-022-2307-5
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DOI: https://doi.org/10.1007/s11856-022-2307-5