Orderability in the presence of local compactness (Q945888)
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scientific article; zbMATH DE number 5345238
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Orderability in the presence of local compactness |
scientific article; zbMATH DE number 5345238 |
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Orderability in the presence of local compactness (English)
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18 September 2008
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All spaces considered are at least Hausdorff. The article is motivated by results discussed in [\textit{J. van Mill} and \textit{E. Wattel}, Proc. Am. Math. Soc. 83, 601-605 (1981; Zbl 0473.54010)]. It is shown that a locally compact paracompact space has a continuous selection for its Vietoris hyperspace of nonempty closed subsets if and only if it is a topologically well-orderable subspace of some orderable space. The author also proves that a locally compact paracompact space is suborderable if and only if it has a continuous weak selection. His investigations show that every locally compact paracompact space which has a continuous weak selection is semi-orderable, that is, is the topological sum of two orderable spaces.
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Vietoris hyperspace
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continuous selection
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weak selection
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orderable space
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semi-orderable space
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suborderable space
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topologically well-orderable subspace
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