Note on hit-and-miss topologies |
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Authors: | László Zsilinszky |
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Affiliation: | (1) Department of Mathematics and Computer Science, University of North Carolina at Pembroke, 28372 Pembroke, NC, USA |
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Abstract: | ![]() This is a continuation of [19]. We characterize first and second countability of the general hit-and-miss hyperspace topologyτ + Δ for weakly-R 0 base spaces. Further, metrizability ofτ + Δ is characterized with no preliminary conditions on the base space and the generating family of closed sets and a new proof on uniformizability (i.e. complete regularity) ofτ + Δ is given in this general setting, thus generalizing results of [3], [5] and [6]. |
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Keywords: | 1991 Mathematics Subject Classification 54B20 Secondary 54D15 54E35 |
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