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Ordinal invariants in topology. I: On two questions of Arhangel’skii and Franklin. (English) Zbl 0321.54014


MSC:

54D50 \(k\)-spaces
54B17 Adjunction spaces and similar constructions in general topology
54B05 Subspaces in general topology
54D55 Sequential spaces
54G99 Peculiar topological spaces
54H99 Connections of general topology with other structures, applications
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