Topology Atlas
Document # paca-14
Arhangel'ski's theorem, a proof
Henno Brandsma
a note in Topology Explained
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We prove Arhangel'ski's theorem:
If X is a Lindelöf, Hausdorff and first countable space then
|X| <= \mathfrakc.
We mention some generalizations.
Date: November 15, 2003
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