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Versions of Normality and Some Weak Forms of the Axiom of Choice |
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| Authors: | Paul Howard Kyriakos Keremedis Herman Rubin Jean E Rubin |
| Abstract: | We investigate the set theoretical strength of some properties of normality, including Urysohn's Lemma, Tietze-Urysohn Extension Theorem, normality of disjoint unions of normal spaces, and normality of Fσ subsets of normal spaces. |
| Keywords: | Axiom of Choice Normal space Urysohn's lemma Tietze-Urysohn extension theorem |