Unions and the axiom of choice
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Omar De la Cruz; Eric J. Hall; Paul Howard; Kyriakos Keremedis; Jean E. Rubin
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Article
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2008
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John Wiley and Sons
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English
β 176 KB
π 1 views
## Abstract We study statements about countable and wellβordered unions and their relation to each other and to countable and wellβordered forms of the axiom of choice. Using WO as an abbreviation for βwellβorderableβ, here are two typical results: The assertion that every WO family of countable se