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First Countable Lindelöf Extensions of Uncountable Discrete Spaces
Published online by Cambridge University Press: 20 November 2018
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The existence of a first countable Lindelöf extension L of an uncountable discrete space D for which L-D is countable is considered. Assuming CH, such extensions exist; however it is also consistent that no such spaces exist, as follows from MA + ¬ CH
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- Copyright © Canadian Mathematical Society 1980
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