Spaces of continuous characteristic functions
Raushan Z. Buzyakova (2006)
Commentationes Mathematicae Universitatis Carolinae
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We show that if is first-countable, of countable extent, and a subspace of some ordinal, then is Lindelöf.
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Spaces of continuous characteristic functions
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In this expository paper it is shown that Martin's Axiom and the negation of the Continuum Hypothesis imply that the product of ccc spaces is a ccc space. The Continuum Hypothesis is then used to construct the Laver-Gavin example of two ccc spaces whose product is not a ccc space.
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