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Distinguishing types of gaps in (ω)/fin
Published online by Cambridge University Press: 12 March 2014
Abstract
Supplementing the well known results of Kunen we show that Martin's Axiom is not sufficient to decide the existence of (ω1, ϲ)-gaps when (ϲ, ϲ)-gaps exist, that is, it is consistent with ZFC that Martin's Axiom holds and there are (ϲ, ϲ)-gaps but no (ω1, ϲ)-gaps.
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- Research Article
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- Copyright © Association for Symbolic Logic 2003
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