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SLOW P-POINT ULTRAFILTERS
Published online by Cambridge University Press: 26 November 2019
Abstract
We answer a question of Blass, Di Nasso, and Forti [2, 7] by proving, assuming Continuum Hypothesis or Martin’s Axiom, that (1) there exists a P-point which is not interval-to-one and (2) there exists an interval-to-one P-point which is neither quasi-selective nor weakly Ramsey.
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- Copyright © The Association for Symbolic Logic 2019
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