Abstract
We show that in the models of 𝔲 < 𝔡 from [14] there are infinitely many near-coherence classes of ultrafilters, thus answering Banakh’s and Blass’ Question 30 of [3] negatively. By an unpublished result of Canjar, there are at least two classes in these models.
Citation
Heike Mildenberger. "There may be infinitely many near-coherence classes under 𝔲 < 𝔡." J. Symbolic Logic 72 (4) 1228 - 1238, December 2007. https://doi.org/10.2178/jsl/1203350784
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