Abstract
We deal with some natural properties of ultrafilters which trivially fail for normal ultrafilters.
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The work was partially supported by Israel Science Foundation Grant No. 58/14. We are grateful to Eilon Bilinski who drew our attention to the subject, to Tom Benhamou and Eyal Kaplan for stimulating questions and discussions and to the referee of the paper for his corrections and suggestions.
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Gitik, M. Strange ultrafilters. Arch. Math. Logic 58, 35–52 (2019). https://doi.org/10.1007/s00153-018-0620-9
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DOI: https://doi.org/10.1007/s00153-018-0620-9