Abstract
If there arek ++ eventually functions fromk + intok or if there arek ++ eventually different functions fromk + then uniform ultrafilters onk + are (k, k +)-regular.
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The research of the first author was supported in part by NSF grant.
The second author is a Miller’s Fellow at the University of California in Berkeley.
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Benda, M., Ketonen, J. Regularity of ultrafilters. Israel J. Math. 17, 231–240 (1974). https://doi.org/10.1007/BF02756872
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DOI: https://doi.org/10.1007/BF02756872