A characterization of 2-square ultrafilters

Journal of Symbolic Logic 48 (2):409-414 (1983)
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Abstract

The class of 2-square ultrafilters on ω equals the union, for n ≥ 1, of the classes of strictly n Ramsey ultrafilters on ω

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10.2307/2273558

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References found in this work

Ultrafilters on a countable set.David Booth - 1970 - Annals of Mathematical Logic 2 (1):1.
Ultrafilters over a measurable cardinal.A. Kanamori - 1976 - Annals of Mathematical Logic 10 (3-4):315-356.

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