A few special ordinal ultrafilters

Journal of Symbolic Logic 61 (3):920-927 (1996)
Abstract
We prove various results on the notion of ordinal ultrafilters introduced by J. Baumgartner. In particular, we show that this notion of ultrafilter complexity is independent of the more familiar Rudin-Keisler ordering
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DOI 10.2307/2275792
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References found in this work BETA

Ultrafilters on a Countable Set.David Booth - 1970 - Annals of Mathematical Logic 2 (1):1-24.
Forcing with Filters and Complete Combinatorics.Claude Laflamme - 1989 - Annals of Pure and Applied Logic 42 (2):125-163.

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Citations of this work BETA

Cascades, Order, and Ultrafilters.Andrzej Starosolski - 2014 - Annals of Pure and Applied Logic 165 (10):1626-1638.

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