arXiv · math/9501208
A few special ordinal ultrafilters
Abstract
We prove various results on the notion of ordinal ultrafiters 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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Claude Laflamme. 1995-01-26. A few special ordinal ultrafilters. https://arxiv.org/abs/math/9501208
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