Abstract
An earlier paper [Starosolski A., P-hierarchy on βω, J. Symbolic Logic, 2008, 73(4), 1202-1214] investigated the relations between ordinal ultrafilters and the so-called P-hierarchy. The present paper focuses on the aspects of characterization of classes of ultrafilters of finite index, existence, generic existence and the Rudin-Keisler-order.
| Original language | English |
|---|---|
| Pages (from-to) | 84-96 |
| Number of pages | 13 |
| Journal | Central European Journal of Mathematics |
| Volume | 12 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 2014 |
Keywords
- (Relatively) RK-minimal points
- Monotone sequential contour
- Ordinal ultrafilters
- P-hierarchy
- P-points
ASJC Scopus subject areas
- General Mathematics
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