• Medientyp: E-Artikel
  • Titel: Forcing and Stable Ordered-Union Ultrafilters
  • Beteiligte: Eisworth, Todd
  • Erschienen: The Association for Symbolic Logic, Inc., 2002
  • Erschienen in: The Journal of Symbolic Logic, 67 (2002) 1, Seite 449-464
  • Sprache: Englisch
  • ISSN: 0022-4812
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  • Anmerkungen:
  • Beschreibung: We investigate the effect of a variant of Matet forcing on ultrafilters in the ground model and give a characterization of those P-points that survive such forcing, answering a question left open by Blass [4]. We investigate the question of when this variant of Matet forcing can be used to diagonalize small filters without destroying P-points in the ground model. We also deal with the question of generic existence of stable ordered-union ultrafilters.