Rapid interval P-points

Jialiang He, Renling Jin, Shuguo Zhang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


In this paper a rapid non-interval P-point and a rapid non-weakly Ramsey interval P-point are constructed assuming Continuum Hypothesis or Martin's Axiom. These constructions, with the help of geometric interpretations for some needed configurations, provide the examples of rapid ultrafilters for an affirmative answer to a question of Blass, Di Nasso, and Forti.

Original languageEnglish
Article number107333
JournalTopology and its Applications
StatePublished - 1 Sep 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020 Elsevier B.V.


  • Interval P-point
  • P-point
  • Quasi-selective ultrafilter
  • Rapid ultrafilter
  • Selective ultrafilter
  • Weakly Ramsey ultrafilter


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