English

The strong Prikry property

Logic 2017-07-24 v1

Abstract

I isolate a combinatorial property of a poset P\mathbb{P} that I call the strong Prikry property, which implies the existence of an ultrafilter on the complete Boolean algebra B\mathbb{B} of P\mathbb{P} such that one inclusion of the Boolean ultrapower version of the so-called \Bukovsky-Dehornoy phenomenon holds with respect to B\mathbb{B} and UU. I show that in all cases that were previously studied, and for which it was shown that they come with a canonical iterated ultrapower construction whose limit can be described as a single Boolean ultrapower, the posets in question satisfy this property: Prikry forcing, Magidor forcing and generalized Prikry forcing.

Keywords

Cite

@article{arxiv.1707.06705,
  title  = {The strong Prikry property},
  author = {Gunter Fuchs},
  journal= {arXiv preprint arXiv:1707.06705},
  year   = {2017}
}
R2 v1 2026-06-22T20:53:26.601Z