English

Controlling classical cardinal characteristics while collapsing cardinals

Logic 2020-06-19 v2

Abstract

Given a forcing notion PP that forces certain values to several classical cardinal characteristics of the reals, we show how we can compose PP with a collapse (of a cardinal λ>κ\lambda>\kappa to κ\kappa) such that the composition still forces the previous values to these characteristics. We also show how to force distinct values to m\mathfrak m, p\mathfrak p and h\mathfrak h and also keeping all the values in Cicho\'n's diagram distint, using the Boolean Ultrapower method of arXiv:1708.03691 . (In arXiv:2006.09826 , the same was done for the newer Cicho\'n's Maximum construction, which avoids large cardinals.)

Keywords

Cite

@article{arxiv.1904.02617,
  title  = {Controlling classical cardinal characteristics while collapsing cardinals},
  author = {Martin Goldstern and Jakob Kellner and Diego A. Mejía and Saharon Shelah},
  journal= {arXiv preprint arXiv:1904.02617},
  year   = {2020}
}

Comments

Compared to the previous version arXiv:1904.02617v1 , parts have been removed that are included in arXiv:2006.09826 (a construction for 13 characteristics based on the Cichon's maximum construction without large cardinals, arXiv:1906.06608)

R2 v1 2026-06-23T08:29:27.653Z