English

Cicho\'n's maximum without large cardinals

Logic 2020-04-27 v2

Abstract

Cicho\'n's diagram lists twelve cardinal characteristics (and the provable inequalities between them) associated with the ideals of null sets, meager sets, countable sets, and σ\sigma-compact subsets of the irrationals. It is consistent that all entries of Cicho\'n's diagram are pairwise different (apart from add(M)\textrm{add}(\mathcal{M}) and cof(M)\textrm{cof}(\mathcal{M}), which are provably equal to other entries). However, the consistency proofs so far required large cardinal assumptions. In this work, we show the consistency without such assumptions.

Keywords

Cite

@article{arxiv.1906.06608,
  title  = {Cicho\'n's maximum without large cardinals},
  author = {Martin Goldstern and Jakob Kellner and Diego A. Mejía and Saharon Shelah},
  journal= {arXiv preprint arXiv:1906.06608},
  year   = {2020}
}

Comments

Minor corrections. Remove "logical dependency" on arxiv:1904.02617 (Everything claimed about $\aleph_1<\mathfrak m<\mathfrak p<\mathfrak h<\textrm{add}(\mathcal{N})$ in the previous version is correct, but it is better proved in arxiv:1904.02617, bulding on this paper, than the other way round.)

R2 v1 2026-06-23T09:54:42.167Z