English

Cardinal invariants related to density

Logic 2025-11-05 v1

Abstract

We investigate some variants of the splitting, reaping, and independence numbers defined using asymptotic density. Specifically, we give a proof of Con(i<s1/2\mathfrak{i}<\mathfrak{s}_{1/2}), Con(r1/2<b\mathfrak{r}_{1/2}<\mathfrak{b}) and Con(i<20\mathfrak{i}_*<2^{\aleph_0}). This answers two questions raised in arXiv:1808.02442v3. Besides, we prove the consistency of s1/2<\mathfrak{s}_{1/2}^{\infty} < non(E)(\mathcal{E}) and cov(E)<r1/2(\mathcal{E}) < \mathfrak{r}_{1/2}^{\infty}, where E\mathcal{E} is the σ\sigma-ideal generated by closed sets of measure zero.

Keywords

Cite

@article{arxiv.2401.09649,
  title  = {Cardinal invariants related to density},
  author = {David Valderrama},
  journal= {arXiv preprint arXiv:2401.09649},
  year   = {2025}
}

Comments

21 pages, 3 figures

R2 v1 2026-06-28T14:19:55.106Z