English

A small ultrafilter number at all $\aleph_3\leq\kappa<\aleph_\omega$

Logic 2025-08-13 v2

Abstract

This note shows how recent work of Eskew and Hayut can be combined with a method of Raghavan and Shelah to show the consistency of uκ<2κ\mathfrak u_\kappa<2^\kappa for 3κ<ω\aleph_3\leq \kappa<\aleph_{\omega}, from a huge cardinal.

Keywords

Cite

@article{arxiv.2508.07456,
  title  = {A small ultrafilter number at all $\aleph_3\leq\kappa<\aleph_\omega$},
  author = {Julian Eshkol},
  journal= {arXiv preprint arXiv:2508.07456},
  year   = {2025}
}

Comments

Major error in lemma 6. The main result is incorrect