English

Slender Trees and the Approximation Property

Logic 2025-08-15 v2

Abstract

We obtain a relatively simple criterion for when a forcing has the <δ{<}\,\delta-approximation property, generalizing a result of Unger. Afterwards we apply this criterion to construct variants of Mitchell Forcing in order to answer questions posed by Mohammadpour.

Keywords

Cite

@article{arxiv.2401.13446,
  title  = {Slender Trees and the Approximation Property},
  author = {Hannes Jakob},
  journal= {arXiv preprint arXiv:2401.13446},
  year   = {2025}
}

Comments

28 pages, 0 figures

R2 v1 2026-06-28T14:25:48.854Z