English

Forcing "$\mathrm{NS}_{\omega_1}$ is $\omega_1$-dense" From Large Cardinals

Logic 2024-03-15 v1

Abstract

We answer a question of Woodin by showing that assuming an inaccessible cardinal κ\kappa which is a limit of <κ{<}\kappa-supercompact cardinals exists, there is a stationary set preserving forcing P\mathbb{P} so that VPNSω1 is ω1-dense"V^{\mathbb P}\models``\mathrm{NS}_{\omega_1}\text{ is }\omega_1\text{-dense}". We also introduce a new forcing axiom QM\mathrm{QM}, show it is consistent assuming a supercompact limit of supercompact cardinals and prove that it implies Qmax-()\mathbb{Q}_{\mathrm{max}}\text{-}(*). Consequently, QM\mathrm{QM} implies ``NSω1\mathrm{NS}_{\omega_1} is ω1\omega_1-dense".

Keywords

Cite

@article{arxiv.2403.09020,
  title  = {Forcing "$\mathrm{NS}_{\omega_1}$ is $\omega_1$-dense" From Large Cardinals},
  author = {Andreas Lietz},
  journal= {arXiv preprint arXiv:2403.09020},
  year   = {2024}
}