English

$\mathfrak{c}$-many types of a $\Psi$-space

General Topology 2018-06-04 v1

Abstract

We show that for any cardinal ω<κc\omega<\kappa \leq \mathfrak{c} with cf(κ)>ωcf(\kappa) > \omega, there are c\mathfrak{c} many AD families whose Ψ\Psi-spaces are pairwise non-homeomorphic and they can be Luzin families or branch families of 2ω2^\omega.

Cite

@article{arxiv.1806.00106,
  title  = {$\mathfrak{c}$-many types of a $\Psi$-space},
  author = {Hector Alonzo Barriga-Acosta and Fernando Hernández-Hernández},
  journal= {arXiv preprint arXiv:1806.00106},
  year   = {2018}
}

Comments

6 pages

R2 v1 2026-06-23T02:15:25.903Z