H. Barriga-Acosta

collaborators

2 papers

math.GN2023

On Roitman's principles $MH$ and $Δ$

Hector Barriga-Acosta, Will Brian, Alan Dow

The Model Hypothesis (abbreviated $MH$ ) and $Δ$ are set-theoretic axioms introduced by J. Roitman in her work on the box product problem. Answering some questions of Roitm…

math.GN2018

$c$ -many types of a $Ψ$ -space

Hector Alonzo Barriga-Acosta, Fernando Hernández-Hernández

We show that for any cardinal $ω < κ \leq c$ with $c f (κ) > ω$ , there are $c$ many AD families whose $Ψ$ -spaces are pairwise non-homeomorphic and they can be Luzi…

On Roitman's principles MH and Δ

c-many types of a Ψ-space

On Roitman's principles $MH$ and $Δ$

$c$ -many types of a $Ψ$ -space