Abstract

We show that all maximal almost disjoint families have pseudocompact Vietoris hyperspace if and only if MAc(P(ω)/fin)\mathsf{MA}_\mathfrak c (\mathcal P(ω)/\mathrm{fin}) holds. We further study the question whether there is a maximal almost disjoint family whose hyperspace is pseudocompact and prove that consistently such families do not exist \emph{genericaly}, by constructing a consistent example of a maximal almost disjoint family A\mathcal A of size less than c\mathfrak c whose hyperspace is not pseudocompact.

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