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math.GN2021
Submaximal spaces and cardinal invariants
César Corral
We give a combinatorial characterization of countable submaximal subspaces of . Using a parametrized version of Mathias forcing, we prove that there exists a countable submaxi…
math.GN2021
Madness and (weak) normality
César Corral
We consider weakenings of normality in -spaces and prove that the existence of a MAD family whose -space is almost-normal is independent of \textsf{ZFC}. We also construct a…