Cardinality Bounds for Hausdorff SDL Spaces

Gabriel Fernandes, João Marcelo Maciel Messias

We establish the cardinal inequality \(|X|\leq 2^{t(X)Hψ(X)}\) for every Hausdorff SDL space \(X\), where \(t(X)\) and \(Hψ(X)\) denote the tightness and the Hausdorff pseudocharac…