2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/77391The density topology $\cal T$ is a topology on the real line, finer than the usual topology, having as its open sets the measurable subsets of ${\mathbb R}$, which are of density 1 at each of their points. The aim of this paper is to determine which subsets of the density topology are semi-stratifiable, orthocompact and weakly hereditarily pseudocompact.8 pagesGeneral TopologyClassical Analysis and ODEs28A05; 54G20; 54-02; 03E15; 04A15; 54A10text