It is proved that, under the Martin's Axiom, every $T_1$-space with countable tightness is a subspace of some pseudo-radial space. We also give several characterizations of subspaces of pseudo-radial spaces and conclude that being a subspace of a pseudo-radial space is a local property.
@article{118615, author = {Jin Yuan Zhou}, title = {On subspaces of pseudo-radial spaces}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {34}, year = {1993}, pages = {583-586}, zbl = {0796.54011}, mrnumber = {1243090}, language = {en}, url = {http://dml.mathdoc.fr/item/118615} }
Zhou, Jin Yuan. On subspaces of pseudo-radial spaces. Commentationes Mathematicae Universitatis Carolinae, Tome 34 (1993) pp. 583-586. http://gdmltest.u-ga.fr/item/118615/
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