A characterization of the Menger property by means of ultrafilter convergence
arXiv:1210.2118 · doi:10.1016/j.topol.2013.07.044
Abstract
We characterize various Menger/Rothberger related properties by means of ultrafilter convergence, and discuss their behavior with respect to products.
arXiv commentv.2; 13 pages, some improvements, some corrections, added introduction and divided into sections