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Projective versions of the properties in the Scheepers Diagram
Published 13 Dec 2018 in math.GN | (1812.05925v2)
Abstract: Let $\mathcal{P}$ be a topological property. A.V. Arhangel'skii calls $X$ projectively $\mathcal{P}$ if every second countable continuous image of $X$ is $\mathcal{P}$. Lj.D.R. Ko$\check{c}$inac characterized the classical covering properties of Menger, Rothberger, Hurewicz and Gerlits-Nagy in term of continuous images in $\mathbb{R}{\omega}$. In this paper we study the functional characterizations of all projective versions of the selection properties in the Scheepers Diagram.
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