Selection principles related to $α_i$-properties
Ljubiša D. R. Kočinac · arXiv (Cornell University) · 2006
We investigate selection principles which are motivated by Arhangel'skiǐ's $α_i$-properties, $i=1,2,3,4$, and their relations with classical selection principles. It will be shown that they are closely related to the selection principle $\sone$ and often are equivalent to it.