Selective separability on spaces with an analytic topology
We study two form of selective selective separability, $SS$ and $SS^+$, on countable spaces with an analytic topology. We show several Ramsey type properties which imply $SS$. For analytic spaces $X$, $SS^+$ is equivalent to have that the collection of dense sets is a $G_δ$ subset of $2^X$, and also equivalent to the existence of a weak base which is an $F_σ$-subset of $2^X$. We study several examples of analytic spaces.
math.GN↗