Comparing weak versions of separability
  Our aim is to investigate spaces with sigma-discrete and meager dense sets, as well as selective versions of these properties. We construct numerous examples to point out the differences between these classes while answering questions of Tkachuk [30], Hutchinson [17] and the authors of [8]. 
Daniel T. Soukup, Lajos Soukup, Santi Spadaro
math.GN