Variations of selective separability
نویسندگان
چکیده
منابع مشابه
On some questions about selective separability
Let A and B be given families of subsets of some set S. Then the following symbols denote the corresponding statements for the pair A,B: 1. S1(A,B): For each sequence (Om : m < ∞) of elements of A there is a sequence (Tm : m < ∞) such that each Tm belongs to Om, and {Tm : m < ∞} ∈ B. 2. Sfin(A,B): For each sequence (Om : m < ∞) of elements of A there is a sequence (Tm : m < ∞) such that each Tm...
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ژورنال
عنوان ژورنال: Topology and its Applications
سال: 2009
ISSN: 0166-8641
DOI: 10.1016/j.topol.2008.12.029