Title of article :
Fréchet–Urysohn for finite sets
Author/Authors :
Gruenhage، نويسنده , , Gary and Szeptycki، نويسنده , , Paul J.، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 2005
Abstract :
E. Reznichenko and O. Sipacheva called a space X “Fréchet–Urysohn for finite sets” if the following holds for each point x ∈ X : whenever P is a collection of finite subsets of X such that every neighborhood of x contains a member of P, then P contains a subfamily that converges to x. We continue their study of this property. We also look at analogous notions obtained by restricting to collections P of bounded size, we discuss connections with topological groups, the α i -properties of A.V. Arhangelʹskii, and with a certain topological game.
Keywords :
?-network , ? i -spaces , Fréchet–Urysohn
Journal title :
Topology and its Applications
Journal title :
Topology and its Applications