Article ID Journal Published Year Pages File Type
4660453 Topology and its Applications 2009 5 Pages PDF
Abstract

In this note, we show that if X is the union of a finite collection of weak -refinable subspaces and e(X)=ω, then X is a Lindelöf space. We also show that the product of two ordinals is dually discrete. The last conclusion gives a positive answer to a question of Alas, Junqueira and Wilson.

Related Topics
Physical Sciences and Engineering Mathematics Geometry and Topology