The decomposable and the ambiguous sets

We prove that every ambiguous subset of a hereditarily Bairespace is decomposable. We obtain that a decomposable set$Asubseteq X$ is ambiguous when (i) $X$ is a perfectlyparacompact space, or (ii) $A$ and $Xsetminus A$ are Lindel"{o}fand $X$ is a completely regular space.

Bibliographic Details
Main Author: O. Karlova
Format: Article
Language:English
Published: Vasyl Stefanyk Precarpathian National University 2011-12-01
Series:Karpatsʹkì Matematičnì Publìkacìï
Online Access:http://journals.pu.if.ua/index.php/cmp/article/view/98/87