Title of article :
CLP-compactness for topological spaces and groups
Author/Authors :
Dikranjan، نويسنده , , Dikran، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 2007
Abstract :
We study CLP-compact spaces (every cover consisting of clopen sets has a finite subcover) and CLP-compact topological groups. In particular, we extend a theorem on CLP-compactness of products from [J. Steprāns, A. Šostak, Restricted compactness properties and their preservation under products, Topology Appl. 101 (3) (2000) 213–229] and we offer various criteria for CLP-compactness for spaces and topological groups, that work particularly well for precompact groups. This allows us to show that arbitrary products of CLP-compact pseudocompact groups are CLP-compact. For every natural n we construct:(i)
lly disconnected, n-dimensional, pseudocompact CLP-compact group; and
ditarily disconnected, n-dimensional, totally minimal, CLP-compact group that can be chosen to be either separable metrizable or pseudocompact (a Hausdorff group G is totally minimal when all continuous surjective homomorphisms G → H , with a Hausdorff group H, are open).
Keywords :
CLP-compact group , Totally minimal group , Precompact group , Compact abelian group , Pseudocompact group , CLP-compact space
Journal title :
Topology and its Applications
Journal title :
Topology and its Applications