Title of article :
HFD groups in the Solovay model
Author/Authors :
Szeptycki، نويسنده , , Paul J. and Tomita، نويسنده , , Artur H. Swiergiel، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 2009
Abstract :
Hajnal and Juhász proved that under CH there is a hereditarily separable, hereditarily normal topological group without non-trivial convergent sequences that is countably compact and not Lindelöf. The example constructed is a topological subgroup H ⊆ 2 ω 1 that is an HFD with the following property(P)
ojection of H onto every partial product 2 I for I ∈ [ ω 1 ] ω is onto.
uch group has the necessary properties. We prove that if κ is a cardinal of uncountable cofinality, then in the model obtained by forcing over a model of CH with the measure algebra on 2 κ , there is an HFD topological group in 2 ω 1 which has property (P).
Keywords :
Non-trivial convergent sequences , Random real , Topological group , Hereditarily finally dense , Countably compact , Solovay model
Journal title :
Topology and its Applications
Journal title :
Topology and its Applications