Products of Lindelöf spaces with points Gδ

    Research output: Contribution to journalArticle


    We show that if CH holds and either (i) there exists an ω1-Kurepa tree, or (ii) □(ω2) holds, then there are regular T1 Lindelöf spaces X0 and X1 with points Gδ such that the extent of X0×X1 is strictly greater than 2ω.

    Original languageEnglish
    Pages (from-to)90-96
    Number of pages7
    JournalTopology and its Applications
    Publication statusPublished - 2019 Feb 1


    • Aronszajn tree
    • Kurepa tree
    • Lindelöf space
    • Points G
    • Square principle

    ASJC Scopus subject areas

    • Geometry and Topology

    Fingerprint Dive into the research topics of 'Products of Lindelöf spaces with points G<sub>δ</sub>'. Together they form a unique fingerprint.

  • Cite this