Products of Lindelöf spaces with points Gδ

    Research output: Contribution to journalArticle

    Abstract

    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
    Volume252
    DOIs
    Publication statusPublished - 2019 Feb 1

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    Keywords

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

    ASJC Scopus subject areas

    • Geometry and Topology

    Cite this

    Products of Lindelöf spaces with points Gδ . / Usuba, Toshimichi.

    In: Topology and its Applications, Vol. 252, 01.02.2019, p. 90-96.

    Research output: Contribution to journalArticle

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