A coanalytic Menger group that is not $\sigma$-compact

Authors : Seçil Tokgöz

Pages : 12-20

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Publication Date : 9999-12-31

Article Type : Makaleler

Abstract :Under $V=L$ we construct coanalytic topological subgroups of reals, demonstrating that even for definable groups of reals, selection principles may differ.
Keywords : Coanalytic, Menger, Hurewicz, Rothberger, $gamma$-property, $sigma$-compact, $V=L$, productively Lindelöf, topological group