Abstract
In this paper we discuss what kind of constrains combinatorial covering properties of Menger, Scheepers, and Hurewicz impose on remainders of topological groups. For instance, we show that such a remainder is Hurewicz if and only it is \(\sigma \)-compact. Also, the existence of a Scheepers non-\(\sigma \)-compact remainder of a topological group follows from CH and yields a P-point, and hence is independent of ZFC. We also make an attempt to prove a dichotomy for the Menger property of remainders of topological groups in the style of Arhangel’skii.
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The research of Angelo Bella that led to the present paper was partially supported by a grant of the group GNSAGA of INdAM. Seçil Tokgöz would like to thank Hacettepe University BAP project 014 G 602 002 for its support. Lyubomyr Zdomskyy would like to thank the Austrian Academy of Sciences (APART Program) as well as the Austrian Science Fund FWF (Grant I 1209-N25) for generous support for this research.
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Bella, A., Tokgöz, S. & Zdomskyy, L. Menger remainders of topological groups. Arch. Math. Logic 55, 767–784 (2016). https://doi.org/10.1007/s00153-016-0493-8
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DOI: https://doi.org/10.1007/s00153-016-0493-8