Tag Archives: 54G20

Diamond on ladder systems and countably metacompact topological spaces

Joint work with Rodrigo Rey Carvalho and Tanmay Inamdar. Abstract. Leiderman and Szeptycki proved that a single Cohen real introduces a ladder system L over 1 for which the space XL is not a Δ-space. They asked whether there is … Continue reading

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A counterexample related to a theorem of Komjáth and Weiss

Joint work with Rodrigo Rey Carvalho. Abstract. In a paper from 1987, Komjath and Weiss proved that for every regular topological space X of character less than b, if X(top ω+1)ω1, then X(top α)ω1 for all α<ω1. In addition, … Continue reading

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