A topological space is totally paracompact if any base of this space contains a locally finite subcover. We focus on a problem of Curtis whether in the class of regular Lindelöf spaces total paracompactness is equivalent to the Menger covering property. To this end we consider topological spaces with certain dense subsets. It follows from our results that the above equivalence holds in the class of Lindelöf GO-spaces defined on subsets of reals. We also provide a game-theoretical proof that any regular Menger space is totally paracompact and show that in the class of first-countable spaces the Menger game and a partial open neighborhood assignment game of Aurichi are equivalent. We also show that if b=ω1, then there is an uncountable subspace of the Sorgenfrey line whose all finite powers are Lindelöf, which is a strengthening of a famous result due to Michael.
Totally paracompact spaces and the Menger covering property
Bonanzinga, Maddalena;Giacopello, Davide
;Szewczak, Piotr
2026-01-01
Abstract
A topological space is totally paracompact if any base of this space contains a locally finite subcover. We focus on a problem of Curtis whether in the class of regular Lindelöf spaces total paracompactness is equivalent to the Menger covering property. To this end we consider topological spaces with certain dense subsets. It follows from our results that the above equivalence holds in the class of Lindelöf GO-spaces defined on subsets of reals. We also provide a game-theoretical proof that any regular Menger space is totally paracompact and show that in the class of first-countable spaces the Menger game and a partial open neighborhood assignment game of Aurichi are equivalent. We also show that if b=ω1, then there is an uncountable subspace of the Sorgenfrey line whose all finite powers are Lindelöf, which is a strengthening of a famous result due to Michael.Pubblicazioni consigliate
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