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Displaying similar documents to “On invariant CCC σ -ideals”

Generalized Luzin sets

Lev Bukovský (2010)

Acta Universitatis Carolinae. Mathematica et Physica

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Around cofin

Andrzej Rosłanowski, Saharon Shelah (2014)

Colloquium Mathematicae

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We show the consistency of "there is a nice σ-ideal ℐ on the reals with add(ℐ) = ℵ₁ which cannot be represented as the union of a strictly increasing sequence of length ω₁ of σ-subideals". This answers [Borodulin-Nadzieja and Głąb, Math. Logic Quart. 57 (2011), 582-590, Problem 6.2(ii)].

Topologically invariant σ-ideals on Euclidean spaces

T. Banakh, M. Morayne, R. Rałowski, Sz. Żeberski (2015)

Fundamenta Mathematicae

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We study and classify topologically invariant σ-ideals with an analytic base on Euclidean spaces, and evaluate the cardinal characteristics of such ideals.