Collapsing of cardinals in generalized Cohen's forcing
Miroslav Repický (1988)
Acta Universitatis Carolinae. Mathematica et Physica
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Displaying similar documents to “Separating collections”
Collapsing of cardinals in generalized Cohen's forcing
Properties of measure and category in generalized Cohen's and Silver's forcing
Miroslav Repický (1987)
Acta Universitatis Carolinae. Mathematica et Physica
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On saturated sets of ideals and Ulam's problem
Alan Taylor (1980)
Fundamenta Mathematicae
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Ideals on the real line and Ulam's problem
Andrzej Pelc (1981)
Fundamenta Mathematicae
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Extending the ideal of nowhere dense subsets of rationals to a P-ideal
Rafał Filipów, Nikodem Mrożek, Ireneusz Recław, Piotr Szuca (2013)
Commentationes Mathematicae Universitatis Carolinae
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We show that the ideal of nowhere dense subsets of rationals cannot be extended to an analytic P-ideal, ideal nor maximal P-ideal. We also consider a problem of extendability to a non-meager P-ideals (in particular, to maximal P-ideals).