Completely nonmeasurable unions |
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Authors: | Robert Rałowski Szymon Żeberski |
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Institution: | 1.Institute of Mathematics and Computer Science,Wroc?aw University of Technology,Wroc?aw,Poland |
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Abstract: | Assume that no cardinal κ < 2
ω
is quasi-measurable (κ is quasi-measurable if there exists a κ-additive ideal
$
\mathbb{I}
$
\mathbb{I}
of X contains uncountably many pairwise disjoint subfamilies
$
\mathbb{I}
$
\mathbb{I}
-Bernstein unions ∪
$
\mathbb{I}
$
\mathbb{I}
-Bernstein if A and X \ A meet each Borel $
\mathbb{I}
$
\mathbb{I}
-positive subset B ⊆ X). This result is a generalization of the Four Poles Theorem (see 1]) and results from 2] and 4]. |
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Keywords: | |
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