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arXiv:1310.3250 [math.LO]AbstractReferencesReviewsResources

$Σ^1_2$ and $Π^1_1$ mad families

Asger Törnquist

Published 2013-10-11Version 1

We answer in the affirmative the following question of J\"org Brendle: If there is a $\Sigma^1_2$ mad family, is there then a $\Pi^1_1$ mad family?

Comments: This will appear in the Journal of Symbolic Logic (March 2014)
Categories: math.LO
Subjects: 03E15
Keywords: mad family
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