Abstract
We answer in the affirmative the following question of Jörg Brendle: If there is a Σ12 mad family, is there then a Π11 mad family?
Originalsprog | Engelsk |
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Tidsskrift | Journal of Symbolic Logic |
Vol/bind | 78 |
Udgave nummer | 4 |
Sider (fra-til) | 1181-1182 |
ISSN | 0022-4812 |
DOI | |
Status | Udgivet - 2013 |