Maximal almost disjoint families, determinacy, and forcing
نویسندگان
چکیده
We study the notion of $\mathcal J$-MAD families where J$ is a Borel ideal on $\omega$. show that if an arbitrary $F_\sigma$ ideal, or any finite countably iterated Fubini product ideals, then there are no analytic infinite families, and assuming Projective Determinacy projective families; under full Axiom + $V=\mathbf{L}(\mathbb{R})$ J$-mad families. These results apply in particular when sets $\mathrm{Fin}$, which corresponds to classical MAD The proofs combine ideas from invariant descriptive set theory forcing.
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ژورنال
عنوان ژورنال: Journal of Mathematical Logic
سال: 2021
ISSN: ['0219-0613', '1793-6691']
DOI: https://doi.org/10.1142/s0219061321500264