Journal of Symbolic Logic
- J. Symbolic Logic
- Volume 64, Issue 1 (1999), 75-80.
Dominating and Unbounded Free Sets
We prove that every analytic set in $^\omega\omega \times ^\omega\omega$ with $\sigma$-bounded sections has a not $\sigma$-bounded closed free set. We show that this result is sharp. There exists a closed set with bounded sections which has no dominating analytic free set, and there exists a closed set with non-dominating sections which does not have a not $\sigma$-bounded analytic free set. Under projective determinacy analytic can be replaced in the above results by projective.
J. Symbolic Logic, Volume 64, Issue 1 (1999), 75-80.
First available in Project Euclid: 6 July 2007
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Solecki, Slawomir; Spinas, Otmar. Dominating and Unbounded Free Sets. J. Symbolic Logic 64 (1999), no. 1, 75--80. https://projecteuclid.org/euclid.jsl/1183745693