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arXiv · 1402.0961

A generalization of Solovay's $\Sigma$-construction

Vladimir Kanovei
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Abstract

A $\Sigma$-construction of Solovay is partially extended to the case of intermediate sets which are not necessarily subsets of the ground model. As an application, we prove that, for a given name $t$, the set of all sets $t[G]$, $G$ being generic over the ground model, is Borel. This result was first established by Zapletal by a totally different descriptive set theoretic argument.

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Vladimir Kanovei. 2014-02-05. A generalization of Solovay's $\Sigma$-construction. https://doi.org/10.1134/s0037446615060117

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