English

The full basis theorem does not imply analytic wellordering

Logic 2017-02-21 v2

Abstract

We make use of a finite support product of ω1\omega_1 clones of the Jensen minimal Π21\varPi^1_2 singleton forcing to obtain a model of ZFC in which every non-empty lightface analytically definable set of reals contains a lightface analytically definable real (the full basis theorem), but there is no analytically definable wellordering of the continuum.

Keywords

Cite

@article{arxiv.1702.03566,
  title  = {The full basis theorem does not imply analytic wellordering},
  author = {Vladimir Kanovei and Vassily Lyubetsky},
  journal= {arXiv preprint arXiv:1702.03566},
  year   = {2017}
}
R2 v1 2026-06-22T18:16:08.696Z