Forcing with ideals of closed sets
逻辑
2007-05-23 v1
摘要
Let I be a sigma-ideal sigma-generated by a projective collection of closed sets. The forcing with I-positive Borel sets is proper and adds a single real r of an almost minimal degree: if s is a real in V[r] then s is Cohen generic over V or V[s]=V[r].
引用
@article{arxiv.math/0109026,
title = {Forcing with ideals of closed sets},
author = {Jindrich Zapletal},
journal= {arXiv preprint arXiv:math/0109026},
year = {2007}
}