2 citations · 4 across the 8 of their papers we have counts for
4 papers · 2 filters
Forcing with ideals of closed sets
Jindrich Zapletal
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 deg…
Countable Support Iteration Revisited
Jindrich Zapletal
Whenever P is a proper definable forcing for adding a real, the countable support iteration of P has all the preservation properties it can possibly have, within a wide syntactical…
Isolating Cardinal Invariants
Jindrich Zapletal
There is an optimal way to increase certain cardinal invariants of the continuum.
Duality Chipped
Jindrich Zapletal
Whenever I is a projectively generated projectively defined sigma ideal on the reals, if ZFC+large cardinals proves cov(I)=continuum then ZFC+large cardinals proves non(I)<aleph fo…