Page 1

Displaying 1 – 9 of 9

Showing per page

Forcing with ideals generated by closed sets

Jindřich Zapletal (2002)

Commentationes Mathematicae Universitatis Carolinae

Consider the poset P I = Borel ( ) I where I is an arbitrary σ -ideal σ -generated by a projective collection of closed sets. Then the P I extension is given by a single real r of an almost minimal degree: every real s V [ r ] is Cohen-generic over V or V [ s ] = V [ r ] .

Fragments of strong compactness, families of partitions and ideal extensions

Laura Fontanella, Pierre Matet (2016)

Fundamenta Mathematicae

We investigate some natural combinatorial principles related to the notion of mild ineffability, and use them to obtain new characterizations of mild ineffable and weakly compact cardinals. We also show that one of these principles may be satisfied by a successor cardinal. Finally, we establish a version for κ ( λ ) of the canonical Ramsey theorem for pairs.

Currently displaying 1 – 9 of 9

Page 1