| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4661663 | Annals of Pure and Applied Logic | 2015 | 27 Pages |
Abstract
We outline a portfolio of novel iterable properties of c.c.c. and proper forcing notions and study its most important instantiations, Y-c.c. and Y-properness. These properties have interesting consequences for partition-type forcings and anticliques in open graphs. Using Neeman's side condition method it is possible to obtain PFA variations and prove consistency results for them.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Logic
Authors
David Chodounský, JindÅich Zapletal,