Controlling classical cardinal characteristics while collapsing cardinals
Abstract
Given a forcing notion that forces certain values to several classical cardinal characteristics of the reals, we show how we can compose with a collapse (of a cardinal to ) such that the composition still forces the previous values to these characteristics. We also show how to force distinct values to , and and also keeping all the values in Cicho\'n's diagram distint, using the Boolean Ultrapower method of arXiv:1708.03691 . (In arXiv:2006.09826 , the same was done for the newer Cicho\'n's Maximum construction, which avoids large cardinals.)
Keywords
Cite
@article{arxiv.1904.02617,
title = {Controlling classical cardinal characteristics while collapsing cardinals},
author = {Martin Goldstern and Jakob Kellner and Diego A. Mejía and Saharon Shelah},
journal= {arXiv preprint arXiv:1904.02617},
year = {2020}
}
Comments
Compared to the previous version arXiv:1904.02617v1 , parts have been removed that are included in arXiv:2006.09826 (a construction for 13 characteristics based on the Cichon's maximum construction without large cardinals, arXiv:1906.06608)