The minimal cofinality of an ultrapower of ω and the cofinality of the symmetric group can be larger than b+
Mildenberger, Heike, Shelah, SaharonVolume:
76
Language:
english
Journal:
The Journal of Symbolic Logic
DOI:
10.2178/jsl/1318338852
Date:
December, 2011
File:
PDF, 1.23 MB
english, 2011