The minimal cofinality of an ultrapower of ω and the cofinality of the symmetric group can be larger than b+

DOI10.2178/jsl/1318338852zbMath1271.03067OpenAlexW2074548127MaRDI QIDQ3107357

Heike Mildenberger, Saharon Shelah

Publication date: 23 December 2011

Published in: The Journal of Symbolic Logic (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.2178/jsl/1318338852

zbMATH Keywords

cofinality of the symmetric groupforcing techniqueminimum cofinality of an ultrapower

Mathematics Subject Classification ID

Consistency and independence results (03E35) Other combinatorial set theory (03E05) Cardinal characteristics of the continuum (03E17)

Related Items (1)

The cofinality of the symmetric group and the cofinality of ultrapowers

This page was built for publication: The minimal cofinality of an ultrapower of ω and the cofinality of the symmetric group can be larger than b⁺