The cofinality of the symmetric group and the cofinality of ultrapowers

Heike Mildenberger*, Saharon Shelah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We prove that mcf and mcf are both consistent relative to ZFC. This answers a question by Banakh, Repovš and Zdomskyy and a question from [MS11].

Original languageEnglish
Pages (from-to)97-128
Number of pages32
JournalIsrael Journal of Mathematics
Volume242
Issue number1
DOIs
StatePublished - Apr 2021

Bibliographical note

Publisher Copyright:
© 2021, The Hebrew University of Jerusalem.

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