Similar but not the same: Various versions of clubsuit sign do not coincide

Mirna Džamonja*, Saharon Shelah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We consider various versions of the Clubsuit sign principle. This principle is a known consequence of ◇. It is well known that ◇ is not sensitive to minor changes in its definition, e.g., changing the guessing requirement form "guessing exactly" to "guessing modulo a finite set". We show however, that this is not true for Clubsuit sign. We consider some other variants of Clubsuit sign as well.

Original languageEnglish
Pages (from-to)180-198
Number of pages19
JournalJournal of Symbolic Logic
Volume64
Issue number1
DOIs
StatePublished - Mar 1999

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