Groupwise density cannot be much bigger than the unbounded number

Saharon Shelah

doi:10.1002/malq.200710032

Groupwise density cannot be much bigger than the unbounded number

Saharon Shelah^*

^*Corresponding author for this work

Einstein Institute of Mathematics

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We prove that g (the groupwise density number) is smaller or equal to b⁺, the successor of the minimal cardinality of an unbounded subset of ^ωω. This is true even for the version of g for groupwise dense ideals.

Original language	English
Pages (from-to)	340-344
Number of pages	5
Journal	Mathematical Logic Quarterly
Volume	54
Issue number	4
DOIs	https://doi.org/10.1002/malq.200710032
State	Published - Jul 2008

Keywords

Cardinal characteristics of the continuum
Groupwise density
Unbounded number

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10.1002/malq.200710032

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Groupwise density cannot be much bigger than the unbounded number

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Keywords

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