Groupwise density cannot be much bigger than the unbounded number

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 . This is true even for the version of g for groupwise dense ideals.

• Type: Journal
• Year: 2008
• Where: MLQ
• Authors: Saharon Shelah
• Keywords: Groupwise Density Number, Minimal Cardinality, MLQ 2008