Increasing the groupwise density number by c.c.c. forcing

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Annals of Pure and Applied Logic 149 (1-3):7-13 (2007)
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Abstract

We show that is consistent

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10.1016/j.apal.2007.07.001

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Citations of this work

Groupwise density cannot be much bigger than the unbounded number.Saharon Shelah - 2008 - Mathematical Logic Quarterly 54 (4):340-344.

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References found in this work

Groupwise density and the cofinality of the infinite symmetric group.Simon Thomas - 1998 - Archive for Mathematical Logic 37 (7):483-493.
Partitions and filters.P. Matet - 1986 - Journal of Symbolic Logic 51 (1):12-21.

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