منابع مشابه
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 ωω. This is true even for the version of g for groupwise dense ideals.
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ژورنال
عنوان ژورنال: Proceedings of the American Mathematical Society
سال: 2015
ISSN: 0002-9939,1088-6826
DOI: 10.1090/proc/12978