On nice equivalence relations on λ2

被引：0
作者：
Saharon Shelah
机构：
[1] The Hebrew University,Institute of Mathematics, Mathematics Department
[2] Israel and Rutgers University,undefined
来源：
Archive for Mathematical Logic | 2004年 / 43卷
关键词：
Set theory; Definable equivalence relation; Generalized descriptive set theory to uncountable cardinals; Perfect sets of pairwise non equivalence; Abelian group; Ext;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Let E be an equivalence relation on the powerset of an uncountable set, which is reasonably definable. We assume that any two subsets with symmetric difference of size exactly 1 are not equivalent. We investigate whether for E there are many pairwise non equivalent sets.
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页码：31 / 64
页数：33
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