A Basis Theorem for Perfect Sets
A Basis Theorem for Perfect Sets
复制标题
完美集的基本定理
DOI:
10.2307/421023
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发表时间:
1998
影响因子:
0.6
通讯作者:
T. Slaman
中科院分区:
文献类型:
--
作者:
M. Groszek;T. Slaman
Abstract We show that if there is a nonconstructible real, then every perfect set has a nonconstructible element, answering a question of K. Prikry. This is a specific instance of a more general theorem giving a sufficient condition on a pair M ⊂ N of models of set theory implying that every perfect set in N has an element in N which is not in M.