PERFECT SUBSETS OF GENERALIZED BAIRE SPACES AND LONG GAMES
PERFECT SUBSETS OF GENERALIZED BAIRE SPACES AND LONG GAMES
复制标题
广义 BAIRE 空间和长博弈的完美子集
DOI:
10.1017/jsl.2017.44
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Philipp Schlicht
中科院分区:
文献类型:
--
作者:
Philipp Schlicht
Abstract We extend Solovay’s theorem about definable subsets of the Baire space to the generalized Baire space λ λ, where λ is an uncountable cardinal with λ <λ = λ. In the first main theorem, we show that the perfect set property for all subsets of λ λ that are definable from elements of λ Ord is consistent relative to the existence of an inaccessible cardinal above λ. In the second main theorem, we introduce a Banach–Mazur type game of length λ and show that the determinacy of this game, for all subsets of λ λ that are definable from elements of λ Ord as winning conditions, is consistent relative to the existence of an inaccessible cardinal above λ. We further obtain some related results about definable functions on λ λ and consequences of resurrection axioms for definable subsets of λ λ.
影响因子:
1
作者:
Philipp Lücke;Luca Motto Ros;Philipp Schlicht
通讯作者:
Philipp Schlicht