Perfect-set forcing for uncountable cardinals
نویسندگان
چکیده
منابع مشابه
Uncountable Admissibles I: Forcing
Assume V = L. Let k be a regular cardinal and for X Qk let a(X) denote the least ordinal a such that ¿„[A"] is admissible. In this paper we characterize those ordinals of the form <x{X) using forcing and fine structure of L techniques. This generalizes a theorem of Sacks which deals with the case k = w. Forcing has proved to be an extremely valuable tool for the recursion-theorist. Generic sets...
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ژورنال
عنوان ژورنال: Annals of Mathematical Logic
سال: 1980
ISSN: 0003-4843
DOI: 10.1016/0003-4843(80)90021-2