Boundedness Theorems for Dilators and Ptykes
نویسنده
چکیده
Kechris, A.S., Boundedness theorems for dilators and ptykes, Annals of Pure and Applied Logic 52 (1991) 79-92. The main theorem of this paper is: If f is a partial function from K, to X, which is Pi-bounded, then there is a weakly finite primitive recursive dilator D such that for all infinite a E domu), f(a) s D(a). The proof involves only elementary combinatorial constructions of trees. A generalization to ptykes is also given.
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عنوان ژورنال:
- Ann. Pure Appl. Logic
دوره 52 شماره
صفحات -
تاریخ انتشار 1991