A hierarchy based on a type two object
نویسندگان
چکیده
منابع مشابه
A Hierarchy Based on a Type Two Object
The object of hierarchy theory is to break down certain classes of predicates into subclasses of gradually increasing complexity. An excellent example is furnished by the hyperarithmetical hierarchy. Here each class in the hierarchy is obtained from the previous class by adding a single number quantifier. The Souslin-Kleene theorem [2, XXIV] then tells us that the predicates occurring in the hi...
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ژورنال
عنوان ژورنال: Transactions of the American Mathematical Society
سال: 1968
ISSN: 0002-9947
DOI: 10.1090/s0002-9947-1968-0263626-0