Reducibility and Completeness for Sets o
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Richard M. Friedberg; Hartley Rogers jr.
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Article
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1959
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John Wiley and Sons
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English
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The study of recursively invariant properties of sets of integers was initiated, in large part, in the 1944paper of POST [l]. Various notions of reducibility, redefined below, are introduced in that paper ; and a set is called complete with respect to a given reducibility if (i) it is recursively en