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  1. Some Consequences of the Axiom of Constructibility.J. W. Addison - 1963 - Journal of Symbolic Logic 28 (4):293-293.
  • Systems of logic based on ordinals..Alan Turing - 1939 - London,: Printed by C.F. Hodgson & son.
  • Degrees of unsolvability: structure and theory.Richard L. Epstein - 1979 - New York: Springer Verlag.
    The contributions in the book examine the historical and contemporary manifestations of organized crime, the symbiotic relationship between legitimate and ...
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  • On initial segments of hyperdegrees.S. K. Thomason - 1970 - Journal of Symbolic Logic 35 (2):189-197.
  • On Degrees of Recursive Unsolvability.Clifford Spector - 1957 - Journal of Symbolic Logic 22 (4):374-375.
  • Recursively Enumerable Sets of Positive Integers and Their Decision Problems.Emil L. Post - 1945 - Journal of Symbolic Logic 10 (1):18-19.
  • Distributive Initial Segments of the Degrees of Unsolvability.A. H. Lachlan - 1968 - Mathematical Logic Quarterly 14 (30):457-472.
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  • Distributive Initial Segments of the Degrees of Unsolvability.A. H. Lachlan - 1968 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 14 (30):457-472.
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  • Countable initial segments of the degrees of unsolvability.A. H. Lachlan & R. Lebeuf - 1976 - Journal of Symbolic Logic 41 (2):289-300.
  • The Upper Semi-Lattice of Degrees of Recursive Unsolvability.S. C. Kleene & Emil L. Post - 1956 - Journal of Symbolic Logic 21 (4):407-408.
  • Double Jumps of Minimal Degrees.Carl G. Jockusch & David B. Posner - 1978 - Journal of Symbolic Logic 43 (4):715 - 724.
  • An application of Σ40 determinacy to the degrees of unsolvability.Carl G. Jockusch - 1973 - Journal of Symbolic Logic 38 (2):293-294.
  • A degree-theoretic definition of the ramified analytical hierarchy.Carl G. Jockusch & Stephen G. Simpson - 1976 - Annals of Mathematical Logic 10 (1):1-32.
  • A criterion for completeness of degrees of unsolvability.Richard Friedberg - 1957 - Journal of Symbolic Logic 22 (2):159-160.
  • The strong homogeneity conjecture.L. Feiner - 1970 - Journal of Symbolic Logic 35 (3):375-377.
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