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"Realizing Levels of the Hyperarithmetic Hierarchy as Degree Spectra of ..."
Denis R. Hirschfeldt, Walker M. White (2002)
- Denis R. Hirschfeldt, Walker M. White:
Realizing Levels of the Hyperarithmetic Hierarchy as Degree Spectra of Relations on Computable Structures. Notre Dame J. Formal Log. 43(1): 51-64 (2002)
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