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zbMath0498.03039MaRDI QIDQ3962991

Stephen G. Simpson

Publication date: 1980

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

constructible sets hyperarithmetical hierarchy natural chains of Turing degrees obtained by iteration of the jump operator

Mathematics Subject Classification ID

Other degrees and reducibilities in computability and recursion theory (03D30) Hierarchies of computability and definability (03D55)

Related Items (2)

Degrees of Unsolvability: A Tutorial ⋮ Mass problems associated with effectively closed sets

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