bn:01115745n
Noun Concept
Categories: Mathematical logic hierarchies, Effective descriptive set theory, Hierarchy, Complexity classes, Computability theory
EN
arithmetical hierarchy  AH  arithmetic hierarchy  arithmetic reducibility  arithmetical reducibility
EN
In mathematical logic, the arithmetical hierarchy, arithmetic hierarchy or Kleene–Mostowski hierarchy classifies certain sets based on the complexity of formulas that define them. Wikipedia
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EN
In mathematical logic, the arithmetical hierarchy, arithmetic hierarchy or Kleene–Mostowski hierarchy classifies certain sets based on the complexity of formulas that define them. Wikipedia
Hierarchy which classifies certain sets based on the complexity of formulas that define them Wikidata
A hierarchy which classifies the complexity of first-order formulae (and sets defined by them) based on the number of alternations between series of unbounded existential quantifiers and universal quantifiers. Wiktionary