β„•πŸͺœ:ΒΉ

#kleene hierarchy #arithmetical hierarchy #quantifier alternation #computability #mathematical logic #complexity classes #βˆƒ #βˆ€ #natural numbers

πŸ“Άβ„•[⁰→¹→²→...]

#kleene hierarchy #arithmetical hierarchy #levels of complexity #mathematical structure #computability

Σ⁰ₙΠ⁰ₙΔ⁰ₙπŸͺœβ†’Σ⁰₁Π⁰₁Δ⁰₁πŸͺœβ†’Σ⁰₂...

#kleene hierarchy #arithmetical hierarchy #computability theory #recursion theory #Οƒ0n #Ο€0n #Ξ΄0n #quantifier complexity #levels of complexity