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Theories of Arithmetics

NotationDescription
𝐏𝐀⁻Finitely axiomatized fragment of
𝐈Open + Induction of open formula
πˆπšΊβ‚€ + Induction of formulaTheory
πˆπšΊβ‚€ + Ω₁ + -axiom
𝐄𝐀Elementary arithmetic
πˆπšΊβ‚ + Induction of formulaTheory
𝐏𝐀Peano arithmetic