I will begin with considering three versions of Peano Secon-Order Arithmetic usually associated with the program of reverse mathematics, namely Z \(_{2}\) , and two of its most common subsystems, ACA \(_{0}\) and RCA \(_{0}\) .

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Z \({ }_{2}\) and its Subsystems

  • Marco Panza

摘要

I will begin with considering three versions of Peano Secon-Order Arithmetic usually associated with the program of reverse mathematics, namely Z \(_{2}\) , and two of its most common subsystems, ACA \(_{0}\) and RCA \(_{0}\) .