A sequence of theories for arithmetic whose union is complete
Aldo Ursini (1977)
Rendiconti del Seminario Matematico della Università di Padova
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Aldo Ursini (1977)
Rendiconti del Seminario Matematico della Università di Padova
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Rendiconti del Seminario Matematico della Università di Padova
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First we show a few well known mathematical diagonal reasonings. Then we concentrate on diagonal reasonings typical for mathematical logic.
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We investigate the reverse mathematical strength of Turing determinacy up to Σ₅⁰, which is itself not provable in second order arithmetic.
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