Interpreting reflexive theories in finitely many axioms

Tom 152 / 1997

Fundamenta Mathematicae 152 (1997), 99-116 DOI: 10.4064/fm-152-2-99-116

Streszczenie

For finitely axiomatized sequential theories F and reflexive theories R, we give a characterization of the relation 'F interprets R' in terms of provability of restricted consistency statements on cuts. This characterization is used in a proof that the set of $∏_1$ (as well as $∑_1$) sentences π such that GB interprets ZF+π is $Σ^0_3$-complete.

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