The conjecture on Fujimoto-interpretable finite approximations to Tarski biconditionals

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Let AA be a finitely axiomatized Vaught theory in signature Θ0\Theta_0, let N:A⊳RN:A\rhd{\sf R}, and suppose ⊤⊳ATBN−\top\rhd_A{\sf TB}^{-}_N. Finite-approximation conjecture. There is a β\beta such that \top\rhd_A\beta\mathrel{\text{\textcolor{gray}{\blacktriangleright}}}_A{\sf TB}^{-}_N. More generally, if AA is a finitely axiomatized Vaught theory and ⊤⊳AV\top\rhd_A V, then there is a BB such that \top\rhd_A B\mathrel{\text{\textcolor{gray}{\blacktriangleright}}}_A V. The paper presents this as a second conjecture concerning finite axiomatizations and Fujimoto interpretability.

References

Primary source

Albert Visser, “Enayat Theories”, arXiv:1909.08877 (2019).

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