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Formalizing of "Smullyan's Truth and Provability"

Formalizing by Lean 4 of Smullyan's elementary system 1 and Tarski's Undefinability Theorem (Theorem T, SmullyanModel.tarski) and Gödel's 1st Incompleteness Theorem (Theorem G, SmullyanModel.goedel1) in this system. Referred Section 2 in 2.

Footnotes

  1. Raymond M. Smullyan. Truth and Provability. 2013.

  2. T. Kurahashi and K. Tominaga. Smullyan's truth and provability. 2024. arxiv

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Formalizing of "Smullyan's Truth & Provability"

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