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TRUTH AND FEASIBLE REDUCIBILITY
The Journal of Symbolic Logic ( IF 0.5 ) Pub Date : 2019-09-20 , DOI: 10.1017/jsl.2019.24
Ali Enayat , Mateusz Łełyk , Bartosz Wcisło

Let ${\cal T}$ be any of the three canonical truth theories CT (compositional truth without extra induction), FS (Friedman–Sheard truth without extra induction), or KF (Kripke–Feferman truth without extra induction), where the base theory of ${\cal T}$ is PA (Peano arithmetic). We establish the following theorem, which implies that ${\cal T}$ has no more than polynomial speed-up over PA.Theorem.${\cal T}$is feasibly reducible to PA, in the sense that there is a polynomial time computable function f such that for every${\cal T}$-proof π of an arithmetical sentence ϕ, f (π) is a PA-proof of ϕ.

中文翻译:

真实性和可简化性

${\cal T}$是三个典型真理论 CT 中的任何一个-(没有额外归纳的组成真理),FS-(弗里德曼——没有额外归纳的谢德真理),或 KF-(没有额外归纳的 Kripke-Feferman 真),其中${\cal T}$是 PA(皮亚诺算术)。我们建立以下定理,这意味着${\cal T}$对 PA 的加速不超过多项式。定理。${\cal T}$可以简化为巴勒斯坦权力机构,从某种意义上说,有一个多项式时间可计算函数 f 使得对于每个${\cal T}$-算术句子 φ 的证明 π,F(π)是一个功放- 证明.
更新日期:2019-09-20
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