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arXiv 1304.4396math.LO
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一致反射原理的正可证性逻辑

Positive provability logic for uniform reflection principles

Lev Beklemishev

摘要:

我们处理的片段模态逻辑组成的公式的影响,建立了从变量和常数“真”的合取和钻石。较弱的语言允许人们将菱形解释为算术中的统一反射模式,可能具有不受限制的逻辑复杂性。我们用自然数和ω表示一个算术完全演算,其中ω对应于完全一致反射模式,而n<ω对应于它对算术n+1公式的限制.这种演算被证明是完整的w.r.t.一个合适的类有限Kripke模型和可判定的多项式时间。

英文摘要:

We deal with the fragment of modal logic consisting of implications of formulas built up from the variables and the constant `true' by conjunction and diamonds only. The weaker language allows one to interpret the diamonds as the uniform reflection schemata in arithmetic, possibly of unrestricted logical complexity. We formulate an arithmetically complete calculus with modalities labeled by natural numbers and ω, where ωcorresponds to the full uniform reflection schema, whereas n<ωcorresponds to its restriction to arithmetical Π_{n+1}-formulas. This calculus is shown to be complete w.r.t. a suitable class of finite Kripke models and to be decidable in polynomial time.

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