关于LK的Herbrand含量
On the Herbrand content of LK
摘要:
我们提出了一个结构表示的Herbrand内容的LK证明与削减的复杂性prenex Sigma-2/Pi-2。该表示采取的形式,一个类型的非确定性树文法的顺序2生成一个有限的语言的一阶项出现在Herbrand扩展通过削减消除。特别是,对于每一个根岑风格的减少之间的LK证明,我们研究的诱导语法和分类的情况下,语言平等和包容举行。
英文摘要:
We present a structural representation of the Herbrand content of LK-proofs with cuts of complexity prenex Sigma-2/Pi-2. The representation takes the form of a typed non-deterministic tree grammar of order 2 which generates a finite language of first-order terms that appear in the Herbrand expansions obtained through cut-elimination. In particular, for every Gentzen-style reduction between LK-proofs we study the induced grammars and classify the cases in which language equality and inclusion hold.
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