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arXiv 1005.3986math.LOcs.LO
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Herbrand定理的证明网

Proof nets for Herbrand's Theorem

Richard McKinley

摘要:

本文探讨了经典逻辑证明论的两个中心结果:根森的微积分割消与赫布兰德的“基本定理”之间的联系。本文从Herbrand定理的一种高度结构化的表达方式Miller的扩展树证明出发,定义了一阶经典逻辑的无弱化证明网演算,并给出了一个弱规范化割消过程。在这种演算中,不可能对割消的汇合给出通常的反例,但它仍然是不汇合的,这使人们相信经典逻辑本质上是不汇合的。

英文摘要:

This paper explores the connection between two central results in the proof theory of classical logic: Gentzen's cut-elimination for the sequent calculus and Herbrands "fundamental theorem". Starting from Miller's expansion-tree-proofs, a highly structured way presentation of Herbrand's theorem, we define a calculus of weakening-free proof nets for (prenex) first-order classical logic, and give a weakly-normalizing cut-elimination procedure. It is not possible to formulate the usual counterexamples to confluence of cut-elimination in this calculus, but it is nonetheless nonconfluent, lending credence to the view that classical logic is inherently nonconfluent.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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