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Cutting planes and constant depth Frege proofs

机译:切割平面和恒定深度菲格尔

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The cutting planes refutation system for propositional logic is an extension of resolution and is based on showing the nonexistence of solutions for families of integer linear inequalities. The author defines a modified system of cutting planes with limited extension and shows that this system can polynomially simulate constant-depth Frege proof systems. The principal tool to establish this result is an effective version of cut elimination for modified cutting planes with limited extension. Thus, within a polynomial factor, one can simulate classical propositional logic proofs using modus ponens by refutation-style proofs, provided the formula depth is bounded by a constant. Propositional versions of the Paris-Harrington theorem, Kanamori-McAloon theorem, and variants are proposed as possible candidates for combinatorial tautologies that may require exponential-size cutting planes and Frege proofs.
机译:命题逻辑的切割平面驳回系统是分辨率的延伸,是基于显示整数线性不平等系列的解决方案的不存在性。作者定义了一种具有有限扩展的切割平面的修改系统,并表明该系统可以多项式模拟恒定深度弗赖特证明系统。建立此结果的主要工具是具有有限延伸的改进切割平面的切割消除的有效版本。因此,在多项式因素内,可以通过通过折叠式偏移来模拟使用MODUS Ponens的经典命题逻辑证据。 Paris-Harrington定位,Kanamori-Mcaloon定理和变体的命题版本是组合Tautologies可能需要指数尺寸的切割平面和弗赖特证明的可能候选者。

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