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arXiv 1407.4835cs.LO
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部分量词消去

Partial Quantifier Elimination

Eugene Goldberg, Panagiotis Manolios

摘要:

本文研究了部分量词消去(PQE)问题。给定公式exists(X)[F(X,Y)& G(X,Y)],其中F,G是合取范式,PQE问题是寻找一个公式F*(Y),使得F* & exists(X)[G]与exists(X)[F & G]逻辑等价.我们解决PQE问题,通过生成和添加到F子句的自由变量,使条款的F与量化的变量冗余。传统的量词消去问题(QE)是PQE的一种特殊情况,其中G为空,因此需要使具有量化变量的输入公式的所有子句变得冗余。PQE的重要性是双重的。首先,许多问题更自然地用PQE而不是QE来表述。其次,在许多情况下,PQE可以比QE更有效地解决。我们描述了一个PQE算法的依赖序列的机器的基础上,并给出实验结果显示的承诺PQE。

英文摘要:

We consider the problem of Partial Quantifier Elimination (PQE). Given formula exists(X)[F(X,Y) & G(X,Y)], where F, G are in conjunctive normal form, the PQE problem is to find a formula F*(Y) such that F* & exists(X)[G] is logically equivalent to exists(X)[F & G]. We solve the PQE problem by generating and adding to F clauses over the free variables that make the clauses of F with quantified variables redundant. The traditional Quantifier Elimination problem (QE) is a special case of PQE where G is empty so all clauses of the input formula with quantified variables need to be made redundant. The importance of PQE is twofold. First, many problems are more naturally formulated in terms of PQE rather than QE. Second, in many cases PQE can be solved more efficiently than QE. We describe a PQE algorithm based on the machinery of dependency sequents and give experimental results showing the promise of PQE.

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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