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arXiv 0712.1345cs.LOcs.AImath.LO
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可计算性逻辑中的序列运算符

Sequential operators in computability logic

Villanova University(维拉诺瓦大学)

Giorgi Japaridze

摘要:

可计算性逻辑(Computability Logic,CL)(见http://www.cis.upenn.edu/cnigiorgi/cl.html)是一个语义学平台和研究程序,用于将逻辑重新发展为可计算性的形式理论,而不是传统上的真值的形式理论。CL中的公式代表(交互式)计算问题,被理解为机器与其环境之间的游戏;逻辑运算符表示对这些实体的操作;“真”被理解为有效解的存在,即,算法获胜策略的一部分CL的形式主义是开放式的,并可能会经历一系列的扩展,作为该主题的研究进展。到目前为止,CL一直关注的主要运营商群体是并行,选择,分支和盲运营商。本文介绍了一组新的重要算子,称为序列算子。后者的形式是连续的合取和析取、连续的量词和连续的递归。顾名思义,与这一组相关联的算法直觉是顺序计算的直觉,而不是与并行运算组相关联的并行计算的直觉:玩游戏的顺序组合意味着以顺序的方式一个接一个地玩它的组件。本文件的主要技术成果是一个健全的和完整的公理化的命题片段的可计算性逻辑的词汇,连同否定,包括所有三个-平行,选择和顺序-排序的合取和析取。这一结果的扩展到一阶水平也概述。

英文摘要:

Computability logic (CL) (see http://www.cis.upenn.edu/~giorgi/cl.html) is a semantical platform and research program for redeveloping logic as a formal theory of computability, as opposed to the formal theory of truth which it has more traditionally been. Formulas in CL stand for (interactive) computational problems, understood as games between a machine and its environment; logical operators represent operations on such entities; and "truth" is understood as existence of an effective solution, i.e., of an algorithmic winning strategy. The formalism of CL is open-ended, and may undergo series of extensions as the study of the subject advances. The main groups of operators on which CL has been focused so far are the parallel, choice, branching, and blind operators. The present paper introduces a new important group of operators, called sequential. The latter come in the form of sequential conjunction and disjunction, sequential quantifiers, and sequential recurrences. As the name may suggest, the algorithmic intuitions associated with this group are those of sequential computations, as opposed to the intuitions of parallel computations associated with the parallel group of operations: playing a sequential combination of games means playing its components in a sequential fashion, one after one. The main technical result of the present paper is a sound and complete axiomatization of the propositional fragment of computability logic whose vocabulary, together with negation, includes all three -- parallel, choice and sequential -- sorts of conjunction and disjunction. An extension of this result to the first-order level is also outlined.

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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