arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0904.3469cs.LOcs.AImath.LO
收藏

可计算性逻辑中的切换运算符

Toggling operators in computability logic

Shandong University(山东大学);Villanova University(维拉诺瓦大学)

Giorgi Japaridze

摘要:

可计算性逻辑(Computability Logic,CL)(参见http://www.cis.upenn.edu/~giorgi/cl.html)是一个将逻辑重新发展为可计算性的形式理论的研究项目,与传统上的形式真理论相反。CL中的公式代表交互式计算问题,被视为机器与其环境之间的游戏;逻辑运算符代表对这些实体的操作;“真理”被理解为有效解决方案的存在。合作语言的形式是开放的,并可能会经历一系列的扩展,随着研究的进展。到目前为止,已经研究了三种类型的合取和析取:平行的,顺序的和选择的。本文件增加了一个更自然的类型,这个集合,称为切换。切换操作可以被描述为选择操作的宽松版本,其中选择是可伸缩的,允许重新考虑任何有限次数。通过这种方式,他们在交互式计算中模拟试错式决策步骤。本文的主要技术成果是为可计算性逻辑的命题片断构造了一个合理而完整的公理化,它的词汇表和否定一起包括所有四种合取和析取:平行的、切换的、顺序的和选择的。除了切换合取和析取之外,本文还介绍了量词和递归运算的切换版本。

英文摘要:

Computability logic (CL) (see http://www.cis.upenn.edu/~giorgi/cl.html ) is a 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, seen 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. The formalism of CL is open-ended, and may undergo series of extensions as the studies of the subject advance. So far three -- parallel, sequential and choice -- sorts of conjunction and disjunction have been studied. The present paper adds one more natural kind to this collection, termed toggling. The toggling operations can be characterized as lenient versions of choice operations where choices are retractable, being allowed to be reconsidered any finite number of times. This way, they model trial-and-error style decision steps in interactive computation. The main technical result of this paper is constructing a sound and complete axiomatization for the propositional fragment of computability logic whose vocabulary, together with negation, includes all four -- parallel, toggling, sequential and choice -- kinds of conjunction and disjunction. Along with toggling conjunction and disjunction, the paper also introduces the toggling versions of quantifiers and recurrence operations.

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。

↑