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arXiv 1302.6819cs.AI
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可能性逻辑的另一种证明方法及其在术语逻辑中的应用

An Alternative Proof Method for Possibilistic Logic and its Application to Terminological Logics

Bernhard Hollunder

摘要:

可能性逻辑是一阶逻辑的扩展,处理可以用可能性和必要性度量来估计的不确定性。在句法上,这意味着一阶公式配备了一个可能性程度或必要性程度,表示公式在多大程度上可能或必然为真。可能性解决方案产生一个演算的可能性逻辑,尊重语义发展的可能性逻辑。可能性归结继承自经典归结的一个缺点是,如果应用于属于一阶逻辑的可判定片段的公式,它可能不会终止。因此,我们提出了一个替代的证明方法的可能性逻辑。这种方法的主要特点是,它完全从一个具体的微积分抽象,但作为基本操作的经典蕴涵测试使用。然后,我们实例化的可能性逻辑与术语逻辑,这是一个可判定的子类的一阶逻辑,但更有表现力比命题逻辑。这产生了一个扩展的术语逻辑对表示不确定的知识,这是令人满意的语义以及算法的角度来看。

英文摘要:

Possibilistic logic, an extension of first-order logic, deals with uncertainty that can be estimated in terms of possibility and necessity measures. Syntactically, this means that a first-order formula is equipped with a possibility degree or a necessity degree that expresses to what extent the formula is possibly or necessarily true. Possibilistic resolution yields a calculus for possibilistic logic which respects the semantics developed for possibilistic logic. A drawback, which possibilistic resolution inherits from classical resolution, is that it may not terminate if applied to formulas belonging to decidable fragments of first-order logic. Therefore we propose an alternative proof method for possibilistic logic. The main feature of this method is that it completely abstracts from a concrete calculus but uses as basic operation a test for classical entailment. We then instantiate possibilistic logic with a terminological logic, which is a decidable subclass o f first-order logic but nevertheless much more expressive than propositional logic. This yields an extension of terminological logics towards the representation of uncertain knowledge which is satisfactory from a semantic as well as algorithmic point of view.

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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