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The complexity of identifying characteristic formulae
Journal of Logical and Algebraic Methods in Programming ( IF 0.7 ) Pub Date : 2020-02-17 , DOI: 10.1016/j.jlamp.2020.100529
Luca Aceto , Antonis Achilleos , Adrian Francalanza , Anna Ingólfsdóttir

We introduce the completeness problem for Modal Logic (possibly with fixpoint operators) and examine its complexity. A formula is called complete, if any two satisfying processes are bisimilar. The completeness problem is closely connected to the characterization problem, which asks whether a given formula characterizes a given process up to bisimulation equivalence. We discover that completeness, characterization, and validity have the same complexity — with some exceptions for which there are, in general, no complete formulae. To prove our upper bounds, we present a non-deterministic procedure with an oracle for validity that combines tableaux and a test for bisimilarity, and determines whether a formula is complete.



中文翻译:

识别特征公式的复杂性

我们介绍了模态逻辑的完整性问题(可能有定点运算符),并研究了其复杂性。如果有两个令人满意的过程是双相似的,则公式称为完成。完整性问题与表征问题密切相关,后者要求一个给定的公式是否可以表征一个给定的过程,直到双仿真对等。我们发现完整性,特征和有效性具有相同的复杂性-除了某些例外,通常没有完整的公式。为了证明我们的上限,我们提出了一个非确定性的过程,其中使用了一个预言性的oracle,它结合了表格和双相似性检验,并确定公式是否完整。

更新日期:2020-02-17
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