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arXiv 2108.12003cs.LO
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有限迹上的自动机线性动态逻辑

Automata Linear Dynamic Logic on Finite Traces

Kevin W. Smith, Moshe Y. Vardi

AI总结:

本文提出有限迹上的自动机线性动态逻辑(ALDL_f),通过结合命题逻辑与非确定性有限自动机表达时序约束,在保持PSPACE复杂度的同时获得了等价于一元二阶逻辑的表达能力提升。

摘要:

时序逻辑被形式方法与AI社区广泛使用。线性时序逻辑(LTL)是一种流行的时序逻辑,因其易用性以及在表达能力和复杂性之间的平衡而受到重视。LTL在表达能力上等价于一元一阶逻辑,且LTL的可满足性问题是PSPACE完全的。线性动态逻辑(LDL)是另一种时序逻辑,等价于一元二阶逻辑,但其可满足性检查方法无法应用于LDL公式的非平凡子集。在此,我们引入有限迹上的自动机线性动态逻辑(ALDL_f),并证明ALDL_f公式的可满足性问题属于PSPACE。作为有限迹上的线性动态逻辑(LDL_f)的变体,ALDL_f将命题逻辑与非确定性有限自动机(NFA)相结合以表达时序约束。ALDL_f在表达能力上等价于一元二阶逻辑。这在不增加成本的情况下提升了相对于LTL的表达能力。

英文摘要:

Temporal logics are widely used by the Formal Methods and AI communities. Linear Temporal Logic is a popular temporal logic and is valued for its ease of use as well as its balance between expressiveness and complexity. LTL is equivalent in expressiveness to Monadic First-Order Logic and satisfiability for LTL is PSPACE-complete. Linear Dynamic Logic (LDL), another temporal logic, is equivalent to Monadic Second-Order Logic, but its method of satisfiability checking cannot be applied to a nontrivial subset of LDL formulas. Here we introduce Automata Linear Dynamic Logic on Finite Traces (ALDL_f) and show that satisfiability for ALDL_f formulas is in PSPACE. A variant of Linear Dynamic Logic on Finite Traces (LDL_f), ALDL_f combines propositional logic with nondeterministic finite automata (NFA) to express temporal constraints. ALDL$_f$ is equivalent in expressiveness to Monadic Second-Order Logic. This is a gain in expressiveness over LTL at no cost.

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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