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arXiv 1609.04094cs.LO
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加权线性动态逻辑

Weighted Linear Dynamic Logic

Manfred Droste, George Rahonis

摘要:

本文介绍了一种加权线性动态逻辑(简称加权LDL),并证明了它的公式与加权有理表达式的等价性。这为Schützenberger基本定理增加了一个可识别序列的新特征。令人惊讶的是,等价性不需要对我们的加权LDL进行任何限制。我们的结果保持在任意的(resp。完全完备的半环(分别为)无限)的话。因此,域上加权LDL公式的等价问题在双指数时间内是可判定的。与经典逻辑相比,我们表明,我们的加权LDL是无法表达的加权LTL有限的话。我们确定了一个片段的加权LTL,这样的系列在有限和无限的话定义的LTL公式在这个片段中也可定义的加权LDL公式。

英文摘要:

We introduce a weighted linear dynamic logic (weighted LDL for short) and show the expressive equivalence of its formulas to weighted rational expressions. This adds a new characterization for recognizable series to the fundamental Schützenberger theorem. Surprisingly, the equivalence does not require any restriction to our weighted LDL. Our results hold over arbitrary (resp. totally complete) semirings for finite (resp. infinite) words. As a consequence, the equivalence problem for weighted LDL formulas over fields is decidable in doubly exponential time. In contrast to classical logics, we show that our weighted LDL is expressively incomparable to weighted LTL for finite words. We determine a fragment of the weighted LTL such that series over finite and infinite words definable by LTL formulas in this fragment are definable also by weighted LDL formulas.

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