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arXiv 1001.2175cs.LO
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套字加权逻辑与代数形式幂级数

Weighted Logics for Nested Words and Algebraic Formal Power Series

Christian Mathissen

摘要:

嵌套词是由Madhusudan和Alfred提出的一种递归程序模型,近年来引起了人们的广泛兴趣。本文引入了半环的数量扩张,研究了半环中的嵌套词元素的嵌套词列。我们表明,经常嵌套的字系列符合系列定义的加权逻辑介绍Droste和Gastin。为此,我们建立了一个嵌套的话和自由bisemigroup之间的连接。应用我们的结果,我们得到了代数形式幂级数的加权逻辑刻画。这推广了Lautemann,Schwentick和Therien关于上下文无关语言的结果。

英文摘要:

Nested words, a model for recursive programs proposed by Alur and Madhusudan, have recently gained much interest. In this paper we introduce quantitative extensions and study nested word series which assign to nested words elements of a semiring. We show that regular nested word series coincide with series definable in weighted logics as introduced by Droste and Gastin. For this we establish a connection between nested words and the free bisemigroup. Applying our result, we obtain characterizations of algebraic formal power series in terms of weighted logics. This generalizes results of Lautemann, Schwentick and Therien on context-free languages.

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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