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arXiv 2002.09393cs.FLcs.LO
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$ω$的扩展--正则语言

Extensions of $ω$-Regular Languages

Mikołaj Bojańczyk, Edon Kelmendi, Rafał Stefański, Georg Zetzsche

摘要:

我们考虑一元二阶逻辑在$ω$ -词上的扩展,这是通过添加一种不是$ω$ -正则的语言而得到的。我们表明,如果添加的语言$L$有一个中立的字母,那么由此产生的逻辑必然是不可判定的。一个推论是,$ω$ -正则语言是唯一可判定的布尔封闭的完整三元组在$ω$ -字。

英文摘要:

We consider extensions of monadic second order logic over $ω$-words, which are obtained by adding one language that is not $ω$-regular. We show that if the added language $L$ has a neutral letter, then the resulting logic is necessarily undecidable. A corollary is that the $ω$-regular languages are the only decidable Boolean-closed full trio over $ω$-words.

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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