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arXiv 2109.09155cs.FLcs.CC
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基于通信复杂性的无标度自动机的下界

Lower Bounds for Unambiguous Automata via Communication Complexity

Mika Göös, Stefan Kiefer, Weiqiang Yuan

摘要:

我们使用的结果,从通信复杂性性,新的和旧的,证明下界的明确有限自动机(UFA)。我们展示了三个结果。$\textit{Complement:}$存在由$n$状态UFA识别的语言$L$,使得补充语言$\overline{L}$需要具有$n^{\tildeΩ(\log n)}$状态的NFA。这改进了Raskin的下界。$\textit{Union:}$存在被$n$状态UFA识别的语言$L_1$、$L_2$,使得联合$L_1\cup L_2$需要具有$n^{\tildeΩ(\log n)}$状态的UFA。$\textit{Separation:}$存在一种语言$L$,使得$L$和$\overline{L}$都被$n$状态的NFA识别,但是使得$L$需要具有$n^{Ω(\log n)}$状态的UFA。这反驳了Colcombet的一个猜想。

英文摘要:

We use results from communication complexity, both new and old ones, to prove lower bounds for unambiguous finite automata (UFAs). We show three results. $\textit{Complement:}$ There is a language $L$ recognised by an $n$-state UFA such that the complement language $\overline{L}$ requires NFAs with $n^{\tildeΩ(\log n)}$ states. This improves on a lower bound by Raskin. $\textit{Union:}$ There are languages $L_1$, $L_2$ recognised by $n$-state UFAs such that the union $L_1\cup L_2$ requires UFAs with $n^{\tildeΩ(\log n)}$ states. $\textit{Separation:}$ There is a language $L$ such that both $L$ and $\overline{L}$ are recognised by $n$-state NFAs but such that $L$ requires UFAs with $n^{Ω(\log n)}$ states. This refutes a conjecture by Colcombet.

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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