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arXiv 1404.6503cs.FLcs.LO
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分布式图自动机

Distributed Graph Automata

Fabian Reiter

摘要:

受分布式算法的启发,我们引入了一类新的有限图自动机,它可以精确地识别一元二阶逻辑中可定义的图形语言。对于词和树的情况,人们早就知道正则语言正是那些可以在一元二阶逻辑中定义的语言。在这方面,在目前的工作中提出的自动机可以被看作是,在某种程度上,作为一个推广的有限自动机图。此外,我们表明,不同于有限自动机的话和树,我们的自动机的确定性,不确定性和交替的变种形成一个严格的层次结构,就其表达能力。对于较弱的变体,空性问题是可判定的。

英文摘要:

Inspired by distributed algorithms, we introduce a new class of finite graph automata that recognize precisely the graph languages definable in monadic second-order logic. For the cases of words and trees, it has been long known that the regular languages are precisely those definable in monadic second-order logic. In this regard, the automata proposed in the present work can be seen, to some extent, as a generalization of finite automata to graphs. Furthermore, we show that, unlike for finite automata on words and trees, the deterministic, nondeterministic and alternating variants of our automata form a strict hierarchy with respect to their expressive power. For the weaker variants, the emptiness problem is decidable.

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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