Tree-walking automata do not recognize all regular languages

Tree-walking automata do not recognize all regular languages
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树行走自动机无法识别所有常规语言

DOI:
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发表时间:
2005
期刊:
Symposium on the Theory of Computing
影响因子:
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通讯作者:
Thomas Colcombet
Thomas Colcombet
中科院分区:
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文献类型:
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作者:
Mikolaj Bojanczyk;Thomas Colcombet

文献摘要

被引文献

相似文献

树行走自动机是一种用于识别树型语言的自然顺序模型。每一个树语言识别的树行走自动机是正规的。在本文中,我们提出了一个树语言,这是定期的,但不承认任何(非确定性)树行走自动机。这解决了恩格尔弗里特、胡格布姆和货车贝斯特的一个猜想。此外,分离树语言已经在包含左子、右子和祖先关系的签名上在一阶逻辑中是可定义的。
Tree-walking automata are a natural sequential model for recognizing tree languages. Every tree language recognized by a tree-walking automaton is regular. In this paper, we present a tree language which is regular but not recognized by any (nondeterministic) tree-walking automaton. This settles a conjecture of Engelfriet, Hoogeboom and Van Best. Moreover, the separating tree language is definable already in first-order logic over a signature containing the left-son, right-son and ancestor relations.