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2015 | OriginalPaper | Chapter

Nondeterministic Tree Width of Regular Languages

Authors : Cezar Câmpeanu, Kai Salomaa

Published in: Descriptional Complexity of Formal Systems

Publisher: Springer International Publishing

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Abstract

The tree width of a nondeterministic finite automaton (NFA) counts the maximum number of computations the automaton may have on a given input. Here we consider the tree width of a regular language, which, roughly speaking, measures the amount of nondeterminism that a state-minimal NFA for the language needs. We prove that an infinite tree width is obtained from finite tree width, for most operations on regular languages.

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Metadata
Title
Nondeterministic Tree Width of Regular Languages
Authors
Cezar Câmpeanu
Kai Salomaa
Copyright Year
2015
DOI
https://doi.org/10.1007/978-3-319-19225-3_4

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