Operational State Complexity of Subtree-Free Regular Tree Languages

Sang Ki Ko, Hae Sung Eom, Yo Sub Han

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We introduce subtree-free regular tree languages that are closely related to XML schemas and investigate the state complexity of basic operations on subtree-free regular tree languages. The state complexity of an operation for regular tree languages is the number of states that are sufficient and necessary in the worst-case for the minimal deterministic ranked tree automaton that accepts the tree language obtained from the operation. We establish the precise state complexity of (sequential, parallel) concatenation, (bottom-up, top-down) star, intersection and union for subtree-free regular tree languages.

Original languageEnglish
Pages (from-to)705-724
Number of pages20
JournalInternational Journal of Foundations of Computer Science
Volume27
Issue number6
DOIs
Publication statusPublished - 2016 Sep 1

All Science Journal Classification (ASJC) codes

  • Computer Science (miscellaneous)

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