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Regular Expressions with Lookahead

descriptionPublicationkeyboard_double_arrow_right Article 28 Apr 2021 Sweden Publisher:Pensoft PublishersJournal:JUCS - Journal of Universal Computer Science, volume 27, pages 324-340 (issn: 0948-695X, eissn: 0948-6968, Copyright policy )
Authors: Berglund,Martin; van der Merwe,Brink; van Litsenborgh,Steyn;

doi: 10.3897/jucs.66330

Regular Expressions with Lookahead

Abstract

This paper investigates regular expressions which in addition to the standard operators of union, concatenation, and Kleene star, have lookaheads. We show how to translate regular expressions with lookaheads (REwLA) to equivalent Boolean automata having at most 3 states more than the length of the REwLA. We also investigate the state complexity when translating REwLA to equivalent deterministic finite automata (DFA).

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Keywords

Datavetenskap (datalogi), Computer Sciences, Electronic computers. Computer science, Boolea, QA75.5-76.95, Regular expressions, Lookahead expressions, Boolean automata

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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