State complexity of deletion and bipolar deletion

Yo Sub Han, Sang Ki Ko, Kai Salomaa

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

It is well known that the language obtained by deleting an arbitrary language from a regular language is regular. We give an upper bound for the state complexity of deleting an arbitrary language from a regular language and a matching lower bound. We show that the state complexity of deletion is (Formula presented.) [respectively, (Formula presented.) ] when using complete (respectively, incomplete) deterministic finite automata. We show that the state complexity of bipolar deletion has an upper bound (Formula presented.) [respectively (Formula presented.) ] when using complete (respectively, incomplete) deterministic finite automata. In both cases we give almost matching lower bounds.

Original languageEnglish
Pages (from-to)67-85
Number of pages19
JournalActa Informatica
Volume53
Issue number1
DOIs
StatePublished - 1 Feb 2016

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