State complexity of operations on input-driven pushdown automata. / Okhotin, Alexander; Salomaa, Kai.
Mathematical Foundations of Computer Science 2011 - 36th International Symposium, MFCS 2011, Proceedings. 2011. p. 485-496 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 6907 LNCS).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review
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TY - GEN
T1 - State complexity of operations on input-driven pushdown automata
AU - Okhotin, Alexander
AU - Salomaa, Kai
PY - 2011
Y1 - 2011
N2 - The family of deterministic input-driven pushdown automata (IDPDA; a.k.a. visibly pushdown automata, a.k.a. nested word automata) is known to be closed under reversal, concatenation and Kleene star. As shown by Alur and Madhusudan ("Visibly pushdown languages", STOC 2004), the reversal and the Kleene star of an n-state IDPDA can be represented by an IDPDA 2O(n2) with states, while concatenation of an m-state and an n-state IDPDA is represented by an IDPDA with 2O((m+n)2) states. This paper presents more efficient constructions for the reversal and for the Kleene star, which yield 2 Θ(n log n) states, as well as an m 2 Θ(n log n)-state construction for the concatenation. These constructions are optimal due to the previously known matching lower bounds.
AB - The family of deterministic input-driven pushdown automata (IDPDA; a.k.a. visibly pushdown automata, a.k.a. nested word automata) is known to be closed under reversal, concatenation and Kleene star. As shown by Alur and Madhusudan ("Visibly pushdown languages", STOC 2004), the reversal and the Kleene star of an n-state IDPDA can be represented by an IDPDA 2O(n2) with states, while concatenation of an m-state and an n-state IDPDA is represented by an IDPDA with 2O((m+n)2) states. This paper presents more efficient constructions for the reversal and for the Kleene star, which yield 2 Θ(n log n) states, as well as an m 2 Θ(n log n)-state construction for the concatenation. These constructions are optimal due to the previously known matching lower bounds.
UR - http://www.scopus.com/inward/record.url?scp=80052108418&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-22993-0_44
DO - 10.1007/978-3-642-22993-0_44
M3 - Conference contribution
AN - SCOPUS:80052108418
SN - 9783642229923
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 485
EP - 496
BT - Mathematical Foundations of Computer Science 2011 - 36th International Symposium, MFCS 2011, Proceedings
T2 - 36th International Symposium on Mathematical Foundations of Computer Science, MFCS 2011
Y2 - 22 August 2011 through 26 August 2011
ER -
ID: 78945375