Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review
On tseitin formulas, read-once branching programs and treewidth. / Glinskih, Ludmila; Itsykson, Dmitry.
Computer Science – Theory and Applications - 14th International Computer Science Symposium in Russia, CSR 2019, Proceedings. ed. / René van Bevern; Gregory Kucherov. Springer Nature, 2019. p. 143-155 (Lecture Notes in Computer Science; Vol. 11532).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review
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TY - GEN
T1 - On tseitin formulas, read-once branching programs and treewidth
AU - Glinskih, Ludmila
AU - Itsykson, Dmitry
PY - 2019/1/1
Y1 - 2019/1/1
N2 - We show that any nondeterministic read-once branching program that decides a satisfiable Tseitin formula based on an n× n grid graph has size at least 2Ω(n). Then using the Excluded Grid Theorem by Robertson and Seymour we show that for arbitrary graph G(V, E) any nondeterministic read-once branching program that computes a satisfiable Tseitin formula based on G has size at least (formula presented) for all (formula presented)1/36, where tw (G) is the treewidth of G (for planar graphs and some other classes of graphs the statement holds for δ= 1). We also show an upper bound of (formula presented), where pw (G) is the pathwidth of G. We apply the mentioned results to the analysis of the complexity of derivations in the proof system OBDD (∧, reordering) and show that any OBDD (∧, reordering) -refutation of an unsatisfiable Tseitin formula based on a graph G has size at least (formula presented).
AB - We show that any nondeterministic read-once branching program that decides a satisfiable Tseitin formula based on an n× n grid graph has size at least 2Ω(n). Then using the Excluded Grid Theorem by Robertson and Seymour we show that for arbitrary graph G(V, E) any nondeterministic read-once branching program that computes a satisfiable Tseitin formula based on G has size at least (formula presented) for all (formula presented)1/36, where tw (G) is the treewidth of G (for planar graphs and some other classes of graphs the statement holds for δ= 1). We also show an upper bound of (formula presented), where pw (G) is the pathwidth of G. We apply the mentioned results to the analysis of the complexity of derivations in the proof system OBDD (∧, reordering) and show that any OBDD (∧, reordering) -refutation of an unsatisfiable Tseitin formula based on a graph G has size at least (formula presented).
KW - Grid
KW - Read-once branching program
KW - Treewidth
KW - Tseitin formula
KW - WIDTH
UR - http://www.scopus.com/inward/record.url?scp=85068599079&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/tseitin-formulas-readonce-branching-programs-treewidth
U2 - 10.1007/978-3-030-19955-5_13
DO - 10.1007/978-3-030-19955-5_13
M3 - Conference contribution
AN - SCOPUS:85068599079
SN - 9783030199548
T3 - Lecture Notes in Computer Science
SP - 143
EP - 155
BT - Computer Science – Theory and Applications - 14th International Computer Science Symposium in Russia, CSR 2019, Proceedings
A2 - van Bevern, René
A2 - Kucherov, Gregory
PB - Springer Nature
T2 - 14th International Computer Science Symposium in Russia, CSR 2019
Y2 - 1 July 2019 through 5 July 2019
ER -
ID: 49785149