Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
On optimal heuristic randomized semidecision procedures, with application to proof complexity. / Hirsch, Edward A.; Itsykson, Dmitry.
STACS 2010 - 27th International Symposium on Theoretical Aspects of Computer Science. 2010. p. 453-464 (Leibniz International Proceedings in Informatics, LIPIcs; Vol. 5).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
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TY - GEN
T1 - On optimal heuristic randomized semidecision procedures, with application to proof complexity
AU - Hirsch, Edward A.
AU - Itsykson, Dmitry
PY - 2010/12/1
Y1 - 2010/12/1
N2 - The existence of a (p-)optimal propositional proof system is a major open question in (proof) complexity; many people conjecture that such systems do not exist. Krajíček and Pudlák [KP89] show that this question is equivalent to the existence of an algorithm that is optimal1 on all propositional tautologies. Monroe [Mon09] recently gave a conjecture implying that such algorithm does not exist. We show that in the presence of errors such optimal algorithms do exist. The concept is motivated by the notion of heuristic algorithms. Namely, we allow the algorithm to claim a small number of false "theorems" (according to any polynomial-time samplable distribution on non-tautologies) and err with bounded probability on other inputs. Our result can also be viewed as the existence of an optimal proof system in a class of proof systems obtained by generalizing automatizable proof systems.
AB - The existence of a (p-)optimal propositional proof system is a major open question in (proof) complexity; many people conjecture that such systems do not exist. Krajíček and Pudlák [KP89] show that this question is equivalent to the existence of an algorithm that is optimal1 on all propositional tautologies. Monroe [Mon09] recently gave a conjecture implying that such algorithm does not exist. We show that in the presence of errors such optimal algorithms do exist. The concept is motivated by the notion of heuristic algorithms. Namely, we allow the algorithm to claim a small number of false "theorems" (according to any polynomial-time samplable distribution on non-tautologies) and err with bounded probability on other inputs. Our result can also be viewed as the existence of an optimal proof system in a class of proof systems obtained by generalizing automatizable proof systems.
KW - Optimal algorithm
KW - Propositional proof complexity
UR - http://www.scopus.com/inward/record.url?scp=78650841667&partnerID=8YFLogxK
U2 - 10.4230/LIPIcs.STACS.2010.2475
DO - 10.4230/LIPIcs.STACS.2010.2475
M3 - Conference contribution
AN - SCOPUS:78650841667
SN - 9783939897163
T3 - Leibniz International Proceedings in Informatics, LIPIcs
SP - 453
EP - 464
BT - STACS 2010 - 27th International Symposium on Theoretical Aspects of Computer Science
T2 - 27th International Symposium on Theoretical Aspects of Computer Science, STACS 2010
Y2 - 4 March 2010 through 6 March 2010
ER -
ID: 49786774