Semi-algebraic proof systems were introduced in [1] as extensions of Lovász-Schrijver proof systems [2,3].These systems are very strong; in particular, they have short proofs of Tseitin's tautologies, the pigeonhole principle, the symmetric knapsack problem and the cliquecoloring tautologies [1]. In this paper we study static versions of these systems.W e prove an exponential lower bound on the length of proofs in one such system.The same bound for two tree-like (dynamic) systems follows.The proof is based on a lower bound on the "Boolean degree" of Positivstellensatz Calculus refutations of the symmetric knapsack problem. © 2002 Springer-Verlag Berlin Heidelberg.
CITATION STYLE
Grigoriev, D., Hirsch, E. A., & Pasechnik, D. V. (2002). Exponential lower bound for static semi-algebraic proofs. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 2380 LNCS, pp. 257–268). Springer Verlag. https://doi.org/10.1007/3-540-45465-9_23
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