Analyzing Walksat on Random Formulas
Analyzing Walksat on Random Formulas
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DOI:
10.1137/12090191x
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发表时间:
2011-06
期刊:
影响因子:
--
通讯作者:
A. Coja-Oghlan;A. Frieze
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文献类型:
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作者:
A. Coja-Oghlan;A. Frieze
Let Φ be a uniformly distributed random k-SAT formula with n variables and m clauses. We prove that the Walksat algorithm from Papadimitriou (FOCS 1991)/Schoning (FOCS 1999) finds a satisfying assignment of Φ in polynomial time w.h.p. if m/n ≤ ρ · 2k/k for a certain constant ρ > 0. This is an improvement by a factor of Θ(k) over the best previous analysis of Walksat from Coja-Oghlan, Feige, Frieze, Krivelevich, Vilenchik (SODA 2009).