Friday, December 18, 2009

SAT and hill-climbing

SAT is a classifical NP problem, now what is the best known algorithm for building an approximate solution? WalkSAT

Pick a random unsatisfied clauses
Consider 3 moves; flipping each variable
If (any improve the evaluation)
accept the best
probability 0.5 : take the least bad
probability 0.5: pick a random move

Impressive no? and what this algorithm reminds to you?

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