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- Q6664524 subject Q8415876.
- Q6664524 abstract "In constraint satisfaction, local search is an incomplete method for finding a solution to a problem. It is based on iteratively improving an assignment of the variables until all constraints are satisfied. In particular, local search algorithms typically modify the value of a variable in an assignment at each step. The new assignment is close to the previous one in the space of assignment, hence the name local search.All local search algorithms use a function that evaluates the quality of assignment, for example the number of constraints violated by the assignment. This amount is called the cost of the assignment. The aim of local search is that of finding an assignment of minimal cost, which is a solution if any exists. Two classes of local search algorithms exist. The first one is that of greedy or non-randomized algorithms. These algorithms proceed by changing the current assignment by always trying to decrease (or at least, non-increase) its cost. The main problem of these algorithms is the possible presence of plateaus, which are regions of the space of assignments where no local move decreases cost. The second class of local search algorithm have been invented to solve this problem. They escape these plateaus by doing random moves, and are called randomized local search algorithms.".
- Q6664524 thumbnail Local-search-plateau.svg?width=300.
- Q6664524 wikiPageExternalLink index.html.
- Q6664524 wikiPageExternalLink benchmarks.htm.
- Q6664524 wikiPageWikiLink Q1128326.
- Q6664524 wikiPageWikiLink Q272735.
- Q6664524 wikiPageWikiLink Q5164379.
- Q6664524 wikiPageWikiLink Q7961996.
- Q6664524 wikiPageWikiLink Q8415876.
- Q6664524 wikiPageWikiLink Q846564.
- Q6664524 wikiPageWikiLink Q875276.
- Q6664524 comment "In constraint satisfaction, local search is an incomplete method for finding a solution to a problem. It is based on iteratively improving an assignment of the variables until all constraints are satisfied. In particular, local search algorithms typically modify the value of a variable in an assignment at each step.".
- Q6664524 label "Local search (constraint satisfaction)".
- Q6664524 depiction Local-search-plateau.svg.
