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Main Idea. V. X. Y. Y =y. Tree variables. Cycle cutset variables. X =x. Tree algorithm. GSAT. Local search. Dynamic programming. Flow Chat. Initialize. Y =y. Tree algorithm. 1. Problem is solved. Exit. 2. Specified condition is reached. X =x. GSAT.
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Main Idea V X Y Y=y Tree variables Cycle cutset variables X=x Tree algorithm GSAT Local search Dynamic programming
Flow Chat Initialize Y=y Tree algorithm 1. Problem is solved. Exit 2. Specified condition is reached. X=x GSAT
Inside view – calculate cost xi xj min min min SUM
Inside view – calculate value Non-consistent values
Summary 1. The problem must be solvable. 2. The problem must have tree-structure. 3. cycle-cutset size is bounded by 30% of the nodes. 4. All assigned value of X are consistent. So, too many restrictions…….