局部最优解 Definition 3.6.1.4.Let U =(SI,So,L,LI,M,cost,goal)be an optimiza- tion problem,and let,for every x E LI,the function fr be neighborhood on M(x).A feasible solution a E M(x)is a local optimum for the input instance x of U according to f,if cost(a)=goalfcost(B)BE fz(a)}. We denote the set of all local optima for x according to the neighborhood fx by LocOPTU(x,f). 退而求其次，也是一个很好的策略局部最优解 退而求其次，也是一个很好的策略