松弛算法-->Bellman-Ford-->SPFA - q175291788的专栏 - 博客频道 - CSDN.NET



松弛操作：

单源最短路径算法中使用了松弛（relaxation）操作。对于每个顶点v∈V，都设置一个属性d[v]，用来描述从源点s到v的最短路径上权值的上界，称为最短路径估计（shortest-path estimate）。π[v]代表S到v的当前最短路径中v点之前的一个点的编号,我们用下面的Θ(V)时间的过程来对最短路径估计和前趋进行初始化。


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