AMPL Moment
Figure 6.35 orovides the AMPL model for the maximal flow problem.The data applies to Example 6.4-2 (file amplEx6.4-2.txt.). The overall idea of determining the input and output flows at a node issimilar to the one detaliled following Example 6.3-6 of the shortest-route model (you will find it helpful to review files amplEx6.3-6a.txt and amplEx6.3-6b.txt first). However, because the model is designed to find the maximal flow between any two nodes , start and end , two additional constraints are needed to ensure that no flow enters start and no flow leaves and. Constraints inStart and