As we know, now there is efficient algorithms to find the overall min-cut in a directed graph, e.g. Hao and Orlin (1994). 3 z N% u& j3 ^* `; S9 u0 `, u e, Q0 r
Now my problem is to find an overall min-cut just separating some given node pairs, not all the node pairs. For example, I have an 8-node digraph with capacities on each arc and want to find the overall min-cut separating some node pairs such as 8 and 1, 6 and 3, 7 and 1. The algorithm of Hao and Orlin (1994) cannot solve my problem. ' \' H- c6 V( _
3 R$ v/ ^$ y* x9 ]. v9 ? ( [8 S. Y% u- H9 e& F T9 j* E' p不好意思,我用英文至少为了把问题说的更清楚一点