Differences
This shows you the differences between two versions of the page.
| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| courses:cs211:winter2012:journals:joey:home [2012/04/04 03:46] – [Chapter 7 - Network Flow] brownjn | courses:cs211:winter2012:journals:joey:home [2012/04/04 04:31] (current) – [Chapter 7 - Network Flow] brownjn | ||
|---|---|---|---|
| Line 269: | Line 269: | ||
| **7.7 - Extensions to the Maximum-Flow Problem** | **7.7 - Extensions to the Maximum-Flow Problem** | ||
| - | Imagine the situation in which there are multiple sinks and sources. In this case, instead of max flow, each node has a demand or a supply | + | Imagine the situation in which there are multiple sinks and sources. In this case, instead of max flow, each node has a demand or a supply. In order to solve this problem, again, add a sink and source, or super-sink and super-source. The capacities of the edges going from the super-source to the supply nodes are equal to the supply offered by those nodes; and the edges going from the demand nodes to the super-sink are equal to the demand by those nodes. Then it is just a max flow problem. |
| + | |||
| + | **Interest: | ||
| + | |||
| + | **Readiblity: | ||
