Optimization of the flow through networks with gains

The optimal flow problem in networks with gains is presented through the simplex method. Out of simple theorical conditions, a method is built which needs only a relatively small number memory and quite a short calculation time by computer. Large examples are given; e.g., one test-example of 1000 nodes and 3000 arcs, and one real problem leading to a linear program of 3000 constraints and 8000 arcs.