Biparte graphs

In Lee s method the equations and variables are represented by nodes on the biparte graph (circles), connected by edges (lines), as shown in Figure 1.9. 

The biparte graph for this example, with 3 and 5 selected as the design variables (inputs), is shown in Figure 1.13. 

Biparticity criterion. Look carefully at Fig. 15 to see that the bipartite graphs shown in it break up into the subgraphs possessing only cycles with even number of... 

---