Bipartite and n-partite Graphs

This lecture introduces bipartite graphs, where vertices can be divided into two sets such that edges only connect vertices from different sets, and n-partite graphs, where vertices are divided into n sets with similar connectivity conditions. The instructor explains the concepts of bipartite complete graphs and n-partite complete graphs, providing examples such as the utility graph and star graphs. The lecture concludes with the definition and properties of n-partite complete graphs, including a formula to calculate their size. The instructor encourages the audience to rigorously prove the size formula as an exercise.