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An introduction to perfect graphs in graph theory, defining the concept and listing some classes of graphs known to be perfect, including bipartite graphs, line graphs of bipartite graphs, comparability graphs, and chordal graphs. Perfect graphs are characterized by having the chromatic number equal to the clique number for every induced subgraph.
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Graph Theory: Lecture No. 23
Perfect Graphs: A graph G is perfect if
χ(H) = ω(H) for every induced subgraph H of
G.
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Graph Theory: Lecture No. 23
Some classes which are known to be perfect:
1 Bipartite Graphs
2 Complements of Bipartite Graphs
3 Line graphs of Bipartite Graphs.
4 Complements of Bipartite Graphs.
5 Comparability Graphs.
6 Co-comparability Graphs.
7 Interval Graphs
8 Co-Interval Graphs.
9 Chordal Graphs.
10 Co-Chordal Graphs. Docsity.com