- Source: Line perfect graph
In graph theory, a line perfect graph is a graph whose line graph is a perfect graph. Equivalently, these are the graphs in which every odd-length simple cycle is a triangle.
A graph is line perfect if and only if each of its biconnected components is a bipartite graph, the complete graph K4, or a triangular book K1,1,n. Because these three types of biconnected component are all perfect graphs themselves, every line perfect graph is itself perfect. By similar reasoning, every line perfect graph is a parity graph, a Meyniel graph, and a perfectly orderable graph.
Line perfect graphs generalize the bipartite graphs, and share with them the properties that the maximum matching and minimum vertex cover have the same size, and that the chromatic index equals the maximum degree.
See also
Strangulated graph, a graph in which every peripheral cycle is a triangle
References
Kata Kunci Pencarian:
- Microsoft
- TVXQ
- How I Met Your Mother
- Daftar masalah matematika yang belum terpecahkan
- Perfect graph
- Line graph
- Line perfect graph
- Strong perfect graph theorem
- Perfect graph theorem
- Meyniel graph
- Cycle (graph theory)
- Glossary of graph theory
- Bipartite graph
- Kőnig's theorem (graph theory)
