線完美圖
在圖論中,線完美圖(line perfect graph)是其線圖為完美圖的圖。同樣的,這些圖中每個奇數長度的簡單環都是一個三角形。[1]
若且唯若一個圖的任意雙連接組件都是二分圖、完全圖或三角形書 時,該圖被稱為線完美的,[2]因為這三種類型的雙連接組件本身是完美圖,其形成的線圖本身是完美的。[1] 通過類似的推理,所有的線完美圖都是奇偶圖[3]、梅尼爾圖[4]和完全有序圖.
參見
參考文獻
- ^ 1.0 1.1 Trotter, L. E., Jr., Line perfect graphs, Mathematical Programming, 1977, 12 (2): 255–259, MR 0457293, doi:10.1007/BF01593791
- ^ Maffray, Frédéric, Kernels in perfect line-graphs, Journal of Combinatorial Theory, Series B, 1992, 55 (1): 1–8, MR 1159851, doi:10.1016/0095-8956(92)90028-V.
- ^ Grötschel, Martin; Lovász, László; Schrijver, Alexander, Geometric algorithms and combinatorial optimization, Algorithms and Combinatorics 2 2nd, Springer-Verlag, Berlin: 281, 1993, ISBN 3-540-56740-2, MR 1261419, doi:10.1007/978-3-642-78240-4.
- ^ Wagler, Annegret, Critical and anticritical edges in perfect graphs, Graph-Theoretic Concepts in Computer Science: 27th International Workshop, WG 2001, Boltenhagen, Germany, June 14–16, 2001, Proceedings, Lecture Notes in Computer Science 2204, Berlin: Springer: 317–327, 2001, MR 1905643, doi:10.1007/3-540-45477-2_29.
- ^ de Werra, D., On line-perfect graphs, Mathematical Programming, 1978, 15 (2): 236–238, MR 0509968, doi:10.1007/BF01609025.