Perfect graphs and norms
β Scribed by Leszek S. Zaremba
- Publisher
- Springer-Verlag
- Year
- 1991
- Tongue
- English
- Weight
- 169 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0025-5610
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
It is shown that the following classes of graphs are recognizable (i.e. looking at the point-deleted subgraphs of a graph G one can decide whether G belongs to that class or not): (1) perfect graphs, (2) triangulated graphs, (3) interval graphs, (4) comparability graphs, (5) split graphs. Furthermor
An edge uv of a graph G is called a wing if there exists a chordless path with vertices u, v, x, y and edges uv, vx, xy. The wing-graph W(G) of a graph G is a graph having the same vertex set as G; uv is an edge in W(G) if and only if uv is a wing in and some vertex in C is adjacent to all the rema
Let i be a positive integer. We generalize the chromatic number x ( G ) of G and the clique number w(G) of G as follows: The i-chromatic number of G , denoted by x Z ( G ) , is the least number k for which G has a vertex partition V,, V,, . . . , Vk: such that the clique number of the subgraph induc