𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Norms and perfect graphs

✍ Scribed by S. Perz; S. Rolewicz


Publisher
Springer
Year
1990
Tongue
English
Weight
426 KB
Volume
34
Category
Article
ISSN
0340-9422

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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