Graph theory 7 Graphic methods 6 Coloring 3 Perfect graphs 3 Characterization 2 Clique-perfect graphs 2 Computational complexity 2 Hereditary clique-Helly graphs 2 Line graph 2 Line graphs 2 Polynomial approximation 2 Problem solving 2 Set theory 2 Trees (mathematics) 2 ^{P 4}-tidy graphs 1 Algorithms 1 B-chromatic number 1 Balanced graphs 1 Bipartite graphs 1 Bounded coloring 1 Branch-and-cut algorithms 1 Capacitated coloring 1 Chromatic number 1 Circle graphs 1 Claw free graphs 1 Claw-free graphs 1 Clique perfect graphs 1 Color 1 Computational studies 1 Coordinated graphs 1