Graph G Graph theory 16 Graphic methods 12 Intersection graph 8 Algorithms 6 Chromatic number 6 Clique graphs 6 Color 6 Induced subgraphs 6 Polynomial approximation 6 Polynomial-time algorithms 6 B-chromatic number 4 Circular-arc graph 4 Coloring 4 Complete solutions 4 Helly circular-arc graphs 4 Induced matchings 4 K-behavior 4 Linear time 4 Mathematical operators 4 Monotonicity 4 P4-tidy graphs 4 Proper Helly circular-arc graphs 4 Recognition algorithm 4 b-coloring 4 b-continuity 4 b-monotonicity 4 Adjacent vertices 2 Biclique 2 Biclique graphs 2