Trees (mathematics) Graphic methods 16 Forestry 14 Algorithms 10 Trees 10 Coloring 8 Graph theory 8 Polynomial approximation 6 ^{P 4}-tidy graphs 4 Abstract data types 4 Circle graphs 4 Color 4 Computational complexity 4 Data tree 4 Dynamic frame 4 Dynamic programming 4 Fault tolerance 4 Graph coloring 4 Graph colorings 4 Helly circle graphs 4 Indistinguishability 4 Interval graph 4 Line graph 4 Line graphs of trees 4 Linear domino graphs 4 Machinery 4 Mathematics 4 Minimum sum coloring 4 Non-circular 4 Non-trivial 4