EntityQ5659354· pop 5· linked from 7 articlesharmonious coloringSign in to saveproper vertex coloring in which every pair of colors appears on at most one pair of adjacent verticesConnectionsgraph coloringEntityInternational Standard Book NumberEntitydigital object identifierEntitygraph theoryEntitygraphEntitytreeEntitynodeEntityglossary of graph theory termsEntitycomplete coloringEntitygraph labelingEntityCategoriesGraph coloring