🌐EnglishEnglishDeutschPortuguêsРусскийEntityQ5659354· pop 5· linked from 7 articlesharmonious coloringproper vertex coloring in which every pair of colors appears on at most one pair of adjacent verticesAvailable in 5 languagesРусскийPortuguêsHungarianUkrainianvia Wikidata sitelinks · CC0Connectionsgraph coloringEntityInternational Standard Book NumberEntityCategoriesGraph coloring