🌐EnglishEnglishDeutschFrançaisРусский中文EntityQ1128435· pop 7· linked from 28 articlesHadwiger conjectureconjecture that all graphs requiring k or more colors contain a k-vertex complete minorAvailable in 7 languagesFrançaisDeutschРусскийCatalanHungarianUkrainianvia Wikidata sitelinks · CC0Connectionsgraph coloringEntityglossary of graph theory termsEntityCategoriesConjecturesGraph coloringGraph minor theoryUnsolved problems in graph theory