EntityQ2226822· pop 10· linked from 23 articlesVizing's theoremSign in to savetheorem in graph coloringConnectionsJournal of Combinatorial TheoryEntityInternational Standard Book NumberEntityNovosibirskEntitysphereEntitydigital object identifierEntityInternational Standard Serial NumberEntityPaul ErdősEntitygraph theoryEntitytorusEntityClaude ShannonEntitygraphEntityPlatonic solidEntityQ118398Entityfour color theoremEntityQ22908627Entityplanar graphEntitybipartite graphEntityNP-completeEntityPeter Guthrie TaitEntitytime complexityEntityCategoriesGraph coloringTheorems in graph theory