EntityQ266775· pop 8· linked from 69 articlescrossing numberSign in to savethe smallest number of edge crossings possible in a drawing of a node-link graphConnectionsgraphEntityOn-Line Encyclopedia of Integer SequencesEntityWorld War IIConceptsociologyEntityInternational Standard Book NumberEntityquadrilateralEntitydigital object identifierEntityInternational Standard Serial NumberEntitygraph theoryEntityQ180686EntityJSTOREntitybibcodeEntityQ118398EntityproportionalityEntitydistributed computingEntityheuristicEntityConstructivismEntityQ229883EntityMathWorldEntitycomplete graphEntityCategoriesGeometric intersectionGraph drawingGraph invariantsNP-complete problemsTopological graph theory