🌐EnglishEnglishDeutschFrançaisPortuguêsРусскийEntityQ1443782· pop 5· linked from 13 articlesMoser spindleundirected unit-distance graph requiring four colorsWikidata factsImageMoser spindle pseudotriangulation.svgSources (1)en.wikipedia.orgvia Wikidata · CC0Available in 5 languagesFrançaisDeutschРусскийUkrainianvia Wikidata sitelinks · CC0Connectionsgraph coloringEntityInternational Standard Book NumberEntityCategoriesIndividual graphsPlanar graphs