🌐EnglishEnglishDeutschNederlandsРусский한국어日本語EntityQ638846· pop 7· linked from 49 articlesintersection numbergeneralized notion of counting curve intersectionsAvailable in 7 languagesDeutsch日本語РусскийEsperantoNederlands한국어via Wikidata sitelinks · CC0ConnectionstangentEntityPoincaré dualityEntityCategoriesIntersection theoryRiemann surfaces