🌐EnglishEnglishDeutschPortuguêsРусскийفارسی日本語EntityQ2558939· pop 5· linked from 73 articlesprojectively extended real lineAlso known as one-point compactification of the real lineextension of the set of the real numbers by a point denoted ∞Wikidata factsImageReal projective line.svgvia Wikidata · CC0Available in 5 languagesРусскийPortuguêsUkrainianفارسیvia Wikidata sitelinks · CC0Connectionsextended real number lineEntitypolynomialEntityCategoriesInfinityProjective geometryReal analysisTopological spaces