🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng Việtالعربيةفارسی中文日本語EntityQ365859· pop 17ConcaveAlso known as ConcavityConcave or concavity may refer to:Article3 sectionsContentsScience and technologyMathematicsSee alsoConcave or concavity may refer to:==Science and technology== Concave lens Concave mirrorRead full article (4 paragraphs)Available in 17 languagesFrançaisDeutsch中文日本語العربيةCzechFinnishHungarianKabyleLuxembourgishNorwegianNorwegian NynorskConnectionslensEntityconvex setEntityCategoriesMathematics disambiguation pages