Category:Unsolved problems in mathematics: Difference between revisions

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[[he:קטגוריה:בעיות פתוחות במתמטיקה]]
[[nl:Categorie:Onopgelost probleem in de wiskunde]]
[[ja:Category:数学のオープンプロブレム]]
[[fi:Luokka:Ratkaisemattomat matemaattiset ongelmat]]