Category:Unsolved problems in mathematics: Difference between revisions

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[[nl:Categorie:Onopgelost probleem in de wiskunde]]
[[ja:Category:数学のオープンプロブレム]]
[[nn:Kategori:Uløyste problem i matematikk]]
[[pl:Kategoria:Otwarte problemy matematyki]]
[[ro:Categorie:Probleme nerezolvate ale matematicii]]