EntityQ329846· pop 21· linked from 88 articlesØystein OreSign in to saveNorwegian mathematician (1899–1968)ConnectionsUniversity of OsloEntitydivision ringEntityharmonic divisor numberEntityGalois connectionEntityMarshall HallEntityUnited StatesCountryNorwayCountrySwedenCountrycomputerEntityWorld War IIConceptOsloEntityprime numberEntitynumber theoryEntitymathematicianEntitydigital object identifierEntityYale UniversityEntityNiels Henrik AbelEntityEmmy NoetherEntitycombinatoricsEntityabstract algebraEntityCategories1899 births1968 deaths20th-century Norwegian mathematiciansCombinatorialistsHistorians of mathematicsLattice theoristsYale Sterling ProfessorsYale University faculty