EntityQ704493· pop 7· linked from 17 articlesIb MadsenSign in to saveDanish mathematicianConnectionsCopenhagenEntityWayback MachineEntitydigital object identifierEntityUniversity of ChicagoEntityUniversity of CopenhagenEntityQ118398EntityRoyal Swedish Academy of SciencesEntityMathematics Genealogy ProjectEntityAarhus UniversityEntityOberwolfachEntityAmerican Mathematical SocietyEntityRoyal Danish Academy of Sciences and LettersEntityMathematical ReviewsEntityAnnals of MathematicsEntityActa MathematicaEntityHumboldt PrizeEntityUlrike TillmannEntitycohomologyEntityRoyal Norwegian Society of Sciences and LettersEntityOstrowski PrizeEntityCategories1942 birthsAcademic staff of Aarhus UniversityAcademic staff of the University of CopenhagenDanish mathematiciansFellows of the American Mathematical SocietyLiving peopleMembers of the Royal Swedish Academy of SciencesRoyal Norwegian Society of Sciences and LettersTopologistsUniversity of Chicago alumniUniversity of Copenhagen alumni