EntityQ495412· pop 7· linked from 27 articlesSchoenflies problemSign in to saveproblem in geometric topologyConnectionsmathematicsEntityInternational Standard Book NumberEntitycircleEntitysphereEntitydigital object identifierEntityplaneEntitycurveEntityJSTOREntityCambridge University PressEntityhomeomorphismEntityCamille JordanEntitytessellationEntityJohn MilnorEntityCauchy's integral formulaEntityStephen SmaleEntityQ22908627EntityKonstantinos CarathéodoryEntityRiemann sphereEntitydense setEntityhomotopyEntityCategoriesDiffeomorphismsDifferential topologyGeometric topologyHomeomorphismsMathematical problemsTheorems in topology