EntityQ444931· pop 5· linked from 20 articlesfundamental polygonSign in to savepolygon associated with a compact Riemann surfaceConnectionsconvex setEntityRiemann surfaceEntityVoronoi diagramEntityHarold Scott MacDonald CoxeterEntitycovering spaceEntitymathematicsEntityInternational Standard Book NumberEntityHenri PoincaréEntitysphereEntitydiameterEntityrhombusEntitydigital object identifierEntityAndrey KolmogorovEntitytorusEntityJohann Peter Gustav Lejeune DirichletEntityJSTOROrganizationmetric spaceEntityabelian groupEntityCambridge University PressEntityif and only ifEntityCategoriesCombinatorial group theoryConformal geometryGeometric topologyRiemann surfaces