EntityQ3082377· pop 5· linked from 295 articleshyperkähler manifoldSign in to saveRiemannian manifold with Sp(n) holonomy, or equivalently with an S² family of Kähler structuresConnectionshistory of string theoryEntitystring theoryEntityCalabi–Yau manifoldEntityholonomyEntityalmost complex manifoldEntityblack braneEntityRicci-flat manifoldEntityphysicsEntityBlack holeConceptInternational Standard Book NumberEntitysphereEntitydigital object identifierEntityDavid GrossEntityGerard 't HooftEntityholographyEntityquaternionEntityMichio KakuEntitytorusEntitygravitonEntityJSTOROrganizationCategoriesComplex manifoldsDifferential geometryQuaternionsRiemannian manifoldsStructures on manifolds