EntityQ4454675· pop 5· linked from 5 articlesBach tensorSign in to savetrace-free tensor of rank 2 which is conformally invariant in four dimensionsConnectionstheory of relativityEntitygeneral relativityEntitymathematical physicsEntitydifferential geometryEntitytensorEntityRiemann surfaceEntityRicci curvatureEntityalgebraic independenceEntityscalar curvatureEntityabstract index notationEntityWeyl tensorEntitySchouten tensorEntityCotton tensorEntityCategoriesTensorsTensors in general relativity