EntityQ13636406· pop 5· linked from 13 articleshole argumentSign in to savephilosophical argument against general covarianceConnectionsgeneral covarianceEntitygauge fixingEntitySunConceptAlbert EinsteinPersonInternational Standard Book NumberEntityDavid HilbertEntitygeneral relativityEntityWayback MachineEntitydigital object identifierEntityInternational Standard Serial NumberEntitystring theoryEntityQ180686Entitygravitational fieldEntitybibcodeEntityOxford University PressEntityQ118398EntityQ229883EntityCarlo RovelliEntityloop quantum gravityEntityLee SmolinEntityCategoriesGeneral relativityObsolete theories in physics