EntityQ5168006· pop 6· linked from 12 articlesCoordinate singularitySign in to saveApparent singularity in a coordinate frame that can be removed by using a different frameConnectionsmathematicsEntityphysicsEntityStephen HawkingPersonNorth PoleConceptWayback MachineEntitycoordinate systemEntitygeographical poleEntityGreenwich meridianEntityspherical coordinate systemEntitySchwarzschild metricEntitymathematical singularityEntitydiscontinuityEntityimaginary timeEntityHartle–Hawking stateEntityCategoriesMathematical analysis