EntityQ3274262· pop 17· linked from 58 articlesimaginary timeSign in to saveWick-rotated time coordinates in relativistic field theoryConnectionsspacetimeEntitygravitational singularityEntitytimeEntityuniverseEntityStephen HawkingPersonBig BangEntityquantum mechanicsEntityInternational Standard Book NumberEntitycomplex numberEntitytheory of relativityEntityspeed of light in vacuumEntitygeneral relativityEntityspecial relativityEntityreal numberEntityrational numberEntitycosmologyEntityWayback MachineEntitydigital object identifierEntityirrational numberEntityRoger PenroseEntityCategoriesComplex numbersMathematical physicsPhilosophy of timeQuantum mechanics