like a 3d movie, get rid of your lightconeheaded Minkowski-ism (stupid slogan aobut phase-space, then he died at 43).
> Like a 3d holographic movie. It doesn't matter how you play > it or view it . An object moving at constant velocity can consider > itself at rest . Whether or not any notion of 'absolute space' of > 'absolute time' will be needed in a unified theory is beyond the scope > of this discussion .
> Here's the metric for a 3-sphere . Add an additional time dimension > (an extra row and column in the metric tensor with -1 in the corner > and zero in the other entries ) and you're ready to calculate > trajectories .