We can embed a slice that includes time in a flat spacetime with two time dimensions and one space, and see the world line of an object oscillating in the borehole as a geodesic on that slice (the red curve here).
Greg Egan on Nostr: But that’s spatial curvature. What about spacetime? We can embed a slice that ...
But that’s spatial curvature. What about spacetime?
We can embed a slice that includes time in a flat spacetime with two time dimensions and one space, and see the world line of an object oscillating in the borehole as a geodesic on that slice (the red curve here).
We can embed a slice that includes time in a flat spacetime with two time dimensions and one space, and see the world line of an object oscillating in the borehole as a geodesic on that slice (the red curve here).