Thread: Twin paradox
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Sep14-06, 05:56 PM
P: 631
Quote Quote by MeJennifer
You can think of such a model but you might want to ask yourself if such a model is uberhaupt possible in GR.

As I wrote before in a hyperspherical universe not just the spatial dimensions are closed but also the time dimension. In other words you can make a full roundtrip in time as well.

so your talking about a 5 dimensional universe, what I was thinking of was a 4d one. Is a 4 dimensional universe impossible?