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It's still current, in that no-one has managed to prove it wrong (yet); but no-one has managed to prove it right, either.

Is the concept still current, of our three dimensional Universe being finite because it is curved in all directions but in four dimensional space, each of those curvatures being complete (a closed loop) which results in there being no edge to it?

So, if this hypothesis were to be correct there could be a pressure (or whatever it may be called in four dimensional space) which is greater on the inside of the closed curvature than outside.