(July 23, 2018 at 1:20 pm)Jehanne Wrote: The math is fine (although, you need a graphic); it's the visualization that is difficult.
practice, practice, practice. Difficult is not the same as impossible.
I'd start by trying to imagine our 3D space as actually being the sphere in 4D with a very large curvature.
If that is the case, then no matter which direction you choose to go, you will eventually 'come around' to your starting point. Just like on a 2D sphere in 3D.
Can you imagine that?
If so, then think about what has to happen with spheres inside our space of increasingly large radii. When the radius gets to 'half way around', then the 'circle' is just a point and the 'circumference' is zero.
if not, then try harder.
