Quote:
Originally Posted by Frog march
If you have two points on a 2-sphere, and draw a line between them, you can define points inside the 2-sphere, in 3D space.
I was just wondering, if the Universe were a 3-sphere, could you define points in 4dimensions, by using two points in our space?
Is this done?
maybe this is trite, but I thought I would post anyway.
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I believe that's the concept behind LISA.
Supposedly gravity acts across 4D. So LISA will detect it with it's vast 3D span.
Corrections are welcome.
ETA: See this video for reference to LISA concept. 
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"They reasoned that an object situated at the center and related equally to the extremes in every direction can have no impulse to move in any specific direction. In fact, they compared the situation of such an object with that of a man violently but equally hungry and thirsty, standing at the same distance from food and drink and unable to decide in which direction to move." - Aristotle
Last edited by a1call; 10-July-2009 at 04:45 PM..
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