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by urinotherapist
1090 days ago
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> In spherical geometry, the equivalent of a straight line is a great circle. Yes, of course. If we substitute parallel lines with straight lines in spherical geometry and mix 2D and 3D spaces, then our mental model will be nonsensical but cute. We found no evidence of fourth dimension in the real world, so we cannot map this cute mathemagical model to reality. |
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