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Re:Mathematicians Discover New Way for Spheres to 'Kiss' by tomrod on Thursday January 16, 2025 @08:24AM (#42724768)
A circle from a flat 2d manifold can be from a 3d sphere, cylinder, or other cross section.

Our mental models don't extend well beyond 3, possibly 4, dimensions, hence _all_ of our intuition starts to be doubtful after 3 dimensions.

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