Originally posted by VectraMan
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And from (for example) a topology point of view, all pentagons that do not intersect themselves are one and the same.
(Pentagons where each side intersects 2 other sides are different from that, but the same as each other. Do you know any other kinds of pentagon apart from those two?)
Isomorphism is the essence of mathematics, and of symmetry, and of understanding the universe.
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