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view wisdom/klein bottle @ 11366:6b397cda825b
<shachaf> undo 11356
author | HackBot |
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date | Wed, 28 Feb 2018 01:54:09 +0000 |
parents | 3ce8590589fa |
children |
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A Klein bottle is like a torus, but more insidious. Taneb tried to invent it, but got trapped inside.