A Klein bottle is an example of a "nonorientable surface" — a manifold where it is not possible to make a consistent choice of normal vector at each point. If you move a normal vector all the way around this surface, it points in the opposite direction as it originally did.pic.twitter.com/s5JHQSPR1A
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Yes I do have it :)https://twitter.com/PonceCampuzano/status/1190126122442379264 …
0:26Thanks. Twitter will use this to make your timeline better. UndoUndo
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