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sábado, 26 de abril de 2008

In mathematics, the Klein bottle is a certain non-orientable surface, i.e., a surface (a two-dimensional topological space) with no distinct "inner" and "outer" sides. Other related non-orientable objects include the Möbius strip and the real projective plane. Whereas a Möbius strip is a two dimensional object with one side and one edge, a Klein bottle is a three dimensional object with one side and no edges....The Klein bottle was first described in 1882 by the German mathematician Felix Klein...

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