Images for Mathematics

A Moebius strip

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If we take a long and narrow rectangle and paste together the two shortest sides after having impressed three half a torsions, we get an anomalous Moebius strip: the boundary is made of one circumpherence (as in the case of the "usual" Moebius strip), but this circumpherence is tied as in a trefoil knot.

The image belongs to the sections...:
From "fragments of topology" (From "XlaTangente")
The Moebius strip (Topology)

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