Figure-8 Klein Bottle
The Klein bottle can be immersed in three-space in two distinct ways. One
is the standard "tube-through-a-tube" immersion shown in Klein Bottle, which has a reflective
symmetry. Another immersion is formed by a figure-8 curve that moves around
a circle while spinning by 180 degrees. This version has an axis of
two-fold rotational symmetry (from lower left to upper right in this image).
Here, the surface is banded so that the figure-8 curves are more easily
seen.
This image appeared in Beyond the Third Dimension.
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