The Klein Bottle
The Klein bottle is a well-known surface related to the Möbius strip. In topological terminology, a Klein bottle is a nonorientable two-dimensional manifold. This Demonstration implements a standard graphical representation of the Klein bottle.
This Demonstration implements the Klein bottle representation from .
 Gnuplotting. "Klein Bottle." (Aug 29, 2019) www.gnuplotting.org/klein-bottle.