Standard Dynamic Horn Torus

 
 
+

=  
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revolution:
turn ('torsion') of latitudes
(changing their values when turning around bulge of torus)

+
rotation:
turn ('spin') of longitudes
(changing their values when turning around symmetry axis)

=
dynamic horn torus
combination of both turns,
here with ratio of angular velocities 1:1.
This is the standard dynamic horn torus,
the natural unit for self-metrification
(for more see 'Analogies' and 'Metric')

 
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