youtor.org
Projection from Hyperboloid to the Beltrami–Klein disk
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Video Source: www.youtube.com/watch?v=KO5eE5d59vQ
This video is showing a projection from the hyperboloid unto the unit disk. The hyperboloid is the Lorentzian model of non-Euclidean geometry. The unit disk is the Beltrami–Klein model of hyperbolic geometry. The red line is a geodesic on the hyperboloid. The green line is a geodesic on the Beltrami–Klein 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