Projecting Euclidean 3D space onto the hypersphere, and rotating that Non-Euclidean space in 4-dimensions. Read more about it here: http://spacesymmetrystructure....
Poincaré strikes back: Escher's "Angels and Devils" (Kreislimit IV) flying (= moving isometrically) in the non-Euclidean 2-dimensional universe determined by the Poincaré circle model.For more information, films and interactive material, see http://tinyurl.com/3f3934
In non-euclidean geometry, a circle is a conic that is doubly tangent to the absolute conic.For more information, films, and interactive material, see http://tinyurl.com/4krcmg
Poincaré strikes back: Escher's "Angels and Devils" (Kreislimit VI) flying in the non-Euclidean 2-dim universe determined by the Poincaré circle model.For more information, films and interactive material, see http://tinyurl.com/3f3934
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