Dierck-Ekkehard Liebscher
Relativity, geometry, and cosmology in pictures
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Gesamtschau   
Distances    
Reflections    
Projective geometry    
Conics   
Minkowski    
Lobachevski    
Curvature    
Michelson    
Space-time    
Special relativity    
Try it yourself relativity    
Mass and energy    
Gravitation    
Cosmology    
Cosmic nucleosynthesis    
Cosmic structure    
Cosmic vacuum    
Cosmic pinpoints    
Time and entropy    
Quantum physics    
Physics supplement    
Paper polyhedra
Non-euclidean (Lobachevski) geometry in pictures
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