Order in projective and in descriptive geometry
Oswald Wyler (1953)
Compositio Mathematica
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Displaying similar documents to “A mathematical theory of origami constructions and numbers.”
Order in projective and in descriptive geometry
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This "Corolarium" of the (1733) contains an original proof of propositions 1.27 and 1.28 of Euclide's . In the same corollary Saccheri explains why he dispenses "not only with the propositions 1.27 and 1.28, but also with the very propositions 1.16 and 1.17, except when it is clearly dealt with a triangle circumscribed by alls sides"; and also why he rejects Euclide's proof. Moreover the corollarium has implications for confirmation of Saccheri's method; and also for his concept of...
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