“Parallel lines have a common end point at an infinite distance.”
Brouillion project (1639) as quoted by Harold Scott MacDonald Coxeter, Projective Geometry (1987)
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ca. 1640) as quoted by William Thompson Sedgwick, Harry Walter Tyler, A Short History of Science https://books.google.com/books?id=Wl8AAAAAMAAJ (1917
“When no point of a line is at a finite distance, the line itself is at an infinite distance.”
Brouillion project (1639) as quoted by Harold Scott MacDonald Coxeter, Projective Geometry (1987)
“He who shall wish to disentangle this proposition will easily be able to compose a volume.”
ca. 1640) as quoted by William Thompson Sedgwick, Harry Walter Tyler, A Short History of Science https://books.google.com/books?id=Wl8AAAAAMAAJ (1917