Non-Euclidean geometry; a critical and historical study of its development (1912)
Bonola, Roberto, 1874-1911, Carslaw, H. S. (Horatio Scott), 1870-1954 · LaSalle, Ill. : Open Court Publishing Co. · leaf 84
^M Fig- 34. … Fig. 35- Draw through A, between AB and AM, the line AFin any direction. Produce AF backwards and upon it take any point Q.Then, by the definition, QA must cut BN, for example, 70 III. The Founders of Non-Euclidean Geometry. in R. Therefore AP lies within the closed figure AARB,and must cut one of…
Geometry, Non-Euclidean
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