An introduction to projective geometry and its applications; an analytic and synthetic treatment (1905)
Emch, Arnold, b. 1871 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 241
7 one section, say CA, is acted upon by a tensionand the other, CB, by a compression, it is apparent that corre-sponding rays of the involution (§ 3) move in opposite directions. 228 PROJECTIVE GEOMETRY. The involution is hyperbolic and has two real double-rays(sections) in which only shearing…
Geometry, Projective · Geometry, Analytic
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