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 65
Fig. 20a. … If k is negative, P and P are on different sides of C, and thecenter lies between tt and tz. li k = — i, the center is in themiddle of n^ and tt and the perspective becomes central symmetry,Fig. 20b. COLLIN RATION. 53 C. Affinity.^—By this term we designate a perspectivewhose center is at an…
Geometry, Projective · Geometry, Analytic
Internet Archive · Boston College Libraries · Public Domain Mark 1.0. Free to use for anything.
