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 88
points (the only line or curve determined by two points). Anorthographic projection (oj course, also a perspective) oj a straightline is also a straight line. Hence, if A, A\ B, B are theprojections of two points, the lines joining A, Bf and A, B COLLIN EA TION. 75 are the corresponding projections… … Fig. 26. i2 = vertical trace). A point P is situated on AB when Pf is on AB, P on AB, and PPLGL, Fig. 26. To find the traces t1} t2 when A rBr and AB are given we notice that the F-projection of a point in H lies in GL, and that the iJ-pro- jection of a point in V lies also in GL; the other…
Geometry, Projective · Geometry, Analytic
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