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 171
\o K and let this tangent correspondto / in the collineation. t and t cut p and p in two correspond-ing points X and A^, and the center or, if there are several, thecenters of possible collineations must be on the line joining Xwith X. To determine these centers, join C with X, and thepoint of… … FiG. 66. tained as intersections of CC and C^C with XX. To the point oftangency T ol t with K correspond in the two colhneations T THEORY OF CONICS. 159 arid Ty^ on /, which are the points of tangency of the two conies Kpassing through A BCD and tangent to /. That these are the only solutions is…
Geometry, Projective · Geometry, Analytic
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