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 165
e considered as perspectives of one another.Without discussing the possibilities of real and imaginary solu-tions of these equations the case will be considered where Kand Kf have four real points of intersection 1, 2, 3, 4, Fig. 61. 152 PROJECTIVE GEOMETRY. K and K have the self-polar triangle XYZ… … Fig. 6i. points of intersection of common tangents, because a tangentfrom the center of perspective to one conic is also a tangent tothe perspective conic. The common chords 12 and 34 as wellas the chords of contact AB and AW pass through X when pro-duced. Choosing 34 as the axis of a central…
Geometry, Projective · Geometry, Analytic
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