Smart, Edward Howard · London : Macmillian and Co. · leaf 243
, where P is the point ofintersection of CD and AB. … . TP.CD PT.CD . ^^ ^^•• TDXP^PDTct •• TD.CP=-PD.CT, which may be written ^—-^r-= - 1.■^ TD. PC Hence TCPD is a harmonic range. II. We may prove the property of the hyperbola establishedin § 5 (V.) of Chap. IX. For if GO, 00 denote the points at infinity on the hyperbola(Fig. 109), and P, Q any two…
Geometry, Projective
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