Smart, Edward Howard · London : Macmillian and Co. · leaf 136
ell to consider the case of the parabola a little morein detail, as some useful properties of the curve follow readilyfrom the same figure. Let T, T (Fig. 53) be the poles with respect to the circle ofQQ, PP respectively, and let TP be the vanishing line. Thecircle projects into a parabola. The… … Tat
Geometry, Projective
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