Smart, Edward Howard · London : Macmillian and Co. · leaf 248
however, to study the proofs of each of a pair oftheorems independently before proceeding to compare thempoint by point. (a) Prop. The locus of theintersections of correspondingrays of two homographic pen- (h) Prop. The envelope ofthe joins of correspondingpoints of two homographic 220 PROJECTIVE… … Fig. 112a, Fig. 112&. Let a, a be a pair of corre-sponding rays of two homographicpencils whose vertices are respec-tively V and v. Let the line VV be denoted by o. Draw the ray o of the pencilwhose vertex is V correspondingto the ray o of the pencil whosevertex is V (§ 10, Chap. XIL). Describe…
Geometry, Projective
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