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 44
g. 10. These determine two projective pencils ofrays through the points L and If. Taking c and c as bearersof two ranges of points, obtained by the intersections of a!, b, PENCILS AND RANGES. 3* cf,... iand a, h, c with c and <?, respectively, we have accord-ingly the projective ranges {c-abc… … Fig. Hence, if any ray x of the first pencil is given, we know thatthe corresponding ray ocf will be situated in such a manner thatthe line joining (xcf) and (xfc) will pass through P, and xf isfound by joining the point of intersection of x and c to P bya line £. The line joining U to the point of…
Geometry, Projective · Geometry, Analytic
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
