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 225
as usual, has been assumed infinitelydistant, to B^, B2, B^, and constructing the fourth harmonic raysto the pairs of sides passing through these points, it is seen by 212 PROJECTIVE GEOMETRY. passing over to the limit that the fourth harmonic rays at B^ andB^ coincide. As before, they cut the… … ^■ / / 1 , - volutions, and only the rays between A^ and ^3 contain hyperbolicinvolutions. The only branch of the cubic is therefore containedbetween two lines through ^l^ and A^ parallel to the directionof B. The ray through ^43^4 carries a parabolic involution, andA^A^ represents an isolated…
Geometry, Projective · Geometry, Analytic
Internet Archive · Boston College Libraries · Public Domain Mark 1.0. Free to use for anything.
