Higher geometry; an introduction to advanced methods in analytic geometry (1922)
Woods, Frederick S. (Frederick Shenstone), 1864- · Boston, New York, Ginn and Company · leaf 34
f the points of thepencil of points and of the linesof the pencil of lines. Since anychange of coordinate of either ofthe pencils is expressed by alinear relation, the two pencilssatisfy the definition of projec-tive figures. Two pencils (ranges) of pointsare in perspective when they areperspective… … Fig. 6 22 ONE-DIMENSIONAL GEOMETRY
Geometry, Analytic
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
