Veblen, Oswald, 1880-1960, Young, John Wesley, 1879-1932 · Boston, New York [etc.] Ginn and Company · leaf 121
Fig. 48 point. By Theorem 18 there is only one such collineation II. By thesame theorem it is clear that II is fully determined by the projec-tivity it determines on two of the sides of the invariant triangle, say02Os and OxOz. Hence, if Hx is a homology with center Ox and axis02Os, which…
Geometry, Projective
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
