Veblen, Oswald, 1880-1960, Young, John Wesley, 1879-1932 · Boston, New York [etc.] Ginn and Company · leaf 186
f a point referred to two axes are called point coordinates ;the coordinates of a line referred to two centers are called line coor-dinates. The line lm and the point ij are called the singular line andthe singular point respectively. 61. Simultaneous point and line coordinates. In developing… … Fig. 80 0, U, V. Let the lines 0 U and 0 V be the y- and a>axes respectively,and in establishing the scales on these axes let the points U, V bethe points oov, oo^ respectively (fig. 80). Further, let the points U, Vbe the ^-center and the v-center respectively, and in establishing the 172…
Geometry, Projective
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