Veblen, Oswald, 1880-1960, Young, John Wesley, 1879-1932 · Boston, New York [etc.] Ginn and Company · leaf 28
perspective transfor-mation with center P, and then the points of m be transformed into thepoints of a third line m by a perspective transformation with a newcenter Q; and if this be continued any finite number of times, ulti-mately the points of the line m will have been brought into… … Fig. 2 to have been transformed into the points of min) by a projectivetransformation. Similarly, in three-dimensional space, if lines are drawn joiningevery point of a plane figure to a fixed point P not in the plane itof the figure, then the points in which this totality of lines meetsanother…
Geometry, Projective
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