Veblen, Oswald, 1880-1960, Young, John Wesley, 1879-1932 · Boston, New York [etc.] Ginn and Company · leaf 307
is also a range) of conies of Type IV.Corollary. A pencil of conies of Type IV may be represented bythe equation X^ X.2 -j- A.X3 == U , and also by the equation x2 + \x2x3= 0. Type V. When the common self-polar figure is of Type V, let thepoint of fixed lines be (1, 0, 0) and the line of fixed…
Geometry, Projective
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