Veblen, Oswald, 1880-1960, Young, John Wesley, 1879-1932 · Boston, New York [etc.] Ginn and Company · leaf 308
§101] PAIRS OF CONICS 293 b2 = a2 and b1 = 0. Hence, if A2 and B2 are to have a common self-polar figure of Type V, the equation of B2 must have the form (13) a2(x2 + 2 x^xz) + a3x2 = 0. From the form of equations (8) and (13) it is evident that the conies have in common only the point (1, 0, 0)…
Geometry, Projective
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