An introductory account of certain modern ideas and methods in plane analytical geometry (1894)
Scott, Charlotte Angas, b. 1858 · London, New York : Macmillan and Co. · leaf 184
atio of foui- points is e(jual to tliat oftheir conjugates, wliieh shows that the three segments AA,YY, ZZ are in involution. CROSS-RATIO, HOMOGRAPHY, AND INVOLUTION. 169 Taking for the transversal the special position EF, thepoints A^, X come together at E, and the points Y, Y atF; these are… … Hence to construct Z, the conjugate to Z in the involutiondetermined by XX, YY, it is necessary to construct acomplete quadrangle whose sides shall pass through tlie points.For this the lines tlirougli Z, Y, Y may be taken arljitrai-ily,but then the points B, I) are known, and these nuist bejoined…
Geometry, Analytic -- Plane
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