Special cubics and quartics produced by projective pencils of straight lines and conics (1916)
Marshall, Robert Haskell · leaf 82
30- The triangle ^ 3 G in both figures is equilateral.The heavy curve in irigure Vill represents the locus of (4). The asymptotes of the quartic are x -^^ —0 and y — 0,The slopes of the tangents at the vertices and orthocenter ofthe triangle ABC are found by sucstituting the coordinatesof each…
