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X(3), X(6), X(15), X(16), X(2574), X(2575)

Q1, Q2, Q3 : vertices of the Thomson triangle

foci of the Steiner inellipse

Q137 is a circular quartic with singular focus X(23) and with two real asymptotes which are the parallels at X to those of the Jerabek hyperbola. X is the barycentric product X(30) x X(599) with SEARCH = 4.60993353847739. This point is now X(13857) in ETC (2017-07-11).

Q1, Q2, Q3 are points of inflexion with inflexional tangents passing through X(3). The polar conic of X(3) is the Jerabek hyperbola of the Thomson triangle.