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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 (20170711). 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. 
