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X(3), X(23), X(110), X(187), X(6141), X(6142) vertices of the Thomson triangle singular focus : X(14702 = inverse of X(5655) X(14915) = infinite point of the lines 3,1495 - 20,1216 - 23,74 - 52,3146 - etc |
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K903 is a member of the pencil of strophoids generated by K038 and K039. These two latter cubics are the inverses (in the circumcircle of ABC) of the Stammler and Jerabek hyperbolas respectively. K903 is the inverse of (JT), the Thomson-Jerabek hyperbola. See K002. The singular focus of K903 is X(14702). |