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X(1), X(19), X(3375), X(3384), X(9219), X(9275) A1B1C1 : cevian triangle of X(110) A2, B2, C2 : intersections of the Brocard axis with the sidelines of ABC |
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Q121 is an unicursal quartic with triple point X(1). The tangents at this point pass through X(21), X(1094), X(1095) respectively. The tangents at A, B, C concur at X(1109). Q121 is the locus of inflexion points of the cubics (KT) described in the page K457. |
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