In geometry, the Thomson cubic of a triangle is the locus of centers of circumconics whose normals at the vertices are concurrent. See also Cubic plane curve – Thomson cubic References Viktor Vasilʹevich Prasolov: Essays on numbers and figures. AMS, 2000, ISBN 9780821819449, p. 73 External links K002 (Thomson cubic) at Cubics in the Triangle Plane Curves defined for a triangle