In geometry, the Thomson cubic of a triangle is the locus of centers of circumconics whose normals at the vertices are concurrent.
The Thomson cubic (black curve) contains the point X whose isogonal conjugate (X') is on the line X(2)-X.ac
See also
Cubic plane curve – Thomson cubic
References
Weisstein, Eric W. "Thomson cubic". MathWorld.
Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
Hellenica World - Scientific Library
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