Home page  Catalogue  Classes  Tables  Glossary  Notations  Links  Bibliography  Thanks  Downloads  Related Curves 

too complicated to be written here. Click on the link to download a text file. 

X(1), X(3), X(5373) Q1, Q2, Q3 vertices of the Thomson triangle excenters I1, I2, I3 excenters of the Thomson triangle F1, F2 real foci of the Steiner inellipse infinite points of the McCay cubic 

The Thomson triangle is formed by the intersections (apart A, B, C) of the Thomson cubic and the circumcircle. Q091 is the locus of M such that M and its two isogonal conjugates in the triangles ABC and Q1Q2Q3 are collinear. Q091 is also the locus of P such that there is a nodal cubic passing through the vertices of the triangles ABC, Q1Q2Q3 and whose tangents at its node P are perpendicular. See K626 for example. 
