Cremona–Richmond configuration

The Cremona–Richmond configuration is a specific configuration of points and lines in projective geometry. It consists of 6 points and 6 lines in a projective plane, derived from certain algebraic properties of cubic curves. In this configuration: - There are 6 points, usually denoted as \( P_1, P_2, P_3, P_4, P_5, \) and \( P_6 \).