English: Diagram of the 3 standard points on the projective line {0, 1, ∞}, together with the points stabilized by subgroups of their stabilizer in the projective linear group, namely −1, 1/2, 2 (each stabilized by a 2-cycle), together with ${\displaystyle \zeta _{\pm }:=e^{\pm i\pi /3}={\tfrac {1}{2}}\pm {\tfrac {\sqrt {3}}{2}}i}$, the solutions to ${\displaystyle x^{2}-x+1}$ (the primitive sixth roots of unity, both stabilized by both 3-cycles).