Hecke Tree z maps to {pz, (z+1)/p,...(z+p-1)/p } (the 1-sphere). hecke_tree.mov CM Points: Points of the form z = (-b +sqrt(D) ) / 2a for negative D cm_points.mov CM Points with multiple orbits Multiple orbits with respect to multiplication of an ideal (P) which is a factor for some prime p. cm_points_multiple_orbits.mov