First four (from left to right) singular vectors in l, m, and p for the case shown in red in Fig. 13. Top row shows the cos component and the bottom row shows the sin component. Each block shows the mean over i of the absolute value of the singular vectors as a function of l (horizontal) and m (vertical) for 0 ≤ m ≤ l ≤ 10. The blocks have been individually normalized to have identical maximum values.