Eigenvalue ratios, b/a and c/a, as a function of the logarithm of the halo mass (M₂₀₀). Left panel: b/a as a function of c/a in bins of the logarithm of halo mass. This panel shows a zoomed-in view of the region displayed in Fig. 1, centered at origin. The dotted black lines delineate the regions that the eigenvalue ratios may occupy. The upper limit of the graph, b/a = 1, indicates that b/a < 1 whenever a > 0. The positively sloped dotted black line indicates the condition a > b > c, which implies b/a > c/a if a > 0 and b/a < c/a if a < 0. Right panel: Median values of b/a (triangles) and c/a (circles) for equal bins of the logarithm of the halo mass, as a function of the logarithm of the halo mass. In both panels, each color corresponds to each halo mass bin, as indicated by the legend.