Slices of the local relaxation rate, ∂F/∂t, from Figure 3 for fixed J_r (top) or fixed L (bottom), as predicted from BL (dashed) and measured in N–body simulations (full lines). Here, ∂F/∂t in the top (resp. bottom) panel has been averaged over an interval of width δJ_r​ = ​ ± 0.02 (resp. δL​ = ​0.06) and subsequently smoothed with a running average of width δL​ = ​0.03 (resp. δJ_r​ = ​0.01). For the N–body, we measured ∂F/∂t in each realisation independently, estimated the standard deviation among the sample of realisations, and represented the level lines one standard deviation away from the mean value.