Fig. 4

FPT density for SF networks with parameters m₀ = 11 and m = 1 (tree SF network), m ∈ [2,9] (non-tree SF network) with N = 100 nodes. Travel time distribution for all the nodes is \( {\tilde{\psi}}_{x{x}^{\prime }}(s)=1/\left( s\tau +1\right) \); τ = 1. The starting point x₀ and absorbing point x_a are randomly chosen in each SF network