The presence of the finite density effect in the crossover degree ratios k_c(ρ)/k_c(ρ = 2) versus the parameter δ with an SF network size L = 4000, for various densities ρ = 1 (black open diamonds and solid line), 5 (blue open triangles and solid line), and 10 (red open squares and solid line), respectively. The solid lines correspond to the theoretical calculation and the symbols to the MC simulation data. Note that k_c’s do not exist in regime δ > δ_c (δ_c = 0.5 is the vertical red dotted dash line) for ρ = 5 and ρ = 10 due to the lower bound of degree k_min, two theoretical dashed lines are only formally drawn in that region.