Figure 8. The critical threshold of multiplex networks in dependence on the network average degree under multiplex node-based targeted attack (red line) and layer node-based targeted attack (black line).

The networks used are (a) multiplex ER networks with average degree z₁ = z₂ = z and (b) multiplex SF networks with average degree z₁ = z₂ = z. The size of all the networks is N = 5000.