Figure 7. The critical threshold of multiplex networks in dependence on the network average degree under multiplex node-based random attack (red dash line) and layer node-based random attack (black solid 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.