Figure 3

Percolation transitions in the star-like interdependent system of four network layers. Shown are graphical solutions of Eqs (7) and (8) for different values of α and z, as marked by the black dots. (a–c) For α = 0.9, the results for z = 1.2, z = 1.3 and z = 1.5, respectively. (d–f) For α = 0.7, results for z = 2, z = 2.2, and z = 2.2348, respectively. (g–i) For α = 0.6, the solutions for z = 2.4, z = 2.4833, and z = 2.6, respectively.