Figure 1: Graphical representations of the mean field equations.
From: Multiple tipping points and optimal repairing in interacting networks
(a) The blue and brown curves represent equations (1) and (2), respectively, for 
, rA=rB=0.60 and rd=0.15, in a system with two interdependent networks (k=16, m=8). There are nine intersections, representing mathematical solutions for network activities aA and aB. Four of them are stable solutions (green circles) representing physical states that we also observe in our simulations and five are unstable solutions (red crosses). (b) Example for 
, 
, rA=rB=0.60 and rd=0.15. Here we obtain two stable solutions and one unstable solution. The two stable solutions correspond to 11 state (both networks are at high activity) and 22 state (both networks are at low activity).
