FIGURE 1.

(A) Schematic illustrating changing network configuration over time wherein all nodes are part of the same network, only the directional connections between them change with time. For example, nodes A, B, and C are part of the same network at both time instants, but the connections between them change from the first to the second time instant. Here, C influences A at the first time instant whereas this is absent at the second time instant, when C influences B. Yet, at both time instants, nodes A, B, and C are a single connected component. (B) Schematic illustrating changing network configuration over time wherein both directional connections between nodes and the networks themselves are changing with time. For example, nodes A, B, and C are part of the same network at the first time instant; however, at the second time instant, nodes A, C, and E are part of the same network and node B is left out. Here, no connections between C and E changes to a directional connection from C to E. Therefore, both connections and network configurations change with time.